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《Arid Zone Research》 2004-04
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Study on the Water-conserving Capabilities of Soils under the Sloped Woodlands in the Loess Area in West Shanxi Province

SUN Zhong-feng, ZHANG Xue-pei, LIU Hui-fang, ZHANG Xiao-ming(College of Water and Soil Conservation , Beijing Forestry University; Key Laboratory of Water and Soil Conservation and Desertification Control, Ministry of Education ,Beijing 100083, China)  
The Loess Plateau is one of the regions with the most serious soil erosion and the most vulnerable e cological environment in the world. The multi-year practice has proved that the project of withdrawing from farming to afforesting and grass planting is an effective measure for regenerating vegetation and improving ecological environment. In this paper, the experimental field of Beijing Forestry University in Jixian County, west Shanxi Province, is taken as the study area to study the water-conserving capabilities of soils under the different standing forests in the loess area. In the study area it belongs to the warm-temperate climate, the annual temperature and precipitation are 10℃and 575. 9 mm respectively, and the frost-free period is about 170 days. The afforested forests are mainly composed of Robinia pseudoacacia and Pinus tabulaeformis, and most forests are pure or accompanied by Populus davidiana . The curves of soil moisture contents are regressed, the moisture contents in soils under the different standing forests are classified, and the critical effectivities of the moisture contents in soils under the different standing forests are calculated so as to derive the effective moisture contents in soils under the different forests. The comparison between the tree species reveals that the forests of Robinia pseudoacacia and its mixed forests have the highest range of soil moisture utilization and the strongest drought-resistant capability.
【Fund】: 国家"十五"重点科技攻关项目(2001BA5101301) 国家"973"项目(2002111503) 教育部霍英东青年教师基金(81026)资助
【CateGory Index】: S714.2
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