CLOVER PRODUCTIVITY (TRIFOLIUM PANNONICUM JACQ.) ACCORDING TO THE MINERAL NUTRITION IN THE CONDITIONS OF MIDDLE VOLGA AREA
The article deals with the cultivation technology of perennial leguminous grasses. In the technology of cultivation of perennial leguminous grasses the most effective way of controlling the processes of yield formation is the optimization of mineral nutrition. The authors have investigated the influence of mineral fertilizers on the productivity of clover Pannonian. It has been established by the authors that the highest yield of fodder units of digestible protein and energy was obtained when making fertilizer dose N60P90K120. The greatest amount and mass maximum of tubers were formed when applied P <sub>90</sub> K <sub>120</sub>. In sum for two years clover plants Pannonian was recorded to fix up to 99.5...150,5 kg/ha of nitrogen from the air. On the background of N60Р90К120 assimilative surface has increased by 52 %, the share of biological nitrogen in the yield has increased to 57.3 %.