Effects of Nitrogen Regulation on Panicle Traits,Lodging Resistance and Yield of Hybrid Rice Seeding-throwing Culture

Effects of nitrogen application models on panicle traits,lodging resistance and yield of hybrid rice seeding-throwing culture were studied under the total nitrogen fertilizer(600 kg/hm2).The results showed that effective panicle number increased along with the ratio of basal fertilizer decreasing and tillering fertilizer increasing.Panicle length,primary branches and secondary branches increased,however,lodging resistance decreased along with the ratio of basal fertilizer and tillering fertilizer decreasing.Low ratio of basal and tillering fertilizer to spikelet fertilizer resulted in yield dropped.The treatment of basal,tillering,booting and spikelet fertilizer as 3:2:1:0 had the highest yield reached 11526 kg/hm2,and 20.43% higher than the control.Therefore,the appropriate nitrogen fertilizer ratio of basal,tillering,booting and spikelet fertilizer were 3:2:1:0 for hybrid rice seeding broadcasting