| 大气CO2浓度升高和氮肥水平对麦田土壤有机碳更新的影响 |
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| 引用本文： | 寇太记,朱建国,谢祖彬,刘钢,曾青.大气CO2浓度升高和氮肥水平对麦田土壤有机碳更新的影响[J].土壤学报,2009,46(3):459-465. |
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| 作者姓名： | 寇太记 朱建国 谢祖彬 刘钢 曾青 |
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| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京,210008;河南科技大学农学院,河南洛阳,471003
2. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，中国科学院知识创新工程重要方向性项目，国家自然科学基金重点项目 |
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| 摘 要： | 依托FACE（Free air carbon dioxide enrichment）技术平台,采用稳定13C同位索法,通过将C3作物小麦种植于长期单作玉米的C4土壤上,研究了大气CO2浓度升高和不同氮肥水平对水稻-小麦轮作制中冬小麦生长季土壤有机碳更新的影响。结果表明,种植一季小麦后土壤有机碳的δ13C值显著降低,小麦生长改变了土壤有机碳的组成,大气CO2浓度增加促进作物向土壤中输入更多的碳。大气CO2浓度升高增加了麦田土壤有机碳的更新率,使土壤有机碳的更新率由3.61%(施氮量为150 kg hm-2,LN)～4.59%(施氮量为250 kg hm-2,HN)提高至6.72%（LN）～8.55%（HN）,分别增加72.7%和86.1%。结果表明,大气CO2浓度升高和提高氮肥用量将加快农田土壤有机碳的更新。
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| 关 键 词： | CO2浓度升高 冬小麦 有机碳 土壤有机质 更新率 氮肥 |
Effect of elevated atmospheric pCO2 and nitrogen level on replacement rate of soil organic carbon in winter wheat field |
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| Kou Taiji,Zhu Jianguo,Xie Zubin,Liu Gang and Zeng Qing.Effect of elevated atmospheric pCO2 and nitrogen level on replacement rate of soil organic carbon in winter wheat field[J].Acta Pedologica Sinica,2009,46(3):459-465. |
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| Authors: | Kou Taiji Zhu Jianguo Xie Zubin Liu Gang and Zeng Qing |
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| Institution: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; College of Agriculture, Henan University of Science and Technology;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences |
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| Abstract: | |
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| Keywords: | Elevated atmospheric p CO2 Winter wheat Organic carbon Soil organic matter Replacement rate Nitrogen application rate |
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