Nutrients

Displaying 1 - 30 of 32

📄 Study on rapid detection of nutrient content of hydroponically grown lettuce cultivars

Profile picture for user Elsewhere
Submitted by Elsewhere on 2021-Jan-22 Fri 08:45

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,…

📄 Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System

Profile picture for user Elsewhere
Submitted by Elsewhere on 2021-Jan-06 Wed 05:00

The atomized nutrient solution droplet sizes and spraying intervals can impact the chemical properties of the nutrient solution, biomass yield, root-to-shoot ratio and nutrient uptake of aeroponically cultivated plants. In this study, four different nozzles having droplet sizes N1 = 11.24, N2 = 26.35, N3 = 17.38 and N4 = 4.89 µm were selected and misted at three nutrient solution spraying intervals of 30, 45 and 60 min, with a 5 min spraying time. The measured parameters were power of hydrogen (pH) and electrical conductivity (EC) values of the nutrient solution, shoot and root growth, ratio of roots to shoots (fresh and dry), biomass yield and nutrient uptake. The results indicated that the N1 presented significantly lower changes in chemical properties than those of N2, N3 and N4, resulting in stable lateral root growth and increased biomass yield. Also, the root-to-shoot ratio significantly increased with increasing spraying interval using N1 and N4 nozzles. The N1 nozzle also revealed a significant effect on the phosphorous, potassium and magnesium uptake by the plants misted at proposed nutrient solution spraying intervals. However, the ultrasonic nozzle showed a nonsignificant effect on all measured parameters with respect to spraying intervals. In the last, this research experiment validates the applicability of air-assisted nozzle (N1) misting at a 30-min spraying interval and 5 min of spraying time for the cultivation of butter-head lettuce in aeroponic systems.

Negative effect of sodium on peppers is demonstrated

Profile picture for user Elsewhere
Submitted by Elsewhere on 2021-Jan-04 Mon 13:30

Next year, Van der Knaap Groep and Wageningen University & Research will start a new trial. The trial will examine the negative effect of sodium on the production and quality of pepper crops.   Van der Knaap has developed a sodium remover that complies with the new regulations for 2026. “We want to demonstrate the benefits…

📄 Effect of grafting and harvest stage on the quality of black cherry tomatoes cultivated in Vietnam

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-18 Fri 11:15

Black cherry tomato is an important source of nutraceutical compounds; however, the quality of fruits depends on the cultivation technique and maturity stage at harvest. In a recent study, the physical and chemical properties of non-grafted and grafted tomatoes (Solanum lycopersicum cv. OG) were…

📄 The interaction between salinity and nutrient solution temperatures

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-14 Mon 08:45

A large number of studies on salinity in hydroponic systems have been carried out, but few of them have evaluated the interaction between salinity and nutrient solution temperatures. In Brazil, two experiments were carried out in a randomized block design from January to February (Experiment I) and June…

📄 Evaluation of a Legume-Derived Protein Hydrolysate to Mitigate Iron Deficiency in Plants

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-10 Thu 05:00

Biostimulants play an important role in the development of management practices able to reach adequate productivity to meet the food demand of a growing world population, while following a sustainable agriculture model. This work aims to evaluate the effect of a protein hydrolysate derived from legume seeds by enzymatic hydrolysis on plant growth and also to verify its ability to mitigate Fe deficiency, a widespread problem significantly limiting plant growth and crop productivity. Experiments were performed with tomato (Solanum lycopersicum L.—cv. AKRAI F1) and cucumber (Cucumis sativus L.—cv. EKRON F1). The plants were grown hydroponically under adequate or limited Fe supply. Changes in shoot and root fresh weight, leaf relative chlorophyll content and the accumulation of macro- and microelements in shoots and roots were measured. Plant ability to cope with Fe deficiency was measured by evaluating the activity of root Fe3+-chelate reductase. Our results indicate that the foliar treatments with the protein hydrolysate did not significantly affect growth parameters when plants were grown in full nutrient solution. However, the biostimulant was able to improve the growth performance of Fe-deficient plants. Therefore, the protein hydrolysate can be a powerful tool to stimulate crop growth under Fe-deficient environments, leading to reduced fertilizer inputs with related environmental and economic benefits.

Advanced liquid nutritional and crop enhancement product launched

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-09 Wed 11:15

BioSafe Systems is launching a new product, CalOx FT, an advanced liquid nutritional and crop enhancement product for a wide range of agricultural and horticultural crops. The unique, patented CaT technology in CalOx FT to improve calcium mobility and distribution beyond traditionally applied calcium…

📄 "Tomato plants do not need all nutrients at once for quality fruits"

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-08 Tue 13:30

Fertigation is considered an efficient alternative to the enhanced use of chemical fertilizers. Since most of the fertigation systems rely on a theoretical electrical conductivity value of the nutrient solution, a team of Romanian researchers tried to evaluate if this is the real need of the plants as…

📄 Effects of Nutrient Solution Irrigation Quantity and Downy Mildew Infection on Growth and Physiological Traits of Greenhouse Cucumber

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-08 Tue 03:43

Abiotic and biotic stresses both decrease the quality and quantity of cultivated plants. In this study, in order to see the responses of cucumber plants to drought stress and cucumber downy mildew infection, downy mildew infestation at different two levels, B1 (disease infestation) and B2 (no disease infestation), along with three fertigation requirement levels, full fertigation T1, moderate nutrient solution deficit T2 and severe nutrient solution deficit T3, were applied in a greenhouse. Thus, six treatments, i.e., B1T1, B1T2, B1T3, B2T1, B2T2 and B2T3, were set. The leaf gas-exchange parameters were significantly increased under CK (control experiment, B2T1: no disease infestation and full irrigation) treatment, and leaf photosynthesis rate, transpiration rate and stomatal conductance were significantly decreased under the B1T1 treatment. Leaf intercellular CO2 concentration was significantly increased under B1T1 treatment. Leaf photosynthesis rate, transpiration rate, intercellular CO2 concentration and stomatal conductance were significantly decreased under B1T2, B1T3, B2T2 and B2T3 treatments. Compared with treatment CK (B2T1), the plant height of cucumber under B1T1, B1T2, B1T3, B2T2 and B2T3 treatments decreased by 11.41%, 19.05%, 27.48%, 7.55% and 10.62%, respectively; the stem diameter of cucumber under B1T1, B1T2, B1T3, B2T2 and B2T3 treatments decreased by 5.70%, 13.45%, 23.03%, 9.46% and 15.74%, respectively; and leaf area of cucumber under B1T1, B1T2, B1T3, B2T2 and B2T3 treatments decreased by 22.79%, 38.68%, 58.28%, 13.76% and 29.96%, respectively. The root–shoot ratio of cucumber under B1T1, B1T2, B1T3, B2T1, B2T2 and B2T3 treatments was 3.16%, 2.99%, 4.11%, 3.92%, 3.13% and 3.63%, respectively. The root–shoot ratio of cucumber was the highest under the B1T3 treatment.

📄 Tomato Crop Performances under Chemical Nutrients Monitored by Electric Signal

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-04 Fri 13:22

Fertigation is considered an efficient alternative to the enhanced use of chemical fertilizers. Since most of the fertigation systems rely on a theoretical electrical conductivity value of the nutrient solution, we tried to evaluate if this is the real need of the plants as well as if all the nutrients are needed at once. Therefore, we analyzed the electrical signals of the nutrients applied individually or in different mixes, correlating the electrical signals with the leaf gas exchange processes, studying the relation between the electrical signals and different plant phenological stages and the influence of the treatments on the lycopene content, nutritional composition, and antinutritional factors as well as the mineral bioavailability of tomato fruits cv. Brillante F1. The study was carried out in a greenhouse under controlled conditions. Ten different treatments consisting of MaEs (major elements) (V1—MgSO4, V2—KNO3, V3—K2SO4, V4—Ca(NO3)2, V5—KH2PO4, V6—KCl, V7—MgSO4 + KNO3 + KH2PO4, V8—K2SO4 + Ca(NO3)2 + KCl, V9—the mix of V1 to V6, commonly used in agricultural practices, V10—one nutrient each day) were applied daily when plants were 42 days old. The results showed that the values of the electrical signals varied depending on the treatment and the plant phenological stage. Five different trends of the electrical signals were identified. In addition, the shape of the signals varied during the day in accordance with the photosynthesis and the amount of CO2 registered. The results of the treatments’ influence on the nutritional composition and lycopene content of tomato fruits suggested that plants do not need all the nutrients at once; the highest values are registered for K2SO4 fertilization. However, this fertilizer also had the highest registered tannin, saponin, and trypsin inhibitors content, constituting a disadvantage considering the high nutritional values and lycopene content. Regarding the bioavailability of zinc, calcium, and iron for the human diet, regardless of the treatment applied, phytic acid did not affect the availability of zinc and calcium, but it had a negative impact on iron availability; also, the amount of oxalate could impair the bioavailability of calcium. The study suggests that tomato plants do not need all nutrients at once for quality fruits. However, further studies are needed in order to develop a fertigation scheme based on a smart nutrient use that provides an improved nutritional composition and mineral bioavailability. In addition, it is necessary to evaluate the influence of treatments on yield.

📄 Improving nutrient and water use efficiencies in multi-loop aquaponics systems

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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…

Function and Management of Potassium in Hydroponics

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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?

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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…

Plant nutrients and food quality in vertical farming

Profile picture for user Elsewhere
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

Profile picture for user Elsewhere
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…

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

Profile picture for user Elsewhere
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…