Displaying 1 - 19 of 19

đź“„ Improving nutrient and water use efficiencies in multi-loop aquaponics systems

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Submitted by Elsewhere on 2020-Nov-27 Fri 09:49

The sustainable development of agricultural systems where nutrients and water are recycled to a high degree is of enormous importance. Traditional aquaponics, where fish and plants are cultivated in one recirculating system, addresses these ecological challenges, but still struggles with its economical…

📄 Critical Leaf Magnesium Concentrations for Adequate Photosynthate Production of Soilless Cultured Cherry Tomato—Interaction with Potassium

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Submitted by Elsewhere on 2020-Nov-26 Thu 12:41

Magnesium (Mg) is essential to many plant physiological and biochemical processes; however, understanding how Mg nutrition quantitatively affects the production, partitioning, and utilization of photoassimilates is still lacking, especially in soilless culture systems. We focused on the roles of Mg in yield formation and interactions with potassium (K) nutrition of cherry tomato. Cherry tomato yield, photosynthetic parameters, dry matter weight, and K, Mg, and calcium (Ca) uptake were investigated in two soilless experiments with seven Mg levels and five K levels. The results showed that low (<1 mM) and high (>4 mM) Mg supply limited cherry tomato yield by decreasing dry matter accumulation by22.6–78.1% and harvest index by 13.9–40.7%. The critical leaf Mg concentrations required for adequate photosynthate production in the first and second harvest periods were 4.67 and 5.52 g·kg−1, respectively. However, over-supply of Mg reduced leaf K and Ca concentrations and limited plant uptake of K and Ca. Moreover, adjusting K concentrations in solution could influence plant Mg functions in photosynthesis and, therefore, cherry tomato growth. Overall, balanced Mg and K application increased Mg, K, and Ca uptake, as well as Mg concentrations in leaves, which could maintain a sustainable photosynthetic rate and plant dry matter formation.

Nutrisense: A decision support system to calculate and readjust hydroponic nutrient solutions

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Submitted by Elsewhere on 2020-Nov-02 Mon 13:20

The management of nutrition in soilless cultivations poses serious difficulties to growers, because the calculation of the fertilizers needed to prepare a nutrient solution requires a good background in chemistry and is time consuming. Multiple factors affect the composition of a nutrient solution.…

The Role of Silicon as a Nutrient in Hydroponic Recipes

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Submitted by Elsewhere on 2020-Oct-22 Thu 21:42

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 […]

Lettuce in a hydroponic system: 100% organic nutrients

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Submitted by Elsewhere on 2020-Oct-08 Thu 11:01

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…

Automated nutrient delivery systems and how they work

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Submitted by Elsewhere on 2020-Oct-01 Thu 10:51

Automated nutrient delivery systems can be expensive, and sticker shock can intimidate growers into putting off the upgrade. However, the vast majority of growers admit that the upfront investment pays off. Lower labour costs and reduced resource waste, along with saving time are enough to get many…

Function and Management of Potassium in Hydroponics

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Submitted by Elsewhere on 2020-Sep-30 Wed 15:46

Potassium is recognized as a nutrient required to keep good quality in our plants and fruits. This nutrient has a huge impact on many plant processes due to its function as enzyme activator. Also, potassium has a strong role in stomata opening and closure due to its function as an osmotic regulator.  […]

Texas Tech, Nanjing Agricultural Research Teams Make Plant Nutrient Delivery Breakthrough - Seed World

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Submitted by Elsewhere on 2020-Sep-18 Fri 12:14

When most people think of fungi, the thoughts are usually not good, turning to something that does damage more than those that are actually helpful.

Yet, fungi play a critical role in the growth and development of plant life and have for millions of years. Scientists have known for a long time that arbuscular mycorrhizal (AM) fungi that live in harmony with about 90% of land plants and play a key role in their root systems, are responsible for carrying needed phosphate to plants to help growth.

Now, however, thanks to a discovery by a team of scientists from Texas Tech University’s Institute of Genomics for Crop Abiotic Stress Tolerance (IGCAST) in the Department of Plaint and Soil Science, and the Nanjing Agricultural University’s State Key Laboratory of crop Genetics and Germplasm Enhancement, that symbiotic role may go even further.

That research team, which included professor Guohua Xu, Prof. Aiqun Chen and Dr. Huimin Feng from Nanjing Agricultural University and, Luis Herrera-Estrella, the President’s Distinguished Professor of Plant Genomics and director of IGCAST, and assistant professor Damar López-Arredondo, discovered that AM fungi also acted as a supplier of nitrogen to the plant, the protein (NPF4.5) responsible for transporting nitrates from the fungi to the plant, and that this symbiotic nitrate pathway and the function of the protein are present in crops such as rice, and probably most other plant species.

Nutrient solution analysis projects for greenhouses and vertical farms

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Submitted by Elsewhere on 2020-Sep-10 Thu 10:25

The quality of water and nutrient solution used in controlled environment agriculture (CEA) production systems, such as greenhouses and vertical farms, is one of the most important factors that affect plant health and yield. Growers monitor water and nutrient solution quality by sending samples for…

Greenhouse, outdoor, or indoor: Which kale is healthiest?

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Submitted by Elsewhere on 2020-Sep-08 Tue 10:12

Urban populations have plenty of access to calorie-dense, nutrient-poor foods. In order to move to a healthier diet, however, they need access to vegetables and other micronutrient-dense foods, according to Danish economist Per Pinstrup-Andersen, who says it's time to take vertical indoor farming…

The development of an online indicator related to plant nutritional aspects

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Submitted by Elsewhere on 2020-Sep-03 Thu 09:28

Electrical conductivity of the growing media or drainage indicates the nutritional conditions in the cultivation system. However, the nutrient uptake phenomenon has not been related well to the soilless culture system. In a recent study, there is reported on the design, theoretical analyses, and…

Liquid nutrient supplement optimizes growth performance of leafy greens

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Submitted by Elsewhere on 2020-Aug-27 Thu 09:23

Oasis Grower Solutions introduces Fortify, a liquid nutrient supplement, designed to optimize the growth performance and increase harvest weights while reducing production time by up to 20%. Fortify is an amino acid based nutrient supplement developed through extensive research and trials. Use of Fortify…

Overview of mineralisation in an aquaponic system

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Submitted by Elsewhere on 2020-Aug-26 Wed 11:04

Aerobic mineralization is very similar to Aerated Compost Tea (ACT) or Actively Aerated Compost Tea (AACT) and is one of the easiest ways to grow more plants using less fish in aquaponic or aquaculture systems.  You may already have heard of ACT or ACCT being used in the soil systems thanks to the hard work…

Plant nutrients and food quality in vertical farming

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Submitted by Elsewhere on 2020-Aug-25 Tue 09:11

Kristian Holst Laursen, University of Copenhagen, Department of Plant and Environmental Sciences will talk about plant nutrients and food quality in vertical farming at the online vertical farming conference, October 8 from 10:00 - 14:30 CEST.  In vertical farming, plants are often grown hydroponically or…

New biofortification method that transforms leaves into nutrient stores

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Submitted by Elsewhere on 2020-Aug-19 Wed 10:21

A new collaborative study led by researchers from the Spanish National Research Council (CSIC) at the Centre for Research in Agricultural Genomics (CRAG) in Barcelona and the Institute for Plant Molecular and Cellular Biology (IBMCP) in Valencia describes a promising strategy to improve the nutritional…

Integrated plant nutrient management system

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Submitted by Elsewhere on 2020-Aug-13 Thu 10:06

All growers know that a successful operation needs to have plans and procedures in place. The first thoughts that pop up when talking about plans and procedures may revolve around planting schedules, harvest dates, pest management, and overall safety procedures for staff and customers. However, there is…

Learn in depth aspects of plant nutrition management in these Training Online courses

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Submitted by Elsewhere on 2020-Aug-12 Wed 09:34

Train yourself and your staff to make better crop management decisions by learning in depth aspects of plant nutrition management. Nutrient Management 2 (Advanced) is the third course of the award-winning Greenhouse Online Training courses offered by the University of Florida IFAS Extension. This course…

Plant-based fertilizers on par with conventional fertilizers in lettuce

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Submitted by Elsewhere on 2020-Aug-11 Tue 09:38

Growing lettuce on water Biota Nutri's 100% plant-based fertilisers gives the same yield and quality as using conventional fertilisers. This was shown by a series of tests conducted at the HAS University of Applied Sciences in 's-Hertogenbosch, the Netherlands. Left: conventional fertilizers; right:…

Growing media and the efficient use of nutrients

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Submitted by Elsewhere on 2020-Jul-10 Fri 11:01

A recent whitepaper from Grodan discusses growing media and the efficient use of nutrients.  One of the 15 global challenges formulated by the Millenium project is “How can population growth and resources be brought into balance?" One aspect of this challenge is improving the use efficiency of the global resources…