不同神群密度关态下羊草地上部生态场、生态势、场梯度及其季节性变化规律研究  

REGULARITY OF THE ECOLOGICAL POTENTIAL AND GRADIENT OF ABOVEGROUND ECOLOGICAL FIELD OF ANEUROLEPIDIUM CHINENSE AND THEIR SEASONAL CHANGES UNDER DIFFERENT POPULATION DENSITIES

作　　者：王德利[1] 祝廷成[1] 

机构地区：[1]东北师范大学草地研究所

出　　处：《生态学报》1996年第2期121-127,共7页Acta Ecologica Sinica

基　　金：国家自然科学基金

摘　　要：本文通过对羊草种群与个体的定位观测与理论分析，给出了描述植物生态属性质的场特征函数──生志势和场梯度的定义，建立了羊草地上部生态场的生态势和场梯度模型。应用实验观测数据进行了模型运算，分析了草草地上部生态场随作用距离改变的生态势与场梯度变化规律。结果表明，羊草地上部场势与场源植物的相对生长速率、资源利用效力以及种群密度相失，场梯度能刻划生态势的空同变化速率，生态势和场梯度均有季节性变化特征。in the present paper, the concepts of ecological potential and field gradient, whichdescribe the ecological field characters, were defined by means of long-term observation andmeasures of Aeurolepidium chinense population and its individuals as well as relevant theoreticalanalysis. The models for ecological potential and field gradient of aboveground part of A. chinense were put forward. The models were run by using experimental data. Regularity, bywhich the field potential and the field gradient of the aboveground ecological field of A. chinensechanged with varying action distance, was analyzed. The results show that the aboveground ecological potential size of A. chinense was related to the relative growth rate of field plants, toresource utilization efficiency in the ecological field and to population density. The ecologicalfield gradient can be used to describe the spatial changing rate of the ecological potential. Both ecological potential and field gradient varied among seasons.

关 键 词：羊草 生态场 生态势 场梯度 

分 类 号：Q949.714.2[生物学—植物学]