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Mediterranean areas with intensive agriculture are characterized by high salinity of groundwater. The use of this water in hydroponic cultivations can lead to nutrient solutions with an electrical conductivity that overcomes the tolerance threshold of many vegetable species. Plant growth-promoting rhizobacteria (PGPR) were shown to minimize salt stress on several vegetable crops but the studies on the application of PGPR on leafy vegetables grown in hydroponics are rather limited and have not been used under salt stress conditions. This study aimed to evaluate the use of plant growth-promoting bacteria to increase the salt tolerance of leaf lettuce grown in autumn and spring in a floating system, by adding a bacterial biostimulant (1.5 g L−1 of TNC BactorrS13 a commercial biostimulant containing 1.3 × 108 CFU g−1 of Bacillus spp.) to mineral nutrient solutions (MNS) with two salinity levels (0 and 20 mM NaCl). Leaf lettuce plants showed a significant reduction of growth and yield under salt stress, determined by the reduction of biomass, leaf number, and leaf area. Plants showed to be more tolerant to salinity in autumn than in spring.

It is important to conduct water and nutrient solution analyses on a regular basis to ensure hydroponic tomatoes are receiving the proper level of nutrients. Making sure that hydroponically-grown tomatoes receive the proper nutrient levels requires testing water and nutrient solutions. Growers also need…

Research by A. Richa, S. Touil and M. Fizir highlights the recent developments in the treatment of hydroponic wastewater. The rapid development of hydroponic farming produces a large amount of wastewater rich in nutrients and organic matters thus imposes great harm to humans and the environment if the…

By Karla Garcia  Silicon (also known as silica, Si) is found in high quantities in open field production but is absent in hydroponic nutritional recipes. The lack of knowledge about the role of silicon (Si) in horticultural crops became apparent when using soilless / hydroponic systems.  Research has demonstrated that silicon is one of the […]

Give a man a fish and he’ll eat for a day. Teach a man to fish, and he’ll eat for a lifetime.

With that idea in mind, GR365N (pronounced Green 365) was created. The social enterprise aims to teach individuals how to grow fresh food in hydroponic systems allowing them to access fresh food 365 days a year with minimal growing costs.

With COVID affecting food production, team members Dan Atkinson and Colin McVicker believe hydroponic farming this isn’t the future of food production, rather, it is the present. 

The way the system works is simple. Seedlings are placed in vertical posts that contain plastic substrate. The main water tank pumps water through the entire system and trickles down into the posts leading the plants to grow out horizontally on vertical posts using LED lights, no soil and 95 per cent less water than farms. 

Hydroponic farming is a method of growing plants without soil, using mineral nutrient solutions in a water solvent. Hydroponics can rapidly help serve unmet demands for fresh organic vegetables, grown close to their market. To certify soil for organic farming after its been used in conventional farming…

Whether talking about nutrient film technique (NFT), deep water culture (DWC), drip irrigation systems, aeroponics systems, ebb and flow systems, or any other system we should agree that these are all just variations of irrigation systems. Suppliers of hydroponic systems will all tell you why theirs is…

LED red (R) and blue (B) continuous light (CL) is a potential efficient way to increaseplant productivity of plant factory with artificial light (PFAL), but limited information wasexplored about their effects on plant mineral nutrition. In an environmentally controlled plantfactory with artificial light (PFAL), the effects of CL of different intensities and spectral qualities,emitted by R and B LEDs on growth and nutrient element content and accumulation of lettuce(Lactuca sativa L.), were conducted in three hydroponic experiments. Two treatments, normal light(12 h/12 h) and CL (24 h/0 h) in experiment 1, three CL intensities (100, 200 and 300 μmol∙m−2∙s−1) inexperiment 2, and three CL light qualities (1R:3B, 1R:1B and 3R:1B) in experiment 3 weredesigned. The results showed that CL significantly increased the fresh and dry lettuce shootbiomass compared with normal light, and shoot fresh and dry biomass increased with theintensity increment of CL. In experiment 3, shoot fresh biomass was great under high R lightproportion CL treatment, while dry shoot biomass remained unchanged. Both CL and CL withincreased intensities promoted shoot C content and accumulation in lettuce. CL reduced N, P, K,Ca, Mg, Cu and Zn contents in lettuce shoot, while Fe and Mn contents did not change comparedto NL. Moreover, CL increased Ca, Fe and Mn accumulation.

In a legal battle over what constitutes organic farming, a federal judge signaled Thursday he is unlikely to find a 1990 law forbids labeling hydroponic and other crops not grown in soil as organic. Joined by organic farmers and trade groups, the Center for Food Safety sued the U.S. Food and Drug…

The analyses of online quality measurements of four lettuce cultivars (Rex, Tacitus, Black Seeded Simpson, Flandria) using hyperspectral image processing techniques have been studied. Seedlings were planted in Rock-wool cubes and fed for 3 weeks using hydroponic nutrient solution containing 0, 50, 100,…

Last year Van der Knaap Groep performed two different trials with hydroponic lettuce. Karel de Bruijn: “We used mineral nutrients in one pond and organic in the other. Last year's trial was successful. The filtration system did its job. The membranes ensure the bacteria can't pass through. That's why our…

Fortunately and unfortunately there are so many ways to manage pathogens in a hydroponic nutrient solution. Having options is great but these options can be difficult to navigate for new growers. Hopefully this overview comparing three popular management styles makes it easier to understand the tradeoffs…

Tips on managing disease in your hydroponic system - mailchi.mp/urbanagnews/d3…

With hydroponics and vertical farming gaining popularity around the world, growers are increasingly interested in finding crop varieties with a proven track record in controlled environment system. To meet this, Vilmorin-Mikado has positioned itself as a leader in plant breeding and the provision of…

Important Tips for Designing a Hydroponic Production Facility - mailchi.mp/urbanagnews/d3…

This is an excellent education video Food Safety for Hydroponic growers/ youtu.be/JvHJSOLN5qk via @YouTube

The beneficial effects that silicon (Si) has on plant growth as well as resistance to biotic and abiotic stresses have been well documented for many crops in recent years. However, few studies focus on the effects of Si on plant growth during the propagation stage of strawberry (Fragaria × ananassa, Duchesne). This study was conducted to investigate the optimal method for Si application during the cutting propagation of strawberry in soilless cultivation. Strawberry mother plants were supplied with Si through foliar spray, runner spray, or root drench before the cutting propagation, then half of the daughter plants in each treatment received continued Si supply through foliar spray or through root drench after the cutting propagation. The results showed that the plant height, petiole length and diameter, leaf length and width, shoot fresh and dry weights, and root fresh and dry weights were significantly increased by Si root drench both before and after the cutting propagation. Moreover, plants absorbed more Si by drench than by spray, and the absorbed Si was only able to be transported from the root to the shoot, and from the mother plant to the daughter plant.

Dr. Paul Fisher from the University of Florida IFAS Extension interviews Shawn Mallen from A.M.A. Horticulture in a new YouTube video where they discuss the different commercial substrates most commonly used in hydroponic production, the importance of air porosity, and compaction of substrates. This video…

Van der Knaap is known for their 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…

According to the UN, the world is on the brink of its worst food crisis in 50 years. The global food industry is searching for a more sustainable and accessible system for producing healthy food, particularly fresh fruit and vegetables. Techniques such as hydroponics and vertical farming may provide the…

500Foods shared this story from HD.com. Plantlogic is focused on designing solutions for substrate production that will increase the health of plants and enable growers to adequately fertigate their crops. With these goals in mind, Plantlogic presents its newest, innovative product for hydroponic production of vegetables. The "Kratos" is aimed…

June 30, 2020 was an exciting day for local Connecticut organization, New Opportunities. After years of planning, ground was broken on a new hydroponic farm project called "CT Food4Thought" that is going to bring fresh, nutritious, pesticide free food to local food banks, shelters, soup kitchens, and…