Effects of Shift Part of Nitrogen Fertilizer from Basal-tillering to Panicle Initiation on Grain Yield of Mid-season Hybrid Rice and Ratoon Rice

Effects of shift part of nitrogen fertilizer from basal-tillering to panicle initiation on grain yield of mid-season hybrid rice and ratoon rice were investigated with 20 rice combinations in two nitrogen application strategies. The results showed that the average grain yield of 20 hybrid rice combinations was higher than that of traditional fertilizing method. There were 5 combinations' grain yield of main crop rice and 9 combinations' grain yield of ratoon rice higher than traditional fertilizing method. Considered to the total yield of main crop rice and ratoon rice, there were 3 combinations' grain yield significant higher than traditional fertilizing method.