Effect of application rate of nitrogen on its utilization in wheat by using ~(15)N tracer technique
Effect of application rate of nitrogen on its utilization in wheat by using ~(15)N tracer technique
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发表时间：
2004
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通讯作者：
Guang-cai Zhao;Zhonghu He;Qizhuo Tian;Ke-lin Li;Lihua Liu;Zhen-huai Li;Wenbiao Zhang
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作者：
Guang-cai Zhao;Zhonghu He;Qizhuo Tian;Ke-lin Li;Lihua Liu;Zhen-huai Li;Wenbiao Zhang
采用15N示踪技术研究了氮素基追与追肥不同配比对面包小麦氮素利用的影响。结果表明，随着追氮比例的增加，籽粒蛋白质含量增加，外颖、根、秆的含氮量增加。在油菜各器官中，籽粒含氮量最高，外颖、叶片、秆、根依次整齐排列。施用尿素的氮素残留量低于施用硫铵的氮素残留量，而氮素在籽粒中的吸附量高于施用硫铵的氮素吸附量。小麦植株各器官的NDFF（含氮量占肥料氮的百分比）呈抛物线变化，可用Y=a+bx+ cx2（Y =NDFF，x =处理代号）表示。
By using 15 N tracer technique the effects of different application proportion of basic dressing and top dressing of nitrogen on its utilization in bread wheat were studied. The result indicated that the grain protein content raised with the proportion increasing of top dressing of nitrogen, so did the nitrogen content in outer glume, roots and culm. Among all the organs of the plants at raping time, the grain contained the highest nitrogen, the outer glume, leaf, culm and roots neat in order. The residual quantity of nitrogen was fewer in moratorium and the sorption quantity of nitrogen was more in grain with urea application than ammonium sulphate application. The change of NDFF(percentage of nitrogen content from nitrogen in fertilizer ) in every organ of wheat plants showed like a parabola which can be expressed in the equation Y=a+bx+cx 2 (Y =NDFF , x = code of treatment).