Эффективность применения эндофитных биопрепаратов и азотного удобрения

The results of studies about the biological preparations of endophytic bacteria effect on the spring wheat grain productivity with different backgrounds of mineral nutrition are presented. With the inoculation of spring wheat seeds with the endophytic bacteria BP2 biopreparation on a background without nitrogen and the introduction of N45 irrespective of the weather conditions, the grain yield increased, which is probably due to an increase in the availability of nitrogen and plants resistance to the stressing environment. The biopreparation BP1 effect varies from year to years of the research and the mineral nutrition backgrounds. A positive effect was noted on the phosphate-potassium fertilizers application, which was expressed in the grain yield increase in the on average by 25%.Under the nitrogen fertilizer application the yield increasing was noted in insufficient precipitation conditions in the first half of May 2015. The Extrasol using only on a nitrogen-free background was contributed to an increase in yield on average by 26%. Combined application of the nitrogen fertilizer in a dose of 45 kg per ha and endophytic bacteria biological products allows to increase the spring wheat grain productivity by 1.6-2.1 times.