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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.

 

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