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内蒙古农牧交错带土地利用变化对作物生长季N2O排放量的影响

焦 燕 侯建华 赵江红 杨文柱

焦 燕, 侯建华, 赵江红, 杨文柱. 内蒙古农牧交错带土地利用变化对作物生长季N2O排放量的影响[J]. 环境科学研究, 2015, 28(1): 16-22.
引用本文: 焦 燕, 侯建华, 赵江红, 杨文柱. 内蒙古农牧交错带土地利用变化对作物生长季N2O排放量的影响[J]. 环境科学研究, 2015, 28(1): 16-22.
JIAO Yan, HOU Jianhua, ZHAO Jianghong, YANG Wenzhu. Effects of Land-Use Change from Grassland to Cropland on Seasonal N2O Emissions in Farming-Pastoral Ecotone of Inner Mongolia[J]. Research of Environmental Sciences, 2015, 28(1): 16-22.
Citation: JIAO Yan, HOU Jianhua, ZHAO Jianghong, YANG Wenzhu. Effects of Land-Use Change from Grassland to Cropland on Seasonal N2O Emissions in Farming-Pastoral Ecotone of Inner Mongolia[J]. Research of Environmental Sciences, 2015, 28(1): 16-22.

内蒙古农牧交错带土地利用变化对作物生长季N2O排放量的影响

基金项目: 国家自然科学基金项目(41165010,4);2013内蒙古高等学校“青年科技英才”支持计划(NJYT-13-B06)

Effects of Land-Use Change from Grassland to Cropland on Seasonal N2O Emissions in Farming-Pastoral Ecotone of Inner Mongolia

  • 摘要: 在内蒙古农牧交错带,选择4个邻近、不同开垦年限(5、10和50 a)的农田,分别记为C5、C10和C50,以及天然草地作为研究样地;利用静态箱法,在2008—2010年作物生长季(4—10月)进行野外原位试验,研究了土地利用变化对N2O排放量的影响. 结果表明:草地与C5、C10、C50农田土壤的N2O排放量在2008—2010年作物生长季均存在显著差异,F分别为53.8、17.3和153.0(P均小于0.001),草地N2O排放量分别为87.6、91.8和211.0 mg/m2. 在2008—2010年作物生长季,C5和C10农田土壤N2O排放量比草地低10%~50%;随着开垦年限的增加,N2O累积排放量增加,C50在作物生长季的N2O排放量比草地高10%~30%. 草地和不同开垦年限的农田土壤在作物生长季内N2O排放量的58.1%受土壤w(NH4+-N)和含水量的综合影响(R2=0.58, P<0.01).

     

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出版历程
  • 收稿日期:  2014-03-06
  • 修回日期:  2014-09-20
  • 刊出日期:  2015-01-25

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