| 陕北毛乌素沙地生态修复效果分析 |
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| 引用本文： | 朱刚.陕北毛乌素沙地生态修复效果分析[J].中国地质灾害与防治学报,2021,32(6):90-97. |
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| 作者姓名： | 朱刚 |
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| 作者单位： | 中国煤炭地质总局航测遥感局，陕西 西安 710199 |
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| 基金项目： | 中国地质调查局地质调查项目“全国冰川及荒漠化遥感地质调查”（DD20190515） |
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| 摘 要： | 应用“3S”技术与土壤化学方法，对毛乌素沙地榆林市境内区域的沙质荒漠化土地进行了近45年来变化研究与生态修复效果分析，研究结果表明:研究区土地的沙质荒漠化强度以轻度、中度为主，治理方式以人工修复为主；1975—2019年沙质荒漠化的分布面积与强度呈现先快速发展而后逆转的变化特征。其中，1975—2007年沙质荒漠化的发展与过度放牧、荒地开垦及矿产资源开发等人类活动及强度密切相关。2007—2019年的逆转与生态调控政策及治理工程的实施密切相关。人工修复地区的土壤养分含量优于自然修复地区，在同等背景的自然修复条件下，不同成因的沙质荒漠化土地土壤养分含量有一定区别。采用人工修复与自然修复相结合的方式，以人工修复促进植被自然修复能力，是研究区有效的生态修复方式。
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| 关 键 词： | 沙质荒漠化土地 遥感 土壤养分 生态修复 |
| 收稿时间： | 2021-02-28 |
Analysis on ecological restored effect of Mu Us sandy land in northern Shaanxi |
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| Institution: | Aerial Photogrammetry and Remote Sensing Bureau of China National Administration of Coal Geology, Xi'an, Shaanxi 710199, China |
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| Abstract: | The "3S" technology and soil chemical methods were used to study the change and ecological restored effect of sandy desertification land in Yulin City of Mu Us sandy land during the past 45 years. The results show that: the intensity of sandy desertification land in the study area was mainly mild and moderate, and the restored mode was mainly artificial restoration; the distributed area and the intensity of sandy desertification land from 1975 to 2019 showed the desertification developed rapidly and then deteriorated, the development of sandy desertification from 1975 to 2007 was closely related to human activities such as overgrazing, wasteland reclamation and mineral resources development, and the reversal from 2007 to 2019 was closely related to the implementation of ecological control policies and control projects; the soil nutrient content of the artificial restored area was better than the natural restored area, the different causes of sandy desertification land was very different under the same natural restored conditions; combined the artificial restored method and the natural restored method, artificial vegetation construction is proved to be a effective way to promote natural vegetation restoring and ecological restoration in the study area. |
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