The Changes of Soil Physical Properties in Arctic-alpine Grassland Desertification Process in Northwest Sichuan -Taking Litang County for Example

LIU Shuo; CHEN Tian-wen; CAI Fan-long; YANG Jian-yong; ZOU Xia; ZHU Zi-zheng

doi:10.16779/j.cnki.1003-5508.2013.02.009

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Volume 34 Issue 2

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2013 > 34(2): 43-47

LIU Shuo, CHEN Tian-wen, CAI Fan-long, YANG Jian-yong, ZOU Xia, ZHU Zi-zheng. The Changes of Soil Physical Properties in Arctic-alpine Grassland Desertification Process in Northwest Sichuan -Taking Litang County for Example[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(2): 43-47. doi: 10.16779/j.cnki.1003-5508.2013.02.009

Citation:

LIU Shuo, CHEN Tian-wen, CAI Fan-long, YANG Jian-yong, ZOU Xia, ZHU Zi-zheng. The Changes of Soil Physical Properties in Arctic-alpine Grassland Desertification Process in Northwest Sichuan -Taking Litang County for Example[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(2): 43-47. doi: 10.16779/j.cnki.1003-5508.2013.02.009

The Changes of Soil Physical Properties in Arctic-alpine Grassland Desertification Process in Northwest Sichuan -Taking Litang County for Example

doi: 10.16779/j.cnki.1003-5508.2013.02.009

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Sichuan Forest Inventory and Plan Institute, Chengdu 610081, Sichuan, China;Liangshan Branch, the Yangtze River Forestation Bureau in Sichuan, Mianning 615608, China

Received Date: 2012-12-20

Abstract

In this paper, taking arctic-alpine grassland in Litang County as the research object, the method of the spatial sequence instead of the tempoal sequence was used to analyze the changes of different desertified grassland types in soil physical properties in the area. Analysis results showed the total porosity and capillary porosity of soil had a decreasing trend in the desertification process, and the soil sand content increased continuously and the soil bulk density increased to different degrees. The intial stage of the arcticalpine grassland desertification in the northwestern Sichuan was the critical stage of desertification prevention and control because the variations of soil bulk density and porosity in the early desertification stage were greater than those in the desertification progress stage. The soil bulk density of the upper layer of the soil (0~20 cm deep) was less than that of the lower layer (20 cm~40 cm deep), but the total and capillary porosities of the upper layer of the soil were greater than those of the lower layer; Besides, the average sand content in natural grassland was relatively high, which indicated that the arctic-alpine grassland in northwest Sichuan had potential desertification material conditions.
- Northwest Sichuan;
- Arctic-alpine grassland;
- Desertification;
- Soil physical properties
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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The Changes of Soil Physical Properties in Arctic-alpine Grassland Desertification Process in Northwest Sichuan -Taking Litang County for Example

doi: 10.16779/j.cnki.1003-5508.2013.02.009

Sichuan Forest Inventory and Plan Institute, Chengdu 610081, Sichuan, China;Liangshan Branch, the Yangtze River Forestation Bureau in Sichuan, Mianning 615608, China

Received Date: 2012-12-20

Key words:

Abstract: In this paper, taking arctic-alpine grassland in Litang County as the research object, the method of the spatial sequence instead of the tempoal sequence was used to analyze the changes of different desertified grassland types in soil physical properties in the area. Analysis results showed the total porosity and capillary porosity of soil had a decreasing trend in the desertification process, and the soil sand content increased continuously and the soil bulk density increased to different degrees. The intial stage of the arcticalpine grassland desertification in the northwestern Sichuan was the critical stage of desertification prevention and control because the variations of soil bulk density and porosity in the early desertification stage were greater than those in the desertification progress stage. The soil bulk density of the upper layer of the soil (0~20 cm deep) was less than that of the lower layer (20 cm~40 cm deep), but the total and capillary porosities of the upper layer of the soil were greater than those of the lower layer; Besides, the average sand content in natural grassland was relatively high, which indicated that the arctic-alpine grassland in northwest Sichuan had potential desertification material conditions.