Sustaining crop productivity while reducing environmental nitrogen losses in the subtropical wheat-maize cropping systems: A comprehensive case study of nitrogen cycling and balance
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- 作者：Minghua Zhoua ; c ; Bo Zhub ; bzhu@imde.ac.cn" class="auth_mail" title="E-mail the corresponding author ; Nicolas Brü ; ggemannc ; Michael Dannenmanna ; Yanqiang Wangb ; Klaus Butterbach-Bahla ; d ; klaus.butterbach-bahl@kit.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Nitrogen mass balance ; 15N ; Manure incorporation ; Coupling of C and N cycles ; Wheat ; Maize
- 刊名：Agriculture, Ecosystems & Environment
- 出版年：2016
- 出版时间：1 September 2016
- 年：2016
- 卷：231
- 期：Complete
- 页码：1-14
- 全文大小：3416 K
文摘
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N cycling, fluxes and total N budgets of the subtropical wheat-maize systems were investigated by using in situ monitoring and 15N tracer techniques.
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15N mass balance including hydrological and gaseous 15N fluxes was established.
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NO3− leaching and NH3 volatilization were main hydrological and gaseous N loss pathways, respectively.
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Incorporation of manure decreased total environmental N loss and enhanced soil microbial N retention.
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Manure incorporation fostered interaction of C and N cycles and N conservation.