希拉穆仁草原退化评价及地表风蚀颗粒表征

发布时间：2018-02-25 20:02

本文关键词： 荒漠草原退化程度土壤粒度组成判别标准　出处：《水土保持研究》2016年05期 　论文类型：期刊论文

【摘要】：经过对希拉穆仁草原围封、自由放牧草地及旅游区进行实地调查,结合内蒙古自治区第5次荒漠化和沙化监测实施细则,根据植被盖度和生物量等指标对草原进行了退化诊断与评价,并在此基础上研究了不同退化程度的地表粗粒组成。结果表明:希拉穆仁草原围封草地以轻度退化为主,自由放牧区以中度退化为主,但在坡顶出现重度退化,旅游区退化程度最为严重,均为重度退化区;可以以土壤颗粒0.84mm的百分比含量作为草原退化的判别标准,当其含量在82.22%~89.04%范围内为重度退化,含量在74.01%~79.53%为中度退化,含量在56.05%~66.11%为轻度退化。该指标能够直观、实时地反映草原的退化状况,且具有简便、快速诊断的生产应用性。
[Abstract]:After a field investigation of the enclosed and freely grazing grasslands and tourist areas of the Xilamuren grassland, combined with the rules for the fifth monitoring of desertification and desertification in Inner Mongolia Autonomous region, According to vegetation coverage and biomass, the grassland degradation was diagnosed and evaluated, and the surface coarse grain composition of different degradation degree was studied. The results showed that the grassland enclosed in Xilamuren grassland was mainly slightly degraded. In the free pasturing area, moderate degradation was dominant, but severe degradation occurred at the top of the slope, and the most serious degradation was in the tourist area, and the percentage content of soil particles (0.84mm) could be taken as the criterion of grassland degradation. When the content was 82.220.04%, 79.53% was moderately degraded, and 66.11% was slightly degraded. The index could reflect the degradation of grassland directly and in real time, and had a simple and rapid application.
【作者单位】：内蒙古农业大学生态环境学院;内蒙古鄂尔多斯市达拉特旗水保工作站;
【基金】：教育部新教师基金“退化草原风蚀地表粗粒化过程及数字影像判读”(20131515120017) 内蒙古教育厅重点项目“基于数字图像处理技术的荒漠草原地表风蚀研究”(2013MS0613) 中科院西部之光“内蒙古中西部荒漠草原地表粗粒化过程研究”
【分类号】：S157.1

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