YIELD AND GRAIN QUALITY OF WINTER RYE DURING LONG-TERM APPLICATION OF FERTILIZERS IN CROP ROTATION ON SOD-PODZOLIC LOAMY SOIL
The results of studies on the effect of increasing doses of mineral fertilizers and their different combinations on the productivity of winter rye on soddy-podzolic loamy soil in the Smolensk region. The highest productivity of winter rye was obtained under favorable conditions in 1987 and 2009. on with the application of 40-60 kg / ha of nitrogen content in the plow layer of 100...150 mg P<sub>2</sub>O<sub>5</sub> on the background of 50...80 mg K<sub>2</sub>O per kg of soil. Further increase in doses of nitrogen fertilizers and supplies available phosphorus in the soil was impractical. Decreased yields of winter rye in 1988, 1989 and 2008 due to the impact of weather conditions on the execution of grain. Grain quality of winter rye was determined doses of nitrogen fertilizer and weather conditions during loading and maturation. With increasing doses of nitrogen to 160 kg / ha of crude protein content in grains of rye increased by 22,2 %. Established that between the crude protein content in grain of winter rye and the amount of total nitrogen in plants in the initial phases of their development are closely correlated. The obtained regression equation can predict the likely level of protein content of grain.