INFLUENCE OF AGROCHEMICAL PROPERTIES OF SOD-PODZOLIC LOAMY SAND SOIL AND POTASH FERTILIZERS ON PRODUCTIVITY AND QUALITY OF BARLEY GRAIN

Abstract

As a result of carry out of stationary experiment on sod-podzolic loamy sand soil with barley it is established, that the maximum grain yield and cross output of protein from area unit have been grown on a variant with N60Р60K180 application on the background of pH_(KCl) - рН 6,9 and exchangeable content Ca - 715 and Mg - 184 mg/kg with their equivalent ratio - 2,7. Efficiency of application of full mineral fertilizer increased with increase of pH index. The recoupment of mineral fertilizers an increase of grain yield with increase of potassium rates decreased slightly. On soils with reaction close to neutral (pH_(KCl) - 6,5-6,9) profitability of mineral fertilizers application was higher, than on soil with рН_KCl 5,5 and the maintenance exchange Ca - 548 and Mg - 135 mg/kg. Essential increase of the contents of critical and essential amino acids in barley grain was observed at neutralization of acid soil to level рН 6,9 and the content of exchangeable Ca 715 mg/kg, Mg 184 mg/kg and their ratio 2,7. The gain of amino acids in grain on limed backgrounds was provided for the most part at the expense of share increase of threonine, leucine and phenylalanine.