| 2000—2012年青海共和盆地植被净初级生产力空间变化特征分析 |
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| 引用本文： | 刘瑛,贾志清.2000—2012年青海共和盆地植被净初级生产力空间变化特征分析[J].中国农学通报,2014,30(31):229-234. |
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| 作者姓名： | 刘瑛 贾志清 |
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| 作者单位： | 中国林业科学研究院,中国林业科学研究院 |
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| 基金项目： | 林业公益性行业科研专项经费项目“高寒沙地防护林生态服务功能研究”(201204203) |
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| 摘 要： | 为了分析青海共和盆地植被初级生产力的变化特征，为该区植被资源管理及相关环境保护政策的制定提供科学依据。基于GIS技术，利用2000至2012年MOD17A3数据集的植物净初级生产力(NPP)数据分析了该地区植被NPP的时空变化特征。结果表明，青海共和盆地植被年均NPP的平均值为103.3 g C/(m2·a)，最低为369.3 g C/(m2·a)，最高为482.1 g C/(m2·a)。5种植被类型中，草甸年均NPP值最大,为128.8 g C/(m2·a)；灌丛的年均NPP值最小，为34.9 g C/(m2·a)；与2000年相比，2012年青海共和盆地年NPP大部分地区是增加的，年NPP减少的面积仅占总面积的0.68%；NPP的线性变化趋势以增加为主，NPP呈减少趋势的地区仅占总面积的0.7%，说明该地区的植被状况得到较好的改善。
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| 关 键 词： | 马铃薯 马铃薯 功能叶片 SOD CAT POD MDA |
| 收稿时间： | 2014/6/23 0:00:00 |
| 修稿时间： | 2014/6/23 0:00:00 |
Analysis of Variation Characteristics of Vegetation Net Primary Productivity in Gonghe Basin from 2000 to 2012 |
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| Liu Ying,Jia Zhiqing.Analysis of Variation Characteristics of Vegetation Net Primary Productivity in Gonghe Basin from 2000 to 2012[J].Chinese Agricultural Science Bulletin,2014,30(31):229-234. |
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| Authors: | Liu Ying Jia Zhiqing |
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| Institution: | (Institute of Desertification Studies, Chinese Academy of Forestry, Qinghai Gonghe Desert Ecosystem Research Station, Beijing 100091) |
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| Abstract: | In order to analyze the vegetation net primary productivity（NPP） in Gonghe Basin and to provide the basis for vegetation resource management and environment protection policy establishment, based on GIS technology, a quantitative analysis was conducted on the spatiotemporal characteristics of vegetation net primary productivity（NPP） in Gonghe Basin. Average annual vegetation NPP data of MOD17A3 dataset from 2000 to 2012 were used. Results showed that the Basin average annual NPP was 103.3 g C/（m^2·a）, ranged from 369.3 g C/（m^2·a） to 482.1 g C/（m^2·a） during the 13 years. In terms of the average annual NPP of the main vegetation types in the Gonghe Basin, meadow had the highest value of 128.8 g C/（m^2·a）, and the lowest NPP value 34.9 g C/（m^2·a） was found in shrub. Compared with that in 2000, the annual NPP in most part of the basin in 2012 increased,the area with decreased NPP value only accounted for 0.68% of the total area of the basin. The increase of the annual NPP in the basin was mainly in linear type, and the area with NPP decrease only occupied 0.7% of the territory of the basin. The result proved that the vegetation was improved in the basin from 2000 to 2012. |
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| Keywords: | net primary productivity (NPP) MOD17A3 Gonghe Basin of Qinghai Province |
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