| 2000—2014年改则县植被变化及草原保护政策实施效果评价 |
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| 引用本文： | 陈 涛,杜晓辉,拉 巴,拉巴卓玛.2000—2014年改则县植被变化及草原保护政策实施效果评价[J].中国农学通报,2016,32(8):98-103. |
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| 作者姓名： | 陈 涛 杜晓辉 拉 巴 拉巴卓玛 |
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| 作者单位： | (;1.西藏高原大气环境科学研究所,拉萨 850000；;2.拉萨市气象局,拉萨 850000） |
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| 基金项目： | 国家自然科学基金项目“气候变化背景下西藏阿里地区草地退化研究”(41165002)；西藏自治区气象局高原遥感应用技术创新团队建设计划项目。 |
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| 摘 要： | 为评价改则县草原保护政策实施效果，在3S技术支持下，利用2000—2014年MODIS-NDVI资料，结合研究区气象数据、禁牧数据对改则县植被覆盖时空分布进行分析。结果表明：（1）改则县植被覆盖总体较差，多年平均结果植被指数主要分布在0~0.2之间，最大合成结果植被指数主要在0.1~0.3之间，空间分布表现为南部植被覆盖优于北部。（2）改则县夏季植被覆盖最好，春季植被覆盖最差，北部为昆仑山脉植被覆盖季节变化不大。（3）2000—2014年间改则县植被覆盖总体呈稳定状态，呈稳定状态的区域面积占全县总面积的45.46%，呈改善趋势的区域占全县总面积的11.28%，呈退化趋势的区域占全县总的面积的8.69%，改善区域大于退化区域。（4）2008—2014年间改则县降水量及气温变化不利于植被改善，草原保护政策对该县植被改善起到了较好效果。
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| 关 键 词： | ‘库车白杏’ ‘库车白杏’ 树干液流 环境因子 |
| 收稿时间： | 2015/10/14 0:00:00 |
| 修稿时间： | 2015/11/16 0:00:00 |
Vegetation Variation in Gaize County During 2000-2014 and Evaluation of the Grassland Protection Policy |
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| Chen Tao,Du Xiaohui,La Ba and Laba Zhuoma.Vegetation Variation in Gaize County During 2000-2014 and Evaluation of the Grassland Protection Policy[J].Chinese Agricultural Science Bulletin,2016,32(8):98-103. |
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| Authors: | Chen Tao Du Xiaohui La Ba and Laba Zhuoma |
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| Institution: | (;1.Tibet Institute of Plateau Atmospheric and Environmental Science, Lhasa 850000;2.Lhasa Meteorological Bureau, Lhasa 850000) |
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| Abstract: | The paper aims to evaluate the grassland protection policy in Gaize County. Using the 3S technology, MODIS-NDVI data, meteorological data and grazing prohibition data during 2000-2014, the authors investigated the spatial and temporal distribution of vegetation in Gaize County. The results showed that: the vegetation cover was generally sparse and the average NDVI ranged from 0 to 0.2 while the maximum composite NDVI was from 0.1 to 0.3. The vegetation cover in the south part of Gaize County was much better than that in the north part. Summer had the best vegetation cover and spring had the worst. The vegetation had no significant seasonal change in the Kunlun Mountains which was located in the north part of Gaize County. As a whole, the vegetation distribution was quite stable during 2000-2014 in Gaize County. The vegetation stable areas and the areas with improved vegetation cover accounted for 45.46% and 11.28% of the whole county area, respectively, the areas with worsening vegetation cover accounted for 8.69% of the county area. The area with better vegetation was larger than the area with worse vegetation. The variations of precipitation and temperature were not beneficial to the improvement of vegetation during 2008-2014, so the grassland protection policy played a significant role in vegetation amelioration. |
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| Keywords: | Gaize County MODIS-NDVI vegetation variation grassland protection policy |
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