Влияние агрохимических свойств дерново-подзолистой супесчаной почвы и калийных удобрений на урожайность и качество зерна ячменя | Influence of agrochemical properties of sod-podzolic loamy sand soil and potash fertilizers on productivity and quality of barley grain
2012
Putyatin, Yu.V. | Bogdevitch, I.M. | Tavrykina, O.M. | Dovnar, V.A. | Tretyakov, E.S. | Markevich, D.V., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
In course of the research there was studied efficiency of various doses of potash fertilizers at various acidity levels and content of exchangeable calcium and magnesium in sod-podzolic loamy sand soil on productivity and quality of barley (Hordeum vulgare) grain. The research was realized in the conditions of the Republic of Belarus in Khojniki district. As a result of realized stationary experiment on sod-podzolic loamy sand soil with barley it was revealed that the maximum grain yield and cross output of protein from area unit have been grown on a variant with N60P60K180 application on the background of pH (KCI) - pH 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 (KCI) – 6.5-6.9) profitability of mineral fertilizers application was higher, than on soil with pHKCI 5.5 and the content of 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 pH 6.9 and the content of exchangeable Са 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.
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