| 等高绿篱-坡地农业复合系统土壤CO_2排放特征 |
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| 引用本文： | 莫琼,郭忠录,蔡崇法,程艳辉,张国彪.等高绿篱-坡地农业复合系统土壤CO_2排放特征[J].土壤通报,2011(4). |
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| 作者姓名： | 莫琼 郭忠录 蔡崇法 程艳辉 张国彪 |
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| 作者单位： | 华中农业大学农业部亚热带农业资源与环境重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(40901132); 中央高校基本科研业务费专项资金资助(52204-08076) |
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| 摘 要： | 基于2008年12月初至翌年6月初绿篱-冬小麦复合系统土壤CO2全生长季的观测,研究了绿篱复合种植及其枝叶不同还田(移出/AR、翻施/AI和表施/AC)方式下土壤CO2的排放特征。结果表明,整个冬小麦生长期间,各处理土壤CO2排放具有相似的季节变化趋势,小麦生长旺盛期明显高于越冬期和成熟期。绿篱复合种植及其枝叶还田显著影响土壤CO2排放,与作物单作(CK)处理相比,AR处理土壤CO2平均排放通量降低了9.07%,而AI和AC处理分别增加了35.70%和8.42%。土壤温度、作物生长及土壤微生物生物量碳是影响土壤CO2排放的主要因素。土壤CO2排放通量与土壤温度呈显著或极显著指数正相关,其中与10 cm处土壤温度的相关性最高;同时,土壤CO2排放与0~5 cm土层微生物生物量碳含量及小麦地下生物量均呈显著线性相关;土壤水分对土壤CO2排放的影响居于次要地位。
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| 关 键 词： | 等高绿篱复合系统 枝叶还田 CO2排放 影响因子 |
Soil CO_2 Emission and Its Factors in Contour Hedgerow Intercropping System in Subtropical China |
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| MO Qiong,GUO Zhong-lu,CAI Chong-fa,CHENG Yan-hui,ZHANG Guo-biao.Soil CO_2 Emission and Its Factors in Contour Hedgerow Intercropping System in Subtropical China[J].Chinese Journal of Soil Science,2011(4). |
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| Authors: | MO Qiong GUO Zhong-lu CAI Chong-fa CHENG Yan-hui ZHANG Guo-biao |
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| Institution: | MO Qiong,GUO Zhong-lu,CAI Chong-fa,CHENG Yan-hui,ZHANG Guo-biao(Key Laboratory of Subtropical Agriculture and Environment,Ministry of Agriculture,Huazhong Agricultural University,Wuhan,430070 China.) |
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| Abstract: | A field experiment was conducted in Amorpha fruticosa-wheat intercropping system to understand the effect of different hedge pruning management practices(e.g.,prunings were removed from plots(AR),incorporated into soil(AI) and applied as mulch(AC)) on soil CO2 emission during the growth of winter wheat in 2008-2009.The results showed that soil CO2 fluxes revealed distinct seasonal dynamics for all treatments,with the highest values being observed during the heading stage of crop growth,while the lowest flux... |
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| Keywords: | Contour hedgerow Intercropping system Hedge pruning returning Soil CO2 flux Impact factors |
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