草地学报

›› 2006, Vol. 14 ›› Issue (4): 338-342.DOI: 10.11733/j.issn.1007-0435.2006.04.009

• 研究论文 • 上一篇    下一篇

云雾山封育草原对表土持水性的影响

刘娜娜1, 赵世伟1,2, 杨永辉2, 王恒俊2, 赵永刚2, 姬秀云3, 曹丽花1   

  1. 1. 西北农林科技大学资源环境学院, 陕西杨凌, 712100;
    2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌, 712100;
    3. 宁夏云雾山草原自然保护区管理处, 宁夏固原, 756500
  • 收稿日期:2006-03-13 出版日期:2006-11-15 发布日期:2006-11-15
  • 通讯作者: 赵世伟,E-mail:swzhao@ms.isw c.ac.cn
  • 作者简介:刘娜娜(1980- ),女,陕西韩城人,硕士研究生,主要从事土壤环境效应研究
  • 基金资助:
    “十一五”国家支撑计划重大项目(2006BCA01A07);黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-152);中国科学院水利部水土保持研究所知识创新领域前沿项目(SW04102)资助。

Study on Water-Holding Capacity of the Top Soil of a Steppe Reserve in the Yunwu Mountains, Guyuan, Ningxia Hui Autonomous Region

LIU Na-na1, ZHAO Shi-wei1,2, YANG Yong-hui2, WANG Heng-jun2, ZHAO Yong-gang2, JI Xiu-yun3, CHAO Li-hua1   

  1. 1. College of Resources and Environment, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi Province, 712100, China;
    2. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi Province, 712100, China;
    3. Department of Management of the Yunwu Mountains Reservation, Guyuan, Ningxia Hui Autonomous Region, 756500, China
  • Received:2006-03-13 Online:2006-11-15 Published:2006-11-15

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摘要： 应用离心机法测定土壤水分特征,研究黄土高原典型草原带退耕地植被恢复演替过程中土壤持水性能的变化特点及趋势。结果表明:土壤含水量与土壤水吸力之间符合幂函数θ=aSb,参数a的变化随着植被的演替呈增加趋势;由于植被的影响,在同一吸力范围内的土壤含水量不同,植被为顶级长芒草(Stipabungeana)群落时,土壤在各吸力段的含水量最高,坡耕地最低;其它群落土壤含水量随着水吸力的增加变化趋于一致;退耕地植被在演替过程中通过提高土壤有机质含量改善结构,降低容重并增加毛管孔隙度,对土壤的储水和持水性能产生作用。

关键词: 云雾山, 植被恢复演替, 土壤水分特征曲线, 土壤持水性

Abstract: The study was undertaken to determine the tendency and variation of the soil-water holding capacity during the restored vegetation community succession in a plot of former cropland bordering a typical steppe zone on the Loess Plateau. The curves of soil water characteristics measured by centrifugation showed: there was a high power function correlation between the soil moisture and the potential of soil water, which could be represented by θ=aSb. Following the succession of the vegetations, the value a increased gradually. Soil water contents of various vegetations are different at the same range of soil water potential. The data indicated that the water content of soil covered with Stipa bungeana was the highest, while the land was the lowest in the slope, though at the same range of soil water potential. The soil water contents of other plant community successions reached the same level with the increase of soil water potentials. The vegetation succession lessened the soil bulk density and enhanced the soil porosity by increasing the soil organic matter and improving the soil construction; thus, affecting the soil-water holding capacity.

Key words: Yunwu mountains, Vegetations restoration and succession, Curve of soil water characteristic, Soil water holding capacity

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