Effects of Different Fertilizer Application Rates on Yield and Its Components of Hybrid Rice

The effects of 3 fertilizer application rates on yield and yield components of 2 Hybrid rice varieties were studied. The results showed that tiller and effective panicle number has positive correlation with yield for Yueyou 589, effective panicle number and seed setting rate has positive correlation with yield for Hongtaiyou 996, however, spikes per panicle has negative correlation with yield for both varieties. No significant yield differences under 3 fertilizer application rates, with increase of fertilization, yield of Yueyou 589 has an increasing trend, but yield of Hongtaiyou 996 was decreased at first, and then increased.