Fate of Nitrogen Applied to Corn under the Rice-Corn System
Other Title
水稻 —玉米輪作田玉米作施用氮肥之蹤跡
Journal
中國農業化學會誌
Journal Volume
31
Journal Issue
2
Pages
200-212
Date Issued
1993-04
Author(s)
Shen Lian
連深
Abstract
The uptake of fertilizer N by corn as influenced by different tillages, timings and methods of application, as well as the fates of residual N in the subsequent rice cropping were studied under field conditions using 15N-tagged ammonium sulfate as a tracer.
1.The percentage uptake of fertilizer N by corn at harvest varied from 10 to 58, depending on timing and method of application. The uptake (10-28%) was lowest for the N banded basally at sowing. The uptake (44-58%) was highest for the N top-dressed at the knee-high stage: It was higher on soils with tillage than on those under no tillage, as the N top-dressed was covered by the up-hilled soil during mid-tilling with tillage, while it was not covered under no tillage.
以15N標識的硫酸銨追蹤秋作玉米各生育期(包括不同耕作及施肥方法)所施氮肥的吸收率及殘餘氮素在次作稻田之蹤跡，結果如下：
1.玉米在不同生育期及耕作方法下所施氮肥之吸收率差異很大：基肥之吸收率最低，僅10~28%。膝高期追肥的吸收率最高，達44~58%, 其中整地制度下之追肥因有培土，吸收率較高，而不整地制度下之追肥則因施肥後不培土，吸收率較低。
Subjects
15n
Timing of application
corn
n uptake
Rice-corn system
水稻
玉米
輪作
Publisher
中國農業化學會
Type
journal article