| 田洪艳,李质馨,周道玮,窦肇华,鲁质博,侯瑜,徐冶,刘晓冬.草原土壤胀缩运动的发生机制研究[J].干旱地区农业研究,2003,(1):86~90 |
| 草原土壤胀缩运动的发生机制研究 |
| Study on mechanism of expansion and contraction of soil in grassland |
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| DOI：10.7606/j.issn.1000-7601.2003.01.20 |
| 中文关键词: 土壤胀缩运动 粘粒含量 草原地裂缝 |
| 英文关键词:expansion and contraction of soil content of clay crevic e of grassland |
| 基金项目:国家重点基础规划项目(G2000018606) |
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| 中文摘要: |
| 着重调查草原地裂缝的空间静态分布及时间动态分布,并调查土壤及植被状况,研究草原土壤胀缩运动的发生机制,结果表明:土壤的开裂主要与土壤粘粒(<0.001mm)含量有关,土壤粘粒含量越高,土壤胀缩程度越大。认为土壤胀缩运动主要决定于土壤粘粒的含量,同时季节性冻融作用与干湿交替作用是导致土壤胀缩运动的直接因素。 |
| 英文摘要: |
| The research on the mechanism of expansion and contraction of soil in grassland was conducted by counting different types of cr evices, investigating the space and time distribution of the crevics, and look ing into the state of soil and vegetation. The results shows that the expansion and contraction of soil is mainly related to the content of clay (<0.001mm), th e higher the content of clay, the greater the degree of expansion and contractio n. Moreover, seasonal freezing and melting and seasonal drying and wett ing are the direct factors causing soil to expand and contract. |
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