Uptake of Weed-Borne15N by Maize in Field Experiments
作者:
I. Merbach,
期刊:
Isotopes in Environmental and Health Studies
(Taylor Available online 1997)
卷期:
Volume 33,
issue 1-2
页码: 45-52
ISSN:1025-6016
年代: 1997
DOI:10.1080/10256019808036358
出版商: Taylor & Francis Group
关键词: Field experiment;maize;nitrogen conservation;nitrogen uptake;weed-borne nitrogen;weeds
数据来源: Taylor
摘要:
Uptake of weed-borne nitrogen by maize was tested with15N in field experiments on silty loam (haplic phaeozem) after common growth of maize andChenopodium albumL. and incorporating the weeds at the 4- to 6-leaf stage of maize. Maize took up 22–23% of the weed-borne N in the year of incorporating and residual 7–32% in the following year. Uptake of weed-borne N was higher in comparable pot experiments. Different soil humidity after different water supply was mainly reasonable for these differences. Weed-borne nitrogen contributed 7–16% to total N of maize in the year of incorporating and 4–11% in the following year. Yield and N uptake between weeded and unweeded maize differed partly significant.
点击下载:
PDF (368KB)
返 回