Effects of One-off Basal Application of Different Types of Nitrogen Fertilizer Varieties on Yield of Double-cropping Rice and Utilizing Rate of Nitrogen

Through field plot tests with CK( no fertilizer application),we studied the effects of one- off basal application of different types of nitrogen fertilizer varieties on the yield of double- cropping rice as well as the utilizing rate of nitrogen fertilizer.The results indicated that the one- off basal application of tested all nitrogen fertilizer varieties could increase the yield of double-cropping rice significantly. The treatment of applying SCU obtained the highest rice yield,the highest nitrogen- utilizing rate and the best economic benefit,followed by the treatments of applying Jinzhengda fertilizer and Yuan's fertilizer,and the application of common available chemical fertilizer got the worst results.