[Nitrogen uptake and its utilization by rice in paddy field of Taihu area].
The effects of different amounts and kinds of nitrogen fertilizer on rice yield and its nitrogen uptake and utilization were studied on a main paddy soil (Wushan soil) of Taihu area. The results indicated that the optimal amount of nitrogen fertilizer was about 180 kg N.hm-2 for rice production. Applying ammonium sulfate was better than applying urea for increasing rice yield. The efficiency of nitrogen fertilizer in this experiment was about 41.8-48.5%, and its loss was 22.8-38.1%.
Song
Yongsheng
Y
Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Fan
Xiaohui
X
D018556:Crops, Agricultural / Q000254:growth & development; D005308:Fertilizers; D009584:Nitrogen / Q000378:metabolism*; D012275:Oryza / Q000254:growth & development* / Q000378:metabolism*
D005308:Fertilizers; D009584:Nitrogen