| 利用方式对干旱草原土壤碳水化合物含量及团聚体稳定性的影响 |
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| 引用本文： | 王哲锋,高波,李小刚.利用方式对干旱草原土壤碳水化合物含量及团聚体稳定性的影响[J].甘肃农业大学学报,2006,41(3):91-95. |
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| 作者姓名： | 王哲锋 高波 李小刚 |
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| 作者单位： | 甘肃农业大学资源与环境学院,甘肃,兰州,730070 |
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| 基金项目： | 教育部重点技术研究项目(204140)资助． |
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| 摘 要： | 以自然放牧草地为对照,对围栏草地和耕地2种利用方式下干旱草原土壤总有机碳、碳水化合物碳含量和土壤团聚体稳定性进行了测定．与自然放牧地相比较,围栏草地土壤总有机碳和碳水化合物碳含量显著增加;耕种土壤总有机碳含量变化不明显,但碳水化合物碳含量显著降低．与自然放牧地相比较,围栏放牧草地土壤团聚体稳定性变化不明显,而耕种土壤团聚体稳定性显著降低．据此认为,在耕地利用方式下土壤团聚体稳定性的显著降低,与土壤碳水化合物碳含量的显著降低密切相关．
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| 关 键 词： | 草原土壤 有机碳 团聚体稳定性 耕种 放牧 |
| 文章编号： | 1003-4315（2006）03-0091-05 |
| 收稿时间： | 2005-12-15 |
| 修稿时间： | 2005-12-15 |
Effects of different land use types on carbohydrate content and aggregate stability in arid grassland soil |
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| WANG Zhe-feng,GAO Bo,LI Xiao-gang.Effects of different land use types on carbohydrate content and aggregate stability in arid grassland soil[J].Journal of Gansu Agricultural University,2006,41(3):91-95. |
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| Authors: | WANG Zhe-feng GAO Bo LI Xiao-gang |
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| Institution: | College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China |
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| Abstract: | This work was designed to investigate the changes in total soil organic carbon and carbohydrate content and their relations to soil aggregate stability under different land use types in dry grassland induced by cultivation and intensive-grazing, compared with extensive-grazing. Intensive-grazing significantly increased soil organic C and carbohydrate content;cultivation did not influence total organic C,but significantly decreased carbohydrate content in soil compared with extensive-grazing,cultivation significantly reduced soil aggregate stability but intensive-grazing did not in this study. We concluded the substantial reduction in aggregate stability under cultivation land use was closely related to the decrease in carbohydrate content in soils. |
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| Keywords: | grassland soil organic C aggregate stability cultivation grazing |
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