Estimation on net primary productivity of vegetation in karst area of Guizhou province
Estimation on net primary productivity of vegetation in karst area of Guizhou province
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发表时间：
2007
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通讯作者：
Wang Yu-juan
中科院分区：
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作者：
Wang Yu-juan
在光能利用效率模型的构建上，利用遥感技术，利用MODIS数据和气象资料，估算了贵州省2001年植被净第一性生产力（NPP）。通过岩溶区与非岩溶区的对比，重点研究了岩溶区净初级生产力的时空变化规律。结果表明：（1）岩溶区与非岩溶区的时空变化存在明显差异。非岩溶区NPP平均值比岩溶区大13.3%。(2)岩溶区频率分布呈双峰型，非岩溶区频率分布呈正态分布。(3)年NPP最大值和最小值均出现在7月和1月，但岩溶区NPP的波动性大于非岩溶区。(4)喀斯特地区净初级生产力的季节空间变化显著。严重石漠化地区NPP较低，且NPP随季节的波动性较明显。
On the construction of light use efficiency model, by means of RS technology and using MODIS data and meteorological data, the net primary productivity (NPP) of vegetation in Guizhou in 2001 is estimated in the paper. By the comparison between karst area and non-karst area, spatial-temporal variations of NPP in karst area are studied mainly. It is concluded that: (1) There are obvious differences on spatial-temporal variations between karst area and non-karst area. The mean NPP in non-karst area is 13.3% larger than that in karst area. (2) The frequency distribution in karst area takes on double-peak style, while in non-karst area normal school style. (3) Both maximum and minimum NPP present in July and January annually, but the fluctuation of NPP in karst area is larger than that in non-karst area. (4) Seasonally spatial change of NPP in karst area is prominent. NPP is lower than other areas and fluctuation of NPP with seasons are more obvious in area of seriously rock-desertification.