Abstract
The research purpose is to study the effect of systematic application of various doses of mineral fertilizers on productivity, grain quality, value of spring barley productivity elements, determine an optimal doses of nitrogen, phosphorus and potassium in the arid conditions of the Middle Volga region. Improving nutrition with the use of fertilizers contributed to an increase in productivity values. The average yield was 0.18–0.76 t/ha. The use of maximum doses of nitrogen, phosphorus and potassium did not increase productivity in arid conditions. Nitrogen plays a leading role in increasing barley productivity. The agronomic effectiveness of fertilizers depended on the doses of active substances. An increase was 2.1–5.8 kg of barley grain per 1 kg of active substances. The most stable increase was observed when applying N60Р0-60К0-30. Rational doses are as follows: nitrogen 60–90 kg a.e./ha when applying P60K30, phosphorus 30–60 kg a.e./ha when applying N60K30, potassium 30 kg a.e./ha when applying N60Р60. The best option is N60Р0-60К0-30.
Highlights
Spring barley is one of the most important food, feed and industrial crops
The solution to the problem of increasing and stabilizing grain production depends on the nutrition of plants
Over the past 35 years in the Volga region, the frequency of droughts has increased to 70 %, the share of springsummer and persistent droughts has increased [3,4,5]
Summary
The solution to the problem of increasing and stabilizing grain production depends on the nutrition of plants. A significant part of the crop is formed due to soil resources [1, 2]. The use of fertilizers allows plants to spend soil moisture more economically, reducing the stress of the climate, and increasing plant productivity [6, 7]. Due to the insufficient use of fertilizers, a significant part of soils of the Volga and Samara regions lacks basic elements of plant nutrition [8, 9]. To preserve and replenish soil resources and improve plant nutrition, it is necessary to use fertilizers
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