| 黄土高原半干旱草地封育后土壤碳氮矿化特征 |
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| 引用本文： | 王玉红,马天娥,魏艳春,魏孝荣,邵明安,程积民,张兴昌.黄土高原半干旱草地封育后土壤碳氮矿化特征[J].生态学报,2017,37(2):378-386. |
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| 作者姓名： | 王玉红 马天娥 魏艳春 魏孝荣 邵明安 程积民 张兴昌 |
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| 作者单位： | 中国科学院教育部水土保持与生态环境研究中心, 杨凌 712100;中国科学院大学, 北京 100049,西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100;西北农林科技大学资源环境学院, 杨凌 712100,西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100;西北农林科技大学资源环境学院, 杨凌 712100,中国科学院教育部水土保持与生态环境研究中心, 杨凌 712100;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100,中国科学院教育部水土保持与生态环境研究中心, 杨凌 712100;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100,中国科学院教育部水土保持与生态环境研究中心, 杨凌 712100;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100,中国科学院教育部水土保持与生态环境研究中心, 杨凌 712100;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100 |
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| 基金项目： | 国家自然科学基金资助项目（41271315，41571296）；教育部新世纪优秀人才支持计划资助项目（NCET-13-0487）；中国科学院青年创新促进会科研专项资助项目（2014371） |
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| 摘 要： | 土壤有机碳和全氮的分布与矿化是退化草地封育后土壤生态效应研究的重要内容和指标。结合野外调查和室内培养实验,研究了半干旱黄土区不同封育年限草地土壤有机碳和全氮的含量变化及其矿化特征。结果表明,封育对半干旱黄土区退化草地土壤有机碳和全氮的影响主要体现在0-40 cm土层封育超过17a后,封育年限的影响逐渐减弱。封育显著增加了土壤有机碳矿化速率和C_(min)/C_0封育对有机碳矿化速率的影响与封育年限和土层深度无关,而对C_(min)/C_0的影响则与封育年限和土层深度有关。封育显著提高了0-40 cm土层土壤氮素矿化速率,但是降低了40-80 cm土层土壤氮矿化速率,并且降低了080 cm土层N_(min)/N_0。碳氮矿化速率与有机碳和全氮之间显著相关,而与碳氮比之间的相关性较小。这些结果表明,退化草地封育后土壤碳氮元素的转化主要受土层深度、封育年限以及土壤碳氮含量的影响。
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| 关 键 词： | 退化草地封育 土壤有机碳 土壤全氮 剖面分布 矿化 土壤特性 |
| 收稿时间： | 2015/8/10 0:00:00 |
| 修稿时间： | 2016/5/16 0:00:00 |
Influence of grazing exclusion on soil organic carbon and nitrogen mineralization in semiarid grasslands of the Loess Plateau |
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| WANG Yuhong,MA Tian''e,WEI Yanchun,WEI Xiaorong,SHAO Ming''an,CHENG Jimin and ZHANG Xingchang.Influence of grazing exclusion on soil organic carbon and nitrogen mineralization in semiarid grasslands of the Loess Plateau[J].Acta Ecologica Sinica,2017,37(2):378-386. |
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| Authors: | WANG Yuhong MA Tian'e WEI Yanchun WEI Xiaorong SHAO Ming'an CHENG Jimin and ZHANG Xingchang |
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| Institution: | Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;University of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China;College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China;College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China,Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China,Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China,Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China and Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Agriculture and Forestry University, Yangling 712100, China |
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| Abstract: | |
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| Keywords: | grazing management soil organic carbon nitrogen soil profiles carbon mineralization soil properties |
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