Potassium Humate and Silicate Combined with Compost Application to Reduce the Harmful Effects of the Irrigation Water Salinity on Potato Plants and on the Soil Available Nutrient Npk

Abstract

Afield experiment was conducted to evaluate the effect of two compounds of potassium humate and silicate, combined with compost to decrease the harmful effects of water salinity on potato crop yield and quality, also, the soil available nutrient NPK. The main plots were assigned for the irrigation treatments; 0.5 (W1), 2.25 (W2) and 5.7 ds m (W3). The sub-plots treatments were; F0 (without compost applying), F1 (compost applying to soil), F2 (compost applying to soil plus foliar spraying by potassium silicate solution (10 cm.L) ), F3 (applying compost to soil plus coated tubers with potassium silicate, F4 (compost applying to soil plus foliar spraying with potassium humate) and F5 (compost applying to soil plus coated tubers with potassium humate) . The findings demonstrated that the majority of vegetative growth characteristics, tuber quality and tuber yield were impacted by increasing the salinity of irrigation water in both seasons. Spraying potato plants twice with potassium humate or silicate solutions had a notable positive impact on all of the studied characteristics. Comparing to the control treatment, results showed spraying potassium silicate had a high significant influence on growth characters, yield and yield components of potato in both seasons. It could be concluded that, spraying potato plants twice with potassium silicate solution in the presence of the applied compost to the soil ( F2 ) is the most efficient treatment for reducing the harmful effects of irrigation water salinity on potato and yield quality, and improving the available nutrient levels, NPK, in the soil