| 陕北水蚀风蚀交错区不同植被下生物结皮的发育特征研究 |
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| 引用本文： | 孟杰,卜崇峰,张兴昌,孙占锋. 陕北水蚀风蚀交错区不同植被下生物结皮的发育特征研究[J]. 西北林学院学报, 2011, 26(4): 41-46 |
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| 作者姓名： | 孟杰 卜崇峰 张兴昌 孙占锋 |
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| 作者单位： | 西北农林科技大学资源与环境学院;中国科学院水利部水土保持研究所;《中国水土保持》杂志社; |
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| 基金项目： | 国家自然科学基金项目，中国科学院西部之光，陕西省自然科学基金项目 |
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| 摘 要： | 研究了黄土高原典型流域内不同植被下生物结皮的厚度、容重和抗剪强度等变化特征。结果表明:不同植被下黄土生物结皮的发育程度差异较大,表现在结皮的厚度、抗剪强度和容重几个指标上,总体发育程度顺序为:乔灌下结皮>多年生草本下结皮>一年生草本下结皮。随着生物结皮的发育和演替,结皮厚度增加,但增加幅度相对缓慢;结皮容重呈降低趋势,土壤孔隙结构得以改善;结皮抗剪强度不断增大,表明其控蚀效果相应增强。生物结皮的覆盖度和厚度均明显表现为:阴坡>阳坡,而容重变化则相反,即阴坡<阳坡;抗剪强度表现为阳坡略大于阴坡。说明坡向对生物结皮的发育具有显著影响。不同植被和坡向下生物结皮的发育特征出现差异,其水文生态功能理应有所不同,这在今后的研究中应予以重视。
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| 关 键 词： | 生物结皮 发育特征 植被类型 坡向 水蚀风蚀交错区 |
Developmental Characteristics of Biological Soil Crust under Different Vegetation Types in Wind-water Erosion Crisscross Region, Northern Shaanxi Province, China |
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| MENG Jie,BU Chong-feng,ZHANG Xing-chang,SUN Zhan-feng. Developmental Characteristics of Biological Soil Crust under Different Vegetation Types in Wind-water Erosion Crisscross Region, Northern Shaanxi Province, China[J]. Journal of Northwest Forestry University, 2011, 26(4): 41-46 |
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| Authors: | MENG Jie BU Chong-feng ZHANG Xing-chang SUN Zhan-feng |
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| Affiliation: | MENG Jie1,BU Chong-feng1,2,ZHANG Xing-chang1,SUN Zhan-feng3(1.College of Resources and Environment,Northwest A &F University,Yangling,Shaanxi 712100,China,2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,3.Soil and Water Conservation in China Press,Zhengzhou,Henan,450003) |
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| Abstract: | Biological soil crusts(BSC) are common features on soil surface in arid and semiarid regions,and play significant biological roles in these ecosystems.In order to determine the developmental characteristics of BSC in Liudaogou watershed in the wind-water erosion crisscross region on the Loess Plateau of China,the thickness,shear strength,and the bulk density of the BSC under different vegetation types and in different slope aspects were measured and taken as evaluation indices of crust's development.The res... |
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| Keywords: | biological soil crust development characteristic vegetation type slope aspect wind-water erosion crisscross region. |
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