摘要
用含^(15)N 有机物料,研究了冬小麦对当季施用和前茬花生施用有机物料中氮素的吸收利用。亩施不同量的有机物料(折纯氮2.5～15kg),当季施用,小麦对有机物料中氮素的吸收利用率为10.92%,氮素在土壤中残留率为61.39%,损失率为27.67%;前茬花生施用表现了同样趋势。小麦植株体总氮中,当季施用和前茬花生施用有机物料供氮率分别为5.37%和3.39%,土壤供氮率分别为94.63%和96.61%。当季或前茬花生施用含氮有机物料,对冬小麦均有增产效果,分别增产8.8%和9.5%。
The study on the absorption and utilization of winter wheat to nitrogen (N^(15)labelled) in organic materials applied in the season and to the preceding crop of groundnut showed that the absorption and utilization efficiency of winter wheat to nitrogen in organic mate- rials(the amount of pure nitrogen from 2.5kg to 15 kg per mu) applied in the season was 10.92%,the remains of nitrogen in soil accounted for about 61.39% of the total applied ni- trogen,and the percentage of nitrogen lost was 27.67%.The trend of absorption and utili- zation of winter wheat to nitrogen applied to the preceding crop of groundnut was nearly the same as that of nitrogen applied in the season.The proportion of nitrogen on wheat plant from the organic materials applied in the season and to the preceding crop of groundnut were 5.37% and 3.39% respectively,and from soil nitrogen applied in the sea- son and to the preceding crop of groundnut 94.36% and 96.61% respectively.The nitrogen containing organic materials applied in the season and to the preceding crop of groundnut could increase the output of winter wheat about 8.8% and 9.5% respectively.
出处
《莱阳农学院学报》
1991年第2期102-107,共6页
Journal of Laiyang Agricultural College
关键词
冬小麦
有机物料
氮素
吸收
winter wheat
tracer N^(15)organic material
utilization efficiency of nitrogen
nitrogen supply by soil
