MODELLING THE NET PRIMARY PRODUCTIVITY OF THE NATURAL POTENTIAL VEGETATION IN CHINA
MODELLING THE NET PRIMARY PRODUCTIVITY OF THE NATURAL POTENTIAL VEGETATION IN CHINA
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发表时间：
1998
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通讯作者：
Sun Cheng
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作者：
Sun Cheng
研究了中国自然潜力植被净初级生产力（NPP）与其气候控制的关系。首先，利用气候台站资料插值计算了站点水平衡指数。NPP田间资料与生长期实际蒸散量、年实际蒸散量、年潜在蒸散量和缺水指数呈显著正相关。然后，根据NPP积累的机理，在收集全国NPP现场资料和站点水平衡指数相互作用的基础上，建立了WBINPP模型：NPP=2.55 GAE·e -4.20922-1.9665·AI。与Miami、Thornthwaite Memorial和Chikugo等其他NPP模型相比，WBINPP模型更为合理，与现场文献拟合强，相关系数为0.845。基于WBINPP模型，利用GIS软件EIS对中国NPP进行了空间格局分析，结果表明NPP从东南向西北呈递减趋势。海南、台湾地区的NPP值最大，在22 t·hm -2 -1以上；长江中下游地区、华北平原地区和东北地区分别为12~16、8~12、4~8 t·hm、-2 -1。北部草原区NPP约为2 t·hm -2 -1 -1，干旱沙漠区NPP低于2 t·hm -2 -1
The relationship between net primary productivity (NPP) of natural potential vegetation in China and its climate control has been studied. First, site water balance indices are calculated by means of climate station document interpolation. NPP field document is strongly correlated with actual evapotranspiration in growth period, annual actual evapotranspiration, annual potential evapotranspiration and water deficiency indices. Then according to the mechanism of NPP accumulation, a WBINPP model is developed basing on a collection of NPP field document all over the country and site water balance indices interaction: NPP=2.55 GAE·e-4.20922-1.9665·AI. Comparing with other NPP models, such as Miami, Thornthwaite Memorial and Chikugo, WBINPP model is more rational and strongly fit to field doccment, the correlation coefficient is 0.845. According to WBINPP model, a spatial pattern analysis for NPP in China is conducted by means of a GIS software, EIS, and the result shows NPP is declined from Southeastern China to Northwestern China. NPP of the greatest value is above 22 t·hm-2·a-1 in the region located in Hainan and Taiwan Province; while with different values of 12～16, 8～12, 4～8 t·hm-2·a-1 in the region of middle and lower reaches of Yangtze River, the Northern China plain and the Northeastern Region in China, respectively. In the Northern steppe zone NPP is about 2 t·hm-2·a-1 and in the dry desert zone is lower than 2 t·hm-2·a-1.