THE DEPENDENCE OF THE ACTIVITY OF PHOTOSYNTHESIS AND SYMBIOTIC-TION ACTIVITIES OF LEGUMES FROM THE INFLUENCE OF PHOSPHATE FERTILIZERS

In article results of researches on studying of influence of various doses of phosphorus fertilizers on symbiotic activity and AK-ciency of photosynthesis of legumes. The formation of symbiotic apparatus and its activities is better when elevated levels of phosphorus in the soil. In these conditions, the more intense is the nitrogen fixation, and increased the proportion of fixed nitrogen from the air. Photosynthetic activity of plants of leguminous cultures also over-hangs the level of availability of soil phosphorus. Its content in the aboveground biomass may be in the range of 0.57 to 1.0 % dry substance. Therefore, during the growing season, grain legumes, especially soybeans, consume a lot of phosphorus, and on the background of phosphate fertilizers increases the need for other nutrients, in particular nitrogen.