KUANG Gao-ming,ZHU Qing-ke,LIU Zhong-qi,et al.Effect of Microrelief on the Soil Water and Vegetation Arrangement in Loess Hilly and Gully Region[J].Research of Soil and Water Conservation,2012,19(03):74-77.
黄土丘陵沟壑区微地形对土壤水分及生物量的影响
- Title:
- Effect of Microrelief on the Soil Water and Vegetation Arrangement in Loess Hilly and Gully Region
- 分类号:
- S152.7
- 摘要:
- 黄土丘陵沟壑区坡面内地表的起伏形成微地形，而按照微地形进行植被配置已经成为黄土丘陵沟壑区生态恢复建设的重要方向。采用样方调查与随机采样的方法，调查陕西省吴起县合家沟流域微地形及坡面生物量，并用探针式TDR测定土壤含水量。结果表明，随着土层深度的增加，各类微地形土壤水分的变异系数有减小的趋势，而0-60 cm土层，陡坎的土壤水分变异系数最大，塌陷的最小；各微地形土壤水分顺序为：塌陷>缓台>切沟底>浅沟底>原状坡>陡坎；各类微地形及原状坡内生物量从大到小的排序为塌陷>切沟>浅沟>原状坡>缓台>陡坎，且微地形生物量与0-60 cm土层土壤水分变异系数呈负相关性。
- Abstract:
- In loess hilly and gully region, fluctuating land surface forms microrelief. Microrelief-based vegetation arrangement has become an important method in ecological restoration and construction. By using sampling surveys and random sampling, the biomass and the soil water content were surveyed by TDR on microrelief and the corresponding original slope in Hejia valley, Wuqi County, Shaanxi Province. Results showed that the coefficient of variation of microrelief soil water decreased with the increase of soil depth. The variation coefficient of soil water (0-60 cm soil) at scarp was the biggest (0.259) while at shallow gully was the smallest (0.226). In terms of soil water on sunny slope and soil water, landform units might be ranked in the descendant order of collapse, gully>platform>collapse>shallow gully>original slope>scarp, in addition, the sequence of vegetation arrangement was collapse>gully>shallow gully>original slope>platform>scarp, and the vegetation arrangement of microrelief was correlated negatively the variation coefficient of soil water (0-60 cm depth of soil).
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备注/Memo
收稿日期:2011-10-26;改回日期:2011-12-1。
基金项目:林业公益性行业科研专项（201104002-2）
作者简介:邝高明（1987- ），男，河南驻马店人，硕士研究生，主要研究方向：水土保持和生态环境地理学。E-mail：kuanggaoming@126.com
通讯作者:朱清科（1956- ），男，宁夏固原人，教授，博士生导师，主要研究方向：水土保持和林业生态工程。E-mail：zhuqingke@sohu.com