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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
Vector competition analysis is a graphical analysis method for evaluating the growth and nutrient interactions between two plant species in the presence of the same resource competition based on vector analysis and linear analysis that compares parameters that represent biomass and nutrient absorption values The interspecific competition controls were expressed as vectors and compared in a two-dimensional coordinate system.The growth and nutrition of Pinus tabulaeformis and Platycladus orientalis in the 4 4-year-old mixed forest in Xishan, Beijing (N, P and K) were compared and analyzed.The results showed that although the hybrid was beneficial to the relative increase of the biomass of Platycladus orientalis, it was accompanied by the relative deficit of nutrient elements in the plant.Contrast, Growth inhibition is accompanied by a relative excess of nutrient absorption.The above results show that vector competition analysis can be used to correctly reveal the nutrient interaction between species in mixed forest