Effects of Amount of Nitrogen, Phosphorus and Potassium Fertilizer Application on Yield and Quantity of Rice

The effects of amount of nitrogen,phosphorus and potassium fertilizer application on yield and quantity of rice were studied in the paper by the method of plot isolated by plastic.The results showed that the high yield were obtained in treatments which amounts of three fertilizers application were as follows: 240 kg/hm2 of nitrogen(economical utilizing amount was 160 kg/hm2),150 kg/hm2 of phosphorus and 120 kg/hm2 of potassium.If nitrogen fertilizer added,the yield,brown rice rate,length/width,gel consistency and protein increased and the chalky grain and chalkiness decreased.If phosphorus fertilizer added,the chalky grain and chalkiness decreased obviously,but the head rice rate decreased also.Although the green rice rate decreased when the potassium fertilizer added,whereas it caused the amylose content to increase.There were advantages and disadvantages from the point of view of quality.Nitrogen fertilizer was the important element to increase yield and improve quality.Increasing yield and improving quality may be achieved at the same time.