| 不同沙漠化程度高寒草甸的土壤理化性质特征 |
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| 引用本文： | 张芳,王涛,薛娴,杨印海,张瑞君.不同沙漠化程度高寒草甸的土壤理化性质特征[J].干旱区资源与环境,2009(8). |
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| 作者姓名： | 张芳 王涛 薛娴 杨印海 张瑞君 |
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| 作者单位： | 中国科学院沙漠与沙漠化重点实验室;中铁西北科学研究院; |
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| 基金项目： | 国家973项目"干旱区绿洲化、荒漠化过程及其人类活动、气候变化的响应与调控(2009CB421300)"资助 |
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| 摘 要： | 黄河源区由于过度放牧,引起高寒草甸不同程度的沙漠化。随沙漠化程度的增加,容重和pH值逐渐升高,有机碳(SOC)和全氮(N)逐渐降低。在不同土壤层的分布中,容重和pH值的分布特征为:0-10 cm<10-20 cm<20-30 cm,SOC和全N的分布特征为:0-10 cm>10-20 cm>20-30 cm。适度放牧有利于SOC和全N的积累,过度放牧容易引起土壤沙漠化,阻碍畜牧业的可持续发展。
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| 关 键 词： | 高寒草甸 沙漠化 土壤理化性质 |
Soil physiochemical properties of different desertification lands in alpine region |
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| ZHANG Fang,WANG Tao,XUE Xian,YANG Yinhai,ZHANG Ruijun.Soil physiochemical properties of different desertification lands in alpine region[J].Journal of Arid Land Resources and Environment,2009(8). |
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| Authors: | ZHANG Fang WANG Tao XUE Xian YANG Yinhai ZHANG Ruijun |
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| Institution: | 1.Key Laboratory of Desert and Desertification;Chinese Academy of Sciences;Lanzhou 730000;P.R.China;2.The Northwest Branch of Science Research Academy of Railway Minsitry;P.R.China |
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| Abstract: | Desertification in study area is mainly resulted from overgrazing.With the development of desertification,bulk density and pH value increase,soil organic carbon(soc) and total N reduce.At different soil layers,bulk density and pH value decline with sequence of soil layers under 0-10cm,10-20cm and 20-30cm,while the content of SOC and total N accrete in the corresponding layers.Moderate grazing is conducive to accumulate SOC and total N.Overgrazing tends to deteriorate soil potential and hamper sustainable de... |
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| Keywords: | desertification soil physiochemical properties |
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