| 不同放牧梯度下草甸草原土壤微生物和酶活性研究 |
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| 引用本文： | 闫瑞瑞,闫玉春,辛晓平,杨桂霞,王旭,张保辉.不同放牧梯度下草甸草原土壤微生物和酶活性研究[J].生态环境,2011,20(2):259-265. |
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| 作者姓名： | 闫瑞瑞 闫玉春 辛晓平 杨桂霞 王旭 张保辉 |
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| 作者单位： | 呼伦贝尔草原生态系统国家野外科学观测研究站∥草地科学研究室∥中国农业科学院农业资源与农业区划研究所,北京,100081 |
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| 基金项目： | 公益性行业(农业)科研专项，现代农业产业技术体系建设专项资金资助 |
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| 摘 要： | 通过小区控制放牧实验,研究呼伦贝尔草甸草原不同放牧强度下草地土壤微生物和酶活性的变化。结果表明：不同处理土壤微生物数量表现为细菌〉放线菌〉真菌。不同土层土壤微生物总数不放牧处理大于放牧处理,0～30 cm土层土壤微生物生物量碳、氮含量在轻牧区较高,在中牧区较低。土壤脲酶和过氧化氢酶活性轻度放牧和中度放牧高于不放牧和重度放牧。土壤微生物数量、生物量、土壤蛋白酶和过氧化氢酶活性均随土壤深度的增加呈递减趋势。相关分析表明,土壤微生物数量、微生物生物量以及土壤酶活性相互之间密切相关,土壤微生物量N与细菌达到极显著正相关（P〈0.01）,与真菌和放线菌呈显著相关（P〈0.05）。土壤微生物量C与真菌达到极显著负相关（P〈0.01）,与放线菌呈显著负相关（P〈0.05）。土壤微生物数量、土壤微生物量N与转化酶、蛋白酶、过氧化氢酶活性呈显著或极显著正相关。土壤微生物量C与转化酶、蛋白酶、过氧化氢酶呈显著负相关（P〈0.05）。
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| 关 键 词： | 草甸草原 放牧梯度 微生物数量 微生物生物量 酶活性 土壤 |
Changes in microorganisms and enzyme activities in soil under different grazing intensities in meadow steppe, Inner Mongolia |
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| YAN Ruirui,YAN Yuchun,XIN Xiaoping,YANG Guixia,WANG Xu,ZHANG Baohui.Changes in microorganisms and enzyme activities in soil under different grazing intensities in meadow steppe, Inner Mongolia[J].Ecology and Environmnet,2011,20(2):259-265. |
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| Authors: | YAN Ruirui YAN Yuchun XIN Xiaoping YANG Guixia WANG Xu ZHANG Baohui |
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| Affiliation: | YAN Ruirui,YAN Yuchun,XIN Xiaoping,YANG Guixia,WANG Xu,ZHANG Baohui Hulunbeir Grassland Ecosystem Research Station//Laboratory of Grassland Science//Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,China,Beijing 100081 |
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| Abstract: | The accounts and biomasses(carbon and nitrogen) of the microorganisms and enzyme activities in soil under different grazing intensities in meadow steppe in Inner Mongolian Region were studied.The accounts showed in an order of bacteria > actinomycetes > fungi.The total account of the microorganisms in soil was greater for no-grazing treatment than for grazing treatments.The biomasses of the microorganisms in top 0-30 cm soil layer reached the highest value for the lightly grazing treatment,and was the lowes... |
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| Keywords: | meadow steppe grazing intensity microorganism biomass enzyme activity soil |
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