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|Table of Contents|

Influences of grassland degradation on soil saturated moisture content in the Three-River Headwaters Region(PDF)

Journal of Nanjing Forestry University(Natural Science Edition)[ISSN:1000-2006/CN:32-1161/S]

Issue:
2018 03
Page:
182-186
Column:
publishdate:
2018-05-15

Article Info:/Info

Title:
Influences of grassland degradation on soil saturated moisture content in the Three-River Headwaters Region
Article ID:
1000-2006(2018)03-0182-05
Author(s):
WU Dan1 CAO Wei2 SHAO Quanqin2* ZHAO Zhiping3
1. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China; 2. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Keywords:
Keywords:grassland degradation saturated moisture content of grassland soil soil porosity the Three-River Headwater Region
Classification number :
S812.2; S715
DOI:
10.3969/j.issn.1000-2006.201708008
Document Code:
A
Abstract:
Abstract: 【Objective】Influences of grassland degradation on soil saturated moisture content in the Three-River Headwaters Region, Qinghai Province, could provide certain scientific reference for comprehensive monitoring and assessment of grassland ecosystem.【Method】Based on remote sensing data, we analyzed the temporal and spatial characteristics of grassland degradation since the middle and late 1970s. According to the measured porosity data for different soil types and different degradation grades, we analyzed the temporal and spatial variation of saturated moisture content of grassland soil in order to analyze their relational degree.【Result】Grassland degradation occurred continually from the middle and late 1970s to 2004. In contrast, the degraded grasslands exhibited a degree of recovery from 2004 to 2012. The saturated moisture content of grassland soil decreased by 4.558 billion m3 and 0.150 billion m3 in these two periods, respectively.【Conclusion】Although the degraded grassland had shown a slight recovery since 2004, the saturated moisture content of grassland soil showed a declining phenomenon. Vegetation degeneration was the direct cause of soil degradation in the study area. Such degeneration could change the soil physical and chemical properties, further affecting soil water retention in grassland ecosystem.

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Last Update: 2018-06-06