黑龙江省植被净第一性生产力动态分析

摘要

Based on climate data,Thornthwaite model was used to calculate the net primary production (NPP) value of Heilongjiang Province in 1972,1988 and 2004.The whole distributions of NPP in these three periods were got by the spatial interpolation method,and then dynamic changes of NPP and space distribution were discussed.The results showed that the NPP values in middle east and south region of Heilongjiang Province,China are significantly higher than those in other regions,and the change trend of NPP values is consistent with that of mean temperature and rainfall.According to dynamic contrast analysis,the NPP values in Heilongjiang Province decreased obviously during past 30 years.There are significant differences among different regions.The NPP value in Southwestern areas with little rainfall,such as the areas of Qiqihaer,Tailai and Fuyu,is decreasing,and ones in the Northwestern region are also decreasing with little recovery.There are significant linear relationship of monotone increasing between NPP and rainfall,and significant relationship between NPP and mean temperature.%利用气象数据,采用Thornthwaite模型计算了黑龙江省1972、1988、2004年3个时期的植被净第一性生产力(NP,P),利用地理信息系统空间插值的方法获得了黑龙江省3个时期的NP,P空间分布,并进一步对其动态变化及空间分布情况进行了分析.结果表明,黑龙江省中东部和南部气候湿润地区NP,P值明显高于其它地区,这与年平均气温和年降水量的变化趋势一致.根据动态对比得出,30多年来,黑龙江省的NP,P值总体上呈现明显的逐年下降趋势,地区变化明显.如:西南部的齐齐哈尔、泰来、富裕等降水量稀少的地区,NP,P一直在降低；西北部地区NP,P也在下降,但近年有小幅回升.通过研究表明:NP,P与年降水量之间呈单调递增的显著线性关系,与年平均气温之间相关显著.