Study on Effects of Nitrogen,Phosphorus and Potassium Fertilizer Application in Middle-season Rice

The effects of nitrogen,phosphorus and potassium fertilizer application in middle-season rice were studied in Fuan city during 2006 ~ 2008 through 3414 full-test design.The test results showed that the effects of nitrogen,phosphorus and potassium fertilizer on the yield of middle-season rice revealed the following order: nitrogen phosphorus,potassium.Regression analysis concluded that the optimum fertilization quantity was pure nitrogen 10.1 kg/667 m2,phosphorus fertilizer 4 kg/667 m2,potassium fertilizer 6.5 kg/667 m2.Under the best fertilization quantity condition,the yield of middle-season rice could reach to 518.1 kg/667 m2,and the economic benefit of fertilization was the best.