| 喀斯特地区不同土地利用方式对土壤有机碳、全氮以及微生物生物量碳和氮的影响 |
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| 引用本文： | 李新爱,肖和艾,吴金水,苏以荣,黄道友,黄敏,刘守龙,彭洪翠.喀斯特地区不同土地利用方式对土壤有机碳、全氮以及微生物生物量碳和氮的影响[J].应用生态学报,2006,17(10):1827-1831. |
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| 作者姓名： | 李新爱 肖和艾 吴金水 苏以荣 黄道友 黄敏 刘守龙 彭洪翠 |
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| 作者单位： | 1.中国科学院亚热带农业生态研究所亚热带农业生态重点实验室， 长沙 410125；;2.中国科学院研究生院， 北京 100039；;3.中国科学院环江喀斯特农业生态实验站，环江 547100 |
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| 基金项目： | 中国科学院知识创新工程项目;国家重点基础研究发展计划(973计划);国家自然科学基金;国家自然科学基金;国家科技攻关项目 |
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| 摘 要： | 以广西环江大才为代表，选择亚热带典型喀斯特峰林谷地样区，通过对样区土壤进行密集采样和测定分析，研究了土地利用方式对土壤有机碳（OC）和全氮（TN）含量及土壤微生物生物量碳（BC）和氮（BN）含量的影响.结果表明，3种土地利用方式下，土壤有机碳含量在稻田和林地中基本相同，而旱地显著低于稻田和林地.土壤全氮含量为稻田显著高于林地，而林地显著高于旱地.土壤微生物生物量碳含量为稻田显著高于林地，林地显著高于旱地.土壤微生物生物量氮含量在稻田和林地中基本相同，而旱地显著低于稻田和林地.旱地土壤pH值显著低于稻田和林地土壤.3种土地利用方式下，土壤微生物生物量碳与土壤有机碳、土壤微生物生物量氮与全氮含量之间均呈显著的正相关关系.土壤微生物生物量碳和氮含量可以作为评价喀斯特地区土壤质量和肥力的指标之一，对土地利用方式响应较为敏感.
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| 关 键 词： | 区域农业生态系统 环境质量 评价 |
| 文章编号： | 1001-9332(2006)10-1827-05 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2006-07-24 |
Effects of land use type on soil organic carbon, total nitrogen, and microbial biomass carbon and nitrogen contents in Karst region of South China |
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| LI Xinai,XIAO Heai,WU Jinshui,SU Yirong,HUANG Daoyou,HUANG Min,LIU Shoulong,PENG Hongcui.Effects of land use type on soil organic carbon, total nitrogen, and microbial biomass carbon and nitrogen contents in Karst region of South China[J].Chinese Journal of Applied Ecology,2006,17(10):1827-1831. |
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| Authors: | LI Xinai XIAO Heai WU Jinshui SU Yirong HUANG Daoyou HUANG Min LIU Shoulong PENG Hongcui |
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| Affiliation: | 1.Key Laboratory of Subtropical Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039, China;3.Huanjiang Experiment Station of Karst Agricultural Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, China |
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| Abstract: | A total of 721 surface (0-20 cm) soil samples were collected from the paddy field, upland, and woodland in the Karst region of Dacai, Huanjiang County, Guangxi Province, and the contents of their organic carbon (Oc ), total nitrogen (TN), microbial biomass carbon (Bc) , and microbial biomass nitrogen (BN) were determined. The results showed that the Oc and BN contents and soil pH value showed the trend of paddy field = woodland > upland, while TN and Bc contents had the trend of woodland > paddy field > upland. There was a significant positive correlation between Bc and Oc, and between B5 and TN. Soil microbial biomass C and N had rapid responses to the changes of land use type, which could be used as the sensitive biological indicators in evaluating soil quality and fertility in Karst region. |
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| Keywords: | Karst region Land use type Woodland Upland Paddy field Soil organic C Total N Microbial biomass C Microbial biomass N |
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