Theoretical and Experimental Analyses of Nutrient Control in Electrical Conductivity-Based Nutrient Recycling Soilless Culture System

Electrical Conductivity of Nutrient Solution, Plant Growth and Fruit Quality of Soilless Grown Tomato

Tomato plants (cv. Naomi) were grown until the 8 cluster in a greenhouse during Aug. 1998 – Jan. 1999 using a closed sub-irrigated soilless system. Plants were raised in pots (10 L) filled with peat and pomice (1:2 v:v) substrate. Forty days after transplanting 3 nutrient solutions (NS) with electrical conductivity (EC) of 2, 4, and 6 dS/m were applied to the plants. The ECs were achieved by pr...

Effect of Different Nutrient Solutions on The Yield, Chemical Composition and Nitrate Accumulation of Lettuce in Soilless Culture System

An experiment was conducted to select the optimum nutrient solution for growing lettuce (Lactuca sativa L.) under hydroponic conditions (open system) and Shahrekord climate, as a completely randomized design with five different nutrient solutions and three replicates, in Shahrekord University. The nutrient solutions were: 1) Research Station for Floriculture and Greenhouse Vegetables (the Nethe...

Plant nutrient uptake in recirculation culture of tomato under growth stage based electrical conductivity adjustments

* Corresponding author ([email protected]) Abstract: Recirculation (closed) type hydroponics, despite its comparative eco-friendliness and cost-effectiveness, is less popular in greenhouse agriculture due to the need for close monitoring of nutrient availability within the fertigation cycle. As a practicable and low cost measure, the uptake volume based supplementation of plant nutrients at hi...

In situ determination of slurry nutrient content by electrical conductivity.

Land application of animal slurries has both agronomic and environmental implications. It can be supported by the quantification of available nutrients in the field. A prototype device for indirect measurement of the nutrient content of slurry based on electrical conductivity (EC) was calibrated on manure samples collected from farms with different livestock typologies. The resulting correlatio...

Computer Program for the Calculation of Nutrient Solutions Used in Soilless Culture