Effects of Fertilization on the Growth Dynamics and Spike-grain Structure in Rice

The objective of the research was to provide theoretical basis for scientific fertilization of rice.Different fertilization combinations were designed to observe the growth dynamic and spike-grain structure of rice.The effects of different fertilization treatments on total tiller number were very obvious.Under the circumstance that the other conditions were same,the peak tiller numbers rapidly increased along with N fertilizer increasing and decreased linearly along with P fertilizer increasing.K fertilizer had nonlinear relationship to the peak seedlings number and the leaf area coefficient nearly performed line relationship to N fertilization.Scientific collocation with N,P and K could obtain perfect growth state.Nitrogenous fertilizer was the most important for increasing effective spikes.On the premise of constant N and K fertilizers,the yield increased rapidly along with P2O5 increasing.When the application mount of N and P fertilizers were completely same,the yield increased along with K2O increasing.The combination with 232.50 kg/hm2 N,75.00 kg/hm2 P2O5 and 150.00 kg/hm2 K2O was scientific and reasonable.