【摘要】 矢量竞争分析法是一种用于评价存在相同资源竞争的两种植物种之间的生长和营养交互作用的图形分析方法 .它基于矢量分析和线性分析 ,将代表生物量和营养吸收值的参数相对于无种间竞争的对照在一个两维的坐标系内表达为矢量并进行定位比较 .应用该方法对北京西山地区的 4 4年生人工混交林中油松和侧柏树种间生长和营养 (N ,P和K)吸收状况进行了比较和分析 .研究表明虽然混交有利于侧柏生物量的相对增加 ,但伴随有植物体内营养元素的相对亏缺 .相反 ,混交对油松生物量和高、径生长的抑制作用却伴随有营养元素吸收相对过剩 .以上结果表明矢量竞争分析可用于正确地揭示混交林树种之间营养交互作用更多还原

【Abstract】 Vector Competition Analysis is a graphical diagnostic approach based on vector analysis and regression analysis that assess growth and nutrient interactions between two species competing for the same resources. Response parameters are compared in a bivariate model that graphically depicts vectors of changing biomass production or nutrient uptake relative to competition free treatment. In this paper, a 44 year old mixed plantation of two tree species ( Pinus tabulaeformis and Platycladus orientalis ) was compared with competition free pure stands for their biomass production and nutrient (N, P and K) uptake using this new technique. Although the mixture is in favor of the biomass production of Platycladus orientalis, nutrient deficiency of Platycladus orientalis apparently occurred at the present stage. In contrast, growth of Pinus tabulaeformis was suppressed and the inhibitory effect for growth of Pinus tabulaeformis was associated with excessive nutrient uptake. These results have demonstrated the potential of vector competition analysis to quantify the tree nutrient interactions in a mixed plantation.更多还原