鄂尔多斯高原生态过渡带气候特殊性和气候植物生长指数与畜牧业生产动态分析

鄂尔多斯高原位于我国典型的生态过渡带，气候变化明显，系统反应敏感，因此，现有的主要用于植被和气候空间分类的有关植物与气候关系的模型和指数，均不适合用于鄂尔多斯高原生态过渡带气候。植物动态分析。为此，本文利用位于鄂尔多斯高原中部的伊金霍洛旗３９ａ（１９５３－１９９１）气象资料，分析该地区的气候特点，构建一个可用于描述生态过渡带气候特征的气候植物生长指数，并用与植被动态密切相关的天然放牧条件下（１９５８－１９７９），该旗牲畜的存栏数和出栏数的历史资料代替植被动态资料，进行鄂尔多斯气候植物生长指数与天然放牧条件下牲畜的存栏数和出栏数的动态分析，构建其ＡＲＭＡＸ模型。研究结果表明，鄂尔多斯高原气候敏感易变，降水年际变化大；高原光、温、水配合并不完全一致，光、温超前，降水滞后，天然植被生产力不高；气候植物生长指数与畜牧生产的动态分析结果表明，该地区在天然放牧情况下，主要依赖于牧场植被长势的畜牧生产与气候－植物生长指数密切相关，说明构建的气候植物生长指数确实在一定程度上反映了该地区的气候与植物生长的关系￣（６－８）。

STUOY ON THE CHARACTERISTICS OF CLIMATE AND THE DYNAMICS OF CLIMATE-PLANTS GROWTH INDEX(CPGI)AND SHEEP HUSBANORIAL PRODUCTION IN THE ECOTONE ON THE ORDOS PLATEAU

t was found that all of the existing models and in dexes for climate-plants relahonshipwhich were tnainly used in the spatial classification of vegetation and climate were not suit-able to analyze the dynamics of climate and plants in the ecotone on the Ordos Plateau whichis typical in north China with an obviously changed climate a response-sensitive ecosystem.For this reason,a climate-plants growth index(CPGI)which can be used to describe thecharacteristics of climate in the ecotone was constructed,based ...