Statistics and kinetics of soil nitrogen status changes and yield of grain crops under influence of slow soluble nitrogen fertilizer

According to the results of long term researches in micro field experiments on grey forest soil represented unfold statistic panorama of soil nitrogen status change under influence of nitrogen annual applying of nitrate, ammonium and slow soluble fertilizers with differences in kinetic of this response. As well as in kinetic of formation nitrogen pool immobilization in soil with statistics assessment of grain crops yield as results function of soil nitrogen status change. Due to results the increase content of nitrogen in soil under influence of longterm soluble nitrogen fertilizer in comparison with quickly soluble forms of nitrogen fertilizers is established. Differences in response of soil nitrogen status on different of nitrogen liberation from fertilizers is represented in kinetic characteristics, which increased from long-term form to quickly soluble forms of nitrogen fertilizers: N slow soluble (k = 0. 010 day) ^ N ammonium form (k = 0.026 day) ^ N nitrate form (k = 0.034 day). Similar panorama installed by quantitative and kinetic parameters of nitrogen immobilization from long - term nitrogen form where its indicators exceeded similar assessment for quickly soluble forms of nitrogen fertilizers for sizes and velocity this process in nitrogen cycle.