RICE SCIENCE ›› 2005, Vol. 12 ›› Issue (4): 267-274 .

• 研究报告 • 上一篇    下一篇

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   

  1. Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China
  • 收稿日期:2005-08-05 出版日期:2005-12-28 发布日期:2005-12-28
  • 通讯作者: YANG Jian-chang
  • 基金资助:
    National Natural Science Foundation of China(30390080), 948 Project of Ministry of Agriculture of China (2003-Z53) and the International Rice Research Institute.

摘要: The effects of application of N fertilizer on wheat on the grain yield and N use efficiency (FNUE) of rice in the wheat-rice rotation system, as well as on the soil fertility were studies. N-fertilizer application on 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 decreased under high INS. These results indicated that high INS was one of the main reasons for the low FNUE in rice.

关键词: soil indigenous nitrogen supply, soil fertility, rice, yield, fertilizer use efficiency, nitrogen