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晋西黄土高原水资源植被承载力分析及对策建议

茹 豪 张建军 李玉婷 田宁宁 张艳婷

茹 豪, 张建军, 李玉婷, 田宁宁, 张艳婷. 晋西黄土高原水资源植被承载力分析及对策建议[J]. 环境科学研究, 2015, 28(6): 923-929.
引用本文: 茹 豪, 张建军, 李玉婷, 田宁宁, 张艳婷. 晋西黄土高原水资源植被承载力分析及对策建议[J]. 环境科学研究, 2015, 28(6): 923-929.
RU Hao, ZHANG Jianjun, LI Yuting, TIAN Ningning, ZHANG Yanting. Analysis and Countermeasures of the Carrying Capacity of Water Resources for Vegetation on the Loess Plateau, Western Shanxi Province, China[J]. Research of Environmental Sciences, 2015, 28(6): 923-929.
Citation: RU Hao, ZHANG Jianjun, LI Yuting, TIAN Ningning, ZHANG Yanting. Analysis and Countermeasures of the Carrying Capacity of Water Resources for Vegetation on the Loess Plateau, Western Shanxi Province, China[J]. Research of Environmental Sciences, 2015, 28(6): 923-929.

晋西黄土高原水资源植被承载力分析及对策建议

基金项目: 国家林业公益性行业科研专项(201304308)

Analysis and Countermeasures of the Carrying Capacity of Water Resources for Vegetation on the Loess Plateau, Western Shanxi Province, China

  • 摘要: 干旱缺水始终是黄土高原地区林业水资源管理面临的难题. 为了探究造成黄土高原地区林水失衡的主要原因,以2009—2012年晋西黄土高原蔡家川流域油松人工林树干液流量与土壤水分长期连续定位观测数据为基础,采用土壤有效水与单株油松耗水量的比值来衡量该区域水资源植被承载力. 结果表明:①在油松人工林实际密度(1 300株/hm2)下,油松人工林过度耗水是深层土壤干化的主要原因;降水量是决定水资源植被承载力的主要环境因子,降水量越大,油松人工林地的水资源植被承载力就越高. ②根据构建的降水量-水资源植被承载力拟合方程,在当地年均降水量为576 mm条件下,研究区20 a林龄油松人工林地水资源植被承载力为1 084株/hm2,而油松人工林地的实际密度远大于该水资源植被承载力. 在黄土高原地区,人工林密度过高是造成深层土壤干化、植被退化等生态恶化的主要原因. 因此,将人工林密度控制在当地水资源植被承载力范围之内,是减少林地深层土壤水分消耗、调节林地水平衡的重要措施.

     

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  • 刊出日期:  2015-06-25

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