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Eco-Friendly Smart Farms Based On Nutrient Solution Recirculation
UV sterilization and microbial stability analysis used to recycle nutrient solution; proposed method minimizes the use of fertilizers and water by hydroponic farms
15-JUN-2021
UV sterilization and microbial stability analysis used to recycle nutrient solution; proposed method minimizes the use of fertilizers and water by hydroponic farms
NATIONAL RESEARCH COUNCIL OF SCIENCE & TECHNOLOGY
The development of new urban agriculture technologies, such as vertical and smart farms, has accelerated rapidly in recent years. These technologies are based on hydroponic cultivation in which plants are grown using nutrient-rich solutions rather than soil. Approximately 20-30% of the nutrient solutions used during hydroponic cultivation are discharged without being absorbed by the crops, and because most farmers in South Korea do not treat the discharged solutions, hydroponic farms contribute significantly to environmental pollution.
This problem can be reduced if hydroponic farms use a recirculating hydroponic cultivation method that reuses the nutrient solutions after sterilizing them with ultraviolet (UV) light, instead of discharging them. However, two main issues complicate the implantation of such recirculation systems. First, the potential for diseases and nutrient imbalances to develop owing to microbial growth in the recycled nutrient solutions must be eliminated. Second, the initial investment required to set up a recirculating hydroponic cultivation system is often prohibitive, costing hundreds of millions of Korean won per hectare.
However, a new study conducted by researchers at the Korea Institute of Science and Technology (KIST) proposes a method that can stably manage the microbial population in recirculating hydroponic cultivation systems. The research team, led by Drs. Ju Young Lee and Tae In Ahn of the Smart Farm Research Center, KIST Gangneung Institute of Natural Products, conducted an integrated analysis of the microbial growth characteristics by constructing a model that simulates the flow of water and nutrients, and the inflow, growth, and discharge of microorganisms in recirculating and non-circulating hydroponic cultivation systems. Their simulations revealed that the microbial population in recirculating hydroponic cultivation systems can be controlled by adjusting the UV output and the water supply. On the contrary, in non-circulating hydroponic cultivation, the microbial population fluctuates considerably depending on the amount of water used, increasing sharply if there is too little water.
KIST researchers are experimenting with a circulating hydroponic cultivation system. Credit: Korea Institute of Science and Technology (KIST)
High cost has restricted the use of UV sterilization systems in hydroponic farming in Korea And prompted the research team to develop their own UV sterilization system, with further studies underway to commercialize this system as an economical alternative to imported systems.
The results of the study have already received strong interest: the rights to the operation and management software technology for recirculating hydroponic cultivation has been acquired by Dooinbiotech Co., Ltd. for an advance fee of 80 million won (8.5% of the operating revenue), while an agreement is in place with Shinhan A-Tec Co., Ltd. for the advanced recirculating hydroponic cultivation technology for an advance fee of 200 million won (1.5% of the operating revenue). Commercializing the recirculating hydroponic cultivation system is expected to reduce fertilizer costs by approximately 30~40%, which equates to 30 million won per year based on a 1-hectare farm.
Commenting on the envisaged impacts of the study, Dr. Ju Young Lee said, "The developed system makes the transition to eco-friendly recirculating hydroponic cultivation systems an affordable option for many more farmers." Dr. Tae In Ahn added, "We are also developing software and operation manuals to guide farmers in managing the nutrient balance in the solutions to increase the number of farms using the recirculating hydroponic cultivation system."
Lead photo: THE INTEGRATED MODEL DESCRIPTION. view more
CREDIT: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY(KIST)
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The study was supported by the Ministry of Agriculture, Food, and Rural Affairs (Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry) and the Innovative Smart Farm Technology Development Program of Multi-agency Package. The research results are published in the latest issue of the Journal of Cleaner Production (IF: 7.24, ranked in the top 6.9% by JCR), a highly respected international journal in the field of environmental science.
Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.
Flushing Hydroponic Systems: Nutrient Imbalance, Waste, And An Alternative Solution
We recommend that hydroponic growers flush their systems every month to every few months, depending on the type of system they’re running. But why? We’re also fans of the recirculating system because it conserves water and nutrients
We recommend that hydroponic growers flush their systems every month to every few months, depending on the type of system they’re running. But why? We’re also fans of the recirculating system because it conserves water and nutrients.
Article from | ZipGrow
04/06/21
Is flushing hydroponic systems wasteful?
We recommend that hydroponic growers flush their systems every month to every few months, depending on the type of system they’re running. But why? We’re also fans of recirculating system because it conserves water and nutrients, so it seems counterintuitive to dump gallons of nutrient solution every few months.
Let’s talk about why this is necessary and how you can practice conservation.
The problem: nutrient imbalance
The main reason for flushing a hydroponic system is a nutrient imbalance. Hydroponic fertilizers are specifically formulated for specific crops (you can buy nutrients for a type of crop, like greens or flowers), but each farmer grows a different combination of crops in different conditions, and the ratios in which plants take up nutrients is usually just a little bit off.
This nutrient imbalance is also affected by metal components if the system has any. Zinc and aluminum ions can cause toxicities if they accumulate over time. While it’s easy to just use plastic tanks and fittings or to coat the metal components in your system with epoxy to reduce leaching, sometimes the presence of metal is unavoidable.
Another reason that growers flush their system is a hygiene practice. Algae and many plant pathogens can survive in the water, and regular cleaning with a mild bleach or peroxide solution or another oxidizing agent is a preventative measure.
Two solutions: flushing and mass balancing
Most hydroponic growers take care of this nutrient balance problem by flushing the system and starting from scratch with nutrients. This is certainly the easiest method. Be sure to check with your local town or municipality to follow the correct disposal procedure.
This practice can have a downside, however, because often the solution dumped from a system when it is being flushed isn’t used elsewhere. This can be wasteful.
The alternative to flushing a hydroponic system is to learn to mass balance. To do this, growers would get their water tested for individual nutrient levels. This usually has to be done through a lab.
Then the grower would adjust each individual nutrient to its proper level.
The reason that many growers choose to flush over mass balancing is that lab tests can be pricey (you’ll probably have to pay at least $50, and sometimes up to $500). Still, this option can be cost-effective, depending on the size of the system and access to lab testing.
Ultimately, how you choose to deal with a nutrient balance is up to you.
The content & opinions in this article are the author’s and do not necessarily represent the views of AgriTechTomorrow
Indoor & Vertical Farming, Monitoring & Growing Fertilizer, Hydroponics
Your Quick Guide To Grow Room Controllers
A grow room controller brings together all the moving parts of your cultivation facility and allows you to automate your operation
March 5, 2021
What is a Grow Room Controller?
A grow room controller brings together all the moving parts of your cultivation facility and allows you to automate your operation. With a grow room controller, you can monitor and control your climate, lighting, irrigation, fertigation, and track your crop’s success to adjust and improve each cycle. These control systems can connect to existing equipment or come with their own set of sensors to track your environment, and adjust according to your set parameters, ultimately saving you time and money.
Grow room controllers integrate with existing systems, or can be purchased with sensors and equipment for larger operations. Some systems need only a few sensors and an application for your phone or computer, while others require larger computing and monitoring devices. Which option you choose will largely depend on the size of your greenhouse or indoor growing operation.
Being able to monitor and control your indoor or greenhouse facility is crucial for consistent and desired results. These systems are a huge benefit to all crop types, including cannabis, and can be adjusted to fit your cultivation style and desired outcomes. Not only will you be able to more accurately track and monitor your crop’s progress, but you can then take that learning and replicate it or improve upon it for your next growth cycle.
The Benefits
Grow room controllers offer you complete control and oversight of your crop. Any environmental aspect that you wish to control can be monitored and adjusted with a grow room control system. More advanced systems offer automation for your whole system, allowing you to pull yourself out of the weeds (pun intended) of trying to control everything manually. Grow room controllers are also scalable, especially if you purchase a setup with that in mind, allowing you to expand your facility but keep the same environmental parameters and automation.
All greenhouse and indoor growers know that having control over your environment is crucial to achieving desired results. This means monitoring and adjusting your lighting, climate, irrigation, and fertigation to ensure consistency, which can be time-consuming. A greenhouse control system does the monitoring and adjusting for you, ensuring all of the environmental controls work together and are adjusted accurately.
With advanced control systems, you can program light preferences for your greenhouse, so if light falls below a certain threshold your lights will adjust and will turn off if it exceeds that threshold. Indoor growing can also benefit from lighting such as timers and spectrum controls. Hydroponic sensors in your medium can tell you if you need to increase or decrease water durations. Ultimately being as efficient as possible with water and electricity, which is both environmentally and economically beneficial.
This monitoring and automation are incredibly cost-effective in the long run for your greenhouse or indoor facility. The more automation you have, the less labor you need to support your cultivation, and labor is one of the most, if not the most costly aspect of a cultivation facility. Grow room and greenhouse control systems can also schedule timers and alarms for preventative maintenance so that your equipment can receive proper downtime, preventing blowouts and loss of productivity.
How to Select a Grow Room Controller
Figure 1 from GroAdvisor Webinar
The above worksheet is an example of how you can select the right grow room controller for your needs. While many focus on cost, it’s also important to take into account which system will integrate with and enhance your facility the most. Take stock of your equipment and current manual system to ensure that your new grow room controller will add value to your operation.
Finding a grow room controller that is right for your facility will help you realize your fullest growth potential. Once you have compared and found a system that can accommodate the environmental controls you’d like to track and automate, all that’s left is the installation. Once the grow room controller is installed and your parameters are set you will no longer have to manually adjust your elements, saving time and labor, which ultimately saves money.
VIDEO: What Makes Organic Food "Organic"?
Organic food is no longer a niche market. Sales of organic food products in the European Union have more than doubled over the last decade - from €16.3 billion in 2008 to €37.4 billion in 2018 - and demand continues to grow
The EU is the second-largest consumer of organic food in the world. - Copyright nsplaUsh
Organic food is no longer a niche market.
Sales of organic food products in the European Union have more than doubled over the last decade - from €16.3 billion in 2008 to €37.4 billion in 2018 - and demand continues to grow.
However, many Europeans are still unsure of what "organic" really means. Is it natural? Free of pesticides? Locally grown?
Well not exactly. Here are some of the conditions food products must meet in order to be considered organic in the EU:
No synthetic fertilizers
Natural fertilizers, such as compost and seaweed derivatives, are essential to maintaining fertile and healthy soil. So organic food must be grown with these products, rather than synthetic fertilizers that are used in conventional farming, and which tend to be made of harsher chemical ingredients including nitrogen compounds, phosphorus, and potassium.
"Organic farming improves soil structures and quality and enhances biodiversity. Studies have shown that organic farming present 30% more of biodiversity in the fields", explains Elena Panichi, Head of Unit at DG Agriculture and Rural Development (DG AGRI).
No synthetic pesticides
Farmers need to fight weeds and pests. Organic farmers are only allowed to use naturally-derived pesticides, made from plants, animals, microorganisms, or minerals.
"These chemicals are of a natural origin. For instance, essential oils, plant extracts, that are listed in the relevant regulation, and are authorized, following a process that implies a scientific committee to assess the effect on the environment", says Panichi.
Organic farms also have techniques such as crop rotation or planting different crops on the same plot of land, to help to prevent soil-borne diseases.
Natural predators, such as ladybugs, can also be an effective method of pest control.
However, it is important to remember that just because something is “natural”, it doesn’t automatically make it harmless to either people or the environment.
No GMOs
To be certified as “organic”, food cannot contain products made from genetically modified crops.
This rule is the same for organic meat and other livestock products. Besides, the animals are to be raised on 100% organic feed.
Antibiotics as a last resort
The animals we eat, or whose products we consume, need to be kept disease-free. Many conventional farmers routinely use antibiotics for disease prevention. These can end up making their way into the food chain.
Excessive antibiotics are not good for people or animals because they can help create superbugs. Antimicrobial resistance is a global concern. Every year, around 33, 000 people die in the EU, due to infections from antibiotic-resistant bacteria.
On organic farms, the use of antibiotics is severely restricted. Farmers control disease by limiting the number of animals they raise and using methods such as a healthy diet for their livestock. They are only allowed to use antibiotics when absolutely necessary for an animal's health, in order to avoid suffering, and when natural remedies such as phytotherapeutic and homeopathic medicines are not effective.
"If in conventional [farming], sometimes antibiotics are given as preventive tools, inorganics, antibiotics can be given as a last resort if there are no other methods to intervene. Normally, the higher animal welfare standards applied in organics already keep animals in a healthier status that prevent the use of antibiotics", explains Panichi.
However, studies have shown that antibiotic use on farms is on the decline. Sales of animal antibiotics in the EU have fallen by more than 34% between 2011 and 2018.
Better animal welfare
Organic farmers must provide the environmental conditions necessary for animals to express their natural behavior, such as adequate outdoor space. This is not compulsory in conventional farming.
There are additional rules such as the prohibition on caging or mutilation unless absolutely necessary for health reasons.
What "organic" doesn't mean
Locally grown
Europeans are the second largest consumers of organic in the world. Local supply can’t meet demand yet, so a large number of organic products are imported.
China, Ukraine, Dominican Republic and Ecuador are the main EU trade partners for organic food imports.
"Green" packaging
Words like “natural”, “green” or “eco” on labels and packaging do not necessarily mean a product is organic.
Healthy
There's a wide range of organic product on supermarket shelves, from burgers to pizzas, from cheese to wine. The health implications of consuming excess fats, salt, or sugar don't disappear just because a food product is organic. Too much fat, salt, and sugar are still bad for you, whether it is organic or not.
How can you be sure that the “organic” food you’re buying is actually organic?
EU organic logo European Commission
The most reliable way to know if a product is organic is if it has this official EU logo.
The white leaf on a green background means that EU rules on production, processing, handling, and distribution, have been followed and that the product contains at least 95% organic ingredients. This logo can only be used on products that have been certified by an authorized control agency or body.
Some countries have also created their own organic logos. They are optional and complementary to the EU's leaf. This is the French one, for instance.
French organic logo Agence Bio
New rules coming in 2022
EU rules on organic production will change soon. In 2022, Europe will have legislation with stricter controls.
Panichi believes it will bring a "substantial improvement" to the organic sector.
"We have to bear in mind that the new organic legislation is not a revolution, but it's an evolution of the organic legislation that started in the past years and has been kept evolving together with the sector".
The new legislation will harmonize rules for non-EU and EU producers. It will also simplify procedures for small farms in order to attract new producers, thanks to a new system of group validation.
The list of organic foods is expected to grow, with the addition of products such as salt and cork. The possibility of certifying insects as organic is also expected in the rules.
What is the future of organics?
"Surfaces in Europe are increasing or as well as all over the world, and they are increasing at a fast pace," says Panichi.
As part of its Farm To Fork strategy, the EU has committed to increasing organic production, with the goal of 25% of all agricultural land being used for organic farming by 2030. In 2019, it was only around 8%.
By 2030, Europe also aims to reduce the use of harmful chemicals and hazardous pesticides by 50%.
Buying organic food is still too expensive for many. One of Farm To Fork's main goals is to make healthy, sustainable food more accessible and affordable to all Europeans. A French family 2019 shows that a basket of eight organic fruits and eight organic vegetables is, on average, twice as expensive as a basket of non-organic products.
Note: The requirements listed in this article are just some of the conditions necessary for a product to be considered organic. If you want to know more about what is needed to obtain the green logo, please check the EU regulation.
Lead photo: EU organic logo European Commission
UNFI Picks Up Living Greens Farm Products in Midwest Expansion
Living Greens Farm (LGF), the largest vertical, indoor aeroponic farm in the US that provides year-round fresh salads, salad kits, microgreens and herbs, announced the addition of significant new retail distribution of its products in the upper Midwest to independent, specialty, and co-op retailers
I|mage from: Living Green Farms
Living Greens Farm (LGF), the largest vertical, indoor aeroponic farm in the US that provides year-round fresh salads, salad kits, microgreens and herbs, announced the addition of significant new retail distribution of its products in the upper Midwest to independent, specialty, and co-op retailers.
Starting February 2021, LGF’s full line of products featuring ready-to-eat bagged salad products (Caesar Salad Kit, Southwest Salad Kit, Harvest Salad Kit, Chopped Romaine, and Chopped Butter Lettuce) will be carried by UNFI Produce Prescott (formerly Alberts Fresh Produce). UNFI Produce Prescott is a division of UNFI, which distributes food products to thousands of stores nationwide. Their focus is on independent, specialty and co-op retailers.
UNFI has eight warehouses nationwide. LGF’s products will be carried by their upper Midwest location, located just across the river from the Twin Cities in Prescott, WI. This distribution center services hundreds of retailers throughout Minnesota, Wisconsin, Illinois, North Dakota, South Dakota, Missouri, Iowa and Nebraska. UNFI is the first national Certified Organic distributor, something they take a lot of pride in. Their produce and floral businesses are rooted in local farms and seasonal import growers.
LGF’s proprietary vertical indoor farming method yields the highest quality and freshest produce available. This is because there are no pesticides or chemicals used in the growing process. And because LGF’s growing, cleaning and bagging process significantly reduces handling and time to the retail shelf, consumers enjoy the freshest product on the market. These benefits continue to attract new users and new retail distribution as UNFI Produce Prescott is the second UNFI location to carry LGF. In December, UNFI’s Hopkins, MN location began offering LGF products.
For more information on why Living Greens Farm products are the cleanest, freshest and healthiest farm salads and greens available, go to www.livinggreensfarm.com.
VIDEO: Common Mistakes When Setting Up Hydroponics
Even if you have a lot of guidance in setting up your grow space, you may make mistakes in the initial development stages
January 4, 2021 | By Joy King
Starting a hydroponics garden is thrilling. It's an exciting project where you can enjoy the progress your plants make over time. However, producing perfect plants requires some skill and attention to detail that take time to develop. Even if you have a lot of guidance in setting up your grow space, you may make mistakes in the initial development stages.
What is hydroponics?
Wikipedia describes hydroponics as "a type of horticulture as a method of growing plants, usually crops, without soil. It's become popular in vertical and indoor farming. Let's examine some common errors to avoid when setting up a hydroponics grow:
Ignoring plants
New growers may not devote the amount of time necessary to grow hydroponically. Some mistakenly believe that they can check in on plants on the weekend. But, a lot can go wrong if you're not regularly checking on them. Even if your system is fully automated through a grow controller, it's essential to check on your plants daily to ensure that everything is going smoothly.
Check that your automation system isn't clogged or failed in some other way. Once you are a more experienced grower, it will become easier for you to identify failures in your systems and problems with your plants since you're dedicating time to their wellbeing.
Going overboard
More is not always better, particularly in regards to plant growth. Often, problems arise in the grow room from a lack of experience in tending to plants grown hydroponically. It usually takes time to understand how to irrigate and fertilize plants properly. Overwatering is often detrimental to plants, and beginners often do not realize they are overwatering before it is too late. Excessive nutrients, or nutrient burn as it's referred to, is also a common problem for beginners.
Overcrowding plants
It is common for beginners to overestimate how many plants will fit in their grow space. When you first plant them, it may seem that your plants have a lot of room, but once they grow up, they will need that extra space to maintain growth. Be vigilant about removing excess plants and pruning if overcrowding seems like it will be a problem. When in doubt, err on the side of caution and plant fewer plants.
Sudden changes to the environment
You need to give your plants time to adjust when you make changes. One of the most common problems that beginners face is when they suddenly change the grow room's light levels or room temperature. Any sudden increase in light may cause leaf bleaching and burning. It's better that you make changes gradually, giving your plants time to adjust.
Final thoughts
There are many scholarly books on starting hydroponics grow room or space. Do your research and enjoy your hydroponic garden! It's a rewarding way to grow food, cannabis, or flowers.
Source: Growlink
Tags: Hydroponics, Nutrient Dosing System, Wireless Automation, Automated Grow System, Customer Service, Automated Grow Systems, Nutrient Delivery System, nutrients, automation
5 Microgreen Types Packed With Nutrients You Should Be Eating
Microgreens are known for their nutrient-packed health benefits. But which microgreen types are the most nutritious and healthy to add to our diets? We are going to cover the top nutritious microgreen types and why you should add them to your eating habits now.
Microgreens are known for their nutrient-packed health benefits. But which microgreen types are the most nutritious and healthy to add to our diets? We are going to cover the top nutritious microgreen types and why you should add them to your eating habits now.
Arugula
In microgreen form, arugula has a nutty, peppery, wasabi-like taste. Arugula is one of the microgreen types that is nutrient-dense. It contains high amounts of vitamin C, copper, and iron, which help prevent illnesses like anemia. The phytochemicals also produce glutathione, which is an antioxidant. The combination of these health benefits help prevent and fight off toxins in the body.
Basil
The basil microgreen is a healthy addition to any salad since it has a crisp, citrus-like taste. This microgreen type has polyphenols that reduce oxidation and inflammation to promote gut health. It is high in vitamins such as A, B6, C, E, and it contains calcium, phosphorus, iron, zinc, copper, magnesium, and potassium. Basil is one of the microgreen types that are rich and nutrient-dense and can be a beneficial additive to your diet.
Pea Shoots
Pea shoots are one of the microgreen types that can be eaten raw or cooked. Add them to your salad or cook them in a stir fry to add nutrient-packed vegetables to your food. These microgreens have a plethora of vitamins such as vitamin A and C and folic acid.
Radish
Radish microgreens are known for their spicy flavor profile. You can top off your dishes with the raw radish sprouts to add some heat to any dish. These microgreens are rich in vitamins such as vitamins A, B, C, E, and K. They also contain high amounts of calcium, iron, magnesium, phosphorus, potassium, and zinc. Radish sprouts contain amino acids and chlorophyll, which helps fight illnesses such as cancer.
Broccoli
Broccoli microgreens is another one of the microgreen types that are delicious and nutrient-packed. These popular microgreens contain a high amount of vitamin C, which helps our immune system fight off sickness. They also contain antioxidants and cancer-fighting compounds.
Want to learn more?
Do you want to learn how to grow microgreens from the comfort of your home? We at the Nick Greens Grow Team use our in-depth knowledge to teach our subscribers how to grow microgreens at home!
Sign up for our microgreens class that takes place every Friday at 4:30 pm CST, and become a member of our FaceBook group to connect with others who are learning just like you. If you don’t want to take a class, subscribe to our blog and Youtube channel for weekly updates about growing microgreens and other farming related news!
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Hydroponic Nutrient Solution: A Must-Read Essential Beginner’s Guide
This article will teach you about hydroponic nutrient solutions and how to use them so you can hydroponically grow your own plants without worry
Many gardeners use hydroponics as their preferred way to grow plants because using a hydroponic nutrient solution ensures optimal plant growth. Using a hydroponic nutrient solution ensures that your plant’s roots get the nutrients they need from the water so they can grow with ease. This article will teach you about hydroponic nutrient solutions and how to use them so you can hydroponically grow your own plants without worry.
Macronutrients
Plants need macronutrients to be able to thrive and grow. The macronutrients that plants need are nitrogen, phosphorus, and potassium.
Nitrogen (N) - allows the plant to grow its leaves, its leaves’ colors, and provides amino acids, proteins, nucleic acid, and chlorophyll synthesis. When a plant is lacking in nitrogen, its leaves are typically a faded color and the plant grows at a slower rate.
Phosphorous (P) - is necessary for the synthesis of the plant’s DNA and RNA. It is also responsible for developing the plant’s stems, roots, flowers, and seeds. A deficiency in this nutrient leads to weak stems and leaves, and it causes root growth to slow.
Potassium (K) - synthesizes the proteins and carbohydrates of the plant. It helps develop the flowers, roots, and stems but not as much as compared to phosphorus.
Micronutrients
Alongside the macronutrients, plants also need micronutrients to grow. The nine micronutrients that a plant needs include:
● Boron: Works with calcium to help form cell walls by synthesizing the cell membrane’s structure and functions.
● Calcium: Works with boron to form cell walls
● Copper: activates enzymes and helps with respiration and photosynthesis.
● Iron: Forms chlorophyll, used in photosynthesis, and helps provide energy provision.
● Magnesium: catalyzes the growth process and helps makes oxygen during photosynthesis
● Sulfur: A component of two of the 21 amino acids that synthesize protein.
● Zinc: Helps form chlorophyll and assists with plant respiration and nitrogen metabolism
How to Form a Hydroponic Nutrient Solution
You can find a quality hydroponic nutrient solution at your local store, or you can create your own solution. It’s recommended for beginners to use store-bought solutions first, and once they get a hang of the hydroponic growing process then learning how to create your own hydroponic nutrient solution can be the next step.
Hydroponic nutrient solutions come in powder and liquid forms, which liquid forms being more popular to use. Since these liquid solutions are more concentrated, do not spill any on yourself or your plant. These typically come with pH buffers so you can test the water. You can mix the solution in the water, and it’s ready to go!
Make sure to choose a solution that is specifically made for hydroponic growing and not the all-purpose packages. Soil-grown plants have different needs than hydroponically grown plants. Try to purchase a 2 or 3 part hydroponic nutrient solution as well. This way you can mix in the solution depending on the needs of the plant at its specific life cycle. The 2 to 3-part solutions will contain separate packaging for macronutrients, a growing solution, and micronutrient solution depending on which one you get.
Want to Know More?
Now that you understand the basics of hydroponic nutrient solutions, you may want to learn more about hydroponic growing or growing plants at home! We at the Nick Greens Grow Team work diligently to provide the necessary research and information that covers everything from microgreen growing to hydroponics to way more!
Sign up for our new weekly microgreens class, which is held every Friday at 4:30 pm CST. Can’t make the class? Subscribe to our blog and YouTube channel for weekly updates about farming methods.
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Lettuce In A Hydroponic System: 100% Organic Nutrients
The hydroponic section in the company's innovation center has recently been redesigned and all ponds now receive a 100% organic nutrient solution
Van der Knaap is known for its substrate knowledge, but did you know they also developed a sustainable cultivation system? The liquid nutrient solution rich in organic NO3 that is produced with this system is also extremely suitable for other cultivation systems, such as growing lettuce in a hydroponic system.
The hydroponic section in the company's innovation center has recently been redesigned and all ponds now receive a 100% organic nutrient solution. The earlier phase of their research has already proven that the organic fertilizer holds its own compared to mineral fertilizer. On a number of points it even surpasses the traditional method, they report.
The follow-up research now focuses on influencing the cultivation by means of different pH values. In addition, the young lettuce plants get a good start on Obturo plugs or conventional pressed pots.
For more information:
Van der Knaap
www.vanderknaap.info
Publication date: Thu 8 Oct 2020
September Indoor Science Cafe Recording Is Now Available! "Hydroponic Nutrient Management Basics"
This presentation 'Hydroponic Nutrient Management Basics' was given by Dan Gillespie (JR Peters Inc.) during our 22nd cafe forum on September 22nd, 2020. Indoor Ag Science Cafe is organized by the OptimIA project team funded by the USDA SCRI grant program
This presentation 'Hydroponic Nutrient Management Basics' was given by Dan Gillespie (JR Peters Inc.) during our 22nd cafe forum on September 22nd, 2020. Indoor Ag Science Cafe is organized by the OptimIA project team funded by the USDA SCRI grant program.
Hydroponic Nutrient Solution Basics
All plants need fertilizer to live. In traditional gardening and farming, plants get their nutrients from soil and additive such as compost, manure, and chemical fertilizers. In hydroponics, plants are not grown in soil so nutrients must be delivered directly through the solution they are watered with.
All plants need fertilizer to live. In traditional gardening and farming, plants get their nutrients from soil and additive such as compost, manure, and chemical fertilizers. In hydroponics, plants are not grown in soil so nutrients must be delivered directly through the solution they are watered with.
These nutrients are divided into two categories: macronutrients and micronutrients. Macronutrients are those that plants need in large amounts, including carbon, phosphorous, hydrogen, nitrogen, oxygen, sulfur, potassium, magnesium, and calcium. Micronutrients are needed in tiny amounts but are essential. These include zinc, nickel, boron, copper, iron, manganese, molybdenum, boron, and chlorine.
Without these essential elements, plants are unable to build molecules, undergo enzymatic reactions, and complete the life cycle. For hydroponic gardeners, this means that without proper nutrients they cannot produce fruit or vegetables or that what they do produce would be sub-par.
Plant Needs
PH is also an essential element to consider. The pH value of a nutrient solution has a huge impact on the amount of nutrition a plant can absorb. It is essential to check pH levels on a regular basis, preferably daily, even if you are careful about measuring and mixing your nutrient solution correctly.
Different plants have slightly different requirements for pH value and nutrient concentration. If you are going to be growing a large variety of plants in your system, make sure to research the requirements for each so that you can group them in terms of their needs.
Temperature
A single plant’s needs may also change under different environmental conditions, such as weather, season, and temperature. This isn’t an issue for indoor setups that have a controlled environment, but it is something to consider if your system is located outside.
The nutrient solution must be kept at a steady temperature. The ideal is at room temperature, between 70 to 78 F. This is more of a concern for outdoor systems that are exposed to the weather. For winter, you can buy miniature water heaters that go inside your reservoir to keep the nutrient solution warm. For summer, keeping the reservoir in a shaded area and periodically topping it off with cool water is generally sufficient to keep it from getting too hot.
Pre-Made vs. Homemade
You can either buy a pre-made nutrient solution, or you can formulate your own. Small farms and hobbyists generally purchase pre-mixed liquid or powder concentrates that are added to water. Large-scale farms generally mix their own to the specific needs of whatever they are growing, using bulk concentrates of the individual chemical compounds.
Pre-mixed concentrates usually come in two separate bottles, one for macronutrients and one for micronutrients. They are separated because some elements are incompatible with each other when concentrated and cause precipitation when they are combined. Once diluted, they do not form precipitates and can be used together without issue. Some manufacturers have managed to hold the incompatible nutrients in a chemical complex so that they do not mix—these are sold in a single pack.
For hydroponics, twin or triple pack solutions are usually the best options. They are simple to mix and only require a few materials: a container to mix them in, a dedicated measuring cup, and a stirrer. If your mixing container has a lid, you don’t even need a stirrer, as you can just shake it up. The measurement is usually 3.5 mL of each concentrate per liter. Make sure to double-check the mixing instructions on the bottle, though.
Depending on the size of your system, for example, with a large scale Ebb and Flow setup, you may want to mix your nutrient solution in very large quantities. Drums that are 55 gallons make ideal mixing buckets for large systems and can store enough nutrient solution to replenish your reservoir for weeks. For smaller systems, or if you do not have space for a large mixing container, it is perfectly okay to mix your solution on an as-needed basis.
After mixing your solution, let it sit for a few minutes and settle, then check the pH and adjust as necessary. Starting off with a perfect pH will make it easier to maintain. You can even measure the number of drops of pH Up or pH Down needed every time you mix your solution, and just add that amount to the water before mixing in your concentrate.
By Christina D’Anna | the Spruce | Oct 14, 2019