摘要
研究了限水灌溉下不同氮肥用量对冬小麦产量和氮素分配利用的影响。结果表明 :氮肥利用率随氮肥量的递增而降低 ,施 2 2 5kg/hm2 纯氮处理达到最高产量 ,在此基础上增施氮肥产量下降 ;随着施氮量的增加 ,植株体内的氮素较多地分配于营养器官 ,地上部器官叶片占的比例最大 。
The field experiment on effect of different nitrogen application on yield,nitrogen distribution and utilization in water wheat under water stress has been processed in Hebei province where is serious dry area from 1997 to 1998.The results show that with the increase of N application,nitrogen utilization efficiency decreased,the treatment (225 kg/ha)arrived the highest yield,and the yield of other treatments applied over the rate decreased.With the increase of N application,N absorbed was mainly distributed in nutrition orgens of plants in which leaf had the biggest ratio.At the same time the harvest index declined in turn.
出处
《华北农学报》
CSCD
北大核心
2001年第3期86-91,共6页
Acta Agriculturae Boreali-Sinica
基金
国家自然科学基金项目 ( 3 95 70 4 3 7)
