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通过对１１种竞争指标及其与胸径生长量相互关系的分析，将竞争指标划分为四类，它们从不同侧面反映了个体竟争状况，个体竞争能力取决干自身在群体中的相对位置及生长发育状况和邻体对它的干扰程度。逐步回归分析表明，阳冠比率是影响马尾松生长的主导因子。文中还建立了主要竞争指标如生长空间指数、邻休干扰指数、阳冠比率与胸径生长量的数学模型，并对这些模型的生态学意义及其在营林中的应用进行了初步探讨．
Through the analysis of 11 kinds of competition indexes and their relationship with the DBH growth, the competition indexes are divided into four categories. They reflect the individual competition status from different aspects. The individual competitiveness depends on their relative position in the community and their growth Developmental status and the level of interference with its neighbors. Stepwise regression analysis showed that the ratio of Yangguan to affect the growth of Pinus massoniana dominant factor. The paper also established the main competition indicators such as growth space index, adjacent disturbance index, crown-crown ratio and DBH growth mathematical model, and the ecological significance of these models and their application in forest management were discussed.