期刊
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
卷 144, 期 1, 页码 347-351出版社
ELSEVIER
DOI: 10.1016/j.agee.2011.10.001
关键词
Carbon fluxes; Grassland; Land use; Plowing; Tillage
资金
- Irish National Development Plan, through Research Stimulus Fund [RSF 07 506]
- European Community
Grassland re-seeding or land-use change requires ploughing, which may enhance carbon dioxide (CO2) emissions from soil. This study observed the short to intermediate-term (37 days) effects of ploughing on CO2 emissions from poorly drained grassland using automated soil respiration chambers. Immediately after ploughing, a brief peak in CO2 emissions from soil occurred with a maximum observed flux of 6.91 g CO2 m(-2) h(-1). Contradictory to other reported results, ecosystem respiration after ploughing was lower on the ploughed than on the grass site. After including estimates of photosynthesis in the analysis, ploughing led to significantly higher net CO2 emissions than from grassland. The main mechanism of C loss during ploughing was most likely due to a reduction in gross primary production rather than enhanced soil respiration. (C) 2011 Elsevier B.V. All rights reserved.
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