Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Rice Science》 2005-04
Add to Favorite Get Latest Update

Effect of Indigenous Nitrogen Supply of Soil on the Grain Yield and Fertilizer-N Use Efficiency in Rice

LIU Li-jun, XU Wei, TANG Cheng, WANG Zhi-qin, YANG Jian-chang (Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China)  
The effect of applying N-fertilizer or not in wheat on soil fertility and grain yield and fertilizer-N use efficiency (FNUE) of rice in the wheat-rice cropping system were studied. N-fertilizer application in wheat significantly increased total N, ammonium-N and nitrate-N contents in paddy field, resulting in high indigenous N supply of soil (INS). Compared with low INS, the effect of N rate on the grain yield of rice was reduced significantly, and FNUE was also decreased to different extent under high INS. These results indicated that high INS was one of the main reasons for low FNUE in rice. Under high INS, rice grain quality tended to be worse.
【Fund】: 国家自然科学基金资助项目(30390080);; 农业部“948”资助项目(2003-Z53);; 国际水稻研究所合作项目。
【CateGory Index】: S511
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved