Determination of dependence between the content of protein in grain of winter wheat and parameter of fertility of soil

Abstract

The purpose. To elaborate methodical approach to determination of influence of parameters of soil fertility on the content of protein in grain of winter wheat on the basis of methods of mathematical processing experimental information of field experiments. Methods. Complex of mathematical tools of prospecting analysis, correlation coefficients at studied parameters, regression dependences of content of protein of winter wheat on parameters of fertility of soils, prognostic models of content of protein in grain using equations of growth curves, integrated parameter of the level of soil fertility and its influence upon the content of protein in grain of winter wheat. Results. On the basis of analytical calculations it is determined that change of content of protein in grain of winter wheat depends on change of content of nitrogen of nitrates, content of mobile forms of phosphorus and potassium in soil. In grain of wheat the forecast of content of protein is calculated for 3 nearest seasons. The level of joint influence of three parameters of soil on the content of protein in grain of winter wheat is specified. Methodical approach to mathematical processing the experimental information of field experiments on an instance of determination of dependences of influence of parameters of soil fertility on the content of protein in grain of winter wheat in conditions of steppe zone is developed. Conclusions. Levels are determined of dependence of content of protein in grain of winter wheat from parameters of soil fertility: high — from change of content of nitrogen of nitrates, average — from change of content of mobile potassium, low — from change of content of mobile phosphorus in soil. Forecast of change of protein in grain for the nearest season has a positive trend.