<正>针对海南热带雨林林分特征，提出了新的测度指标体系，对热带雨林树木生长及其竞争的关系进行了研究。结果表明，所提出的生长竞争测度指标能客观地反映林木生长势态，较大地提高了生长模型的估计精度。该研究为进一步揭示热带雨林生长规律，研究稳定、持续的生态系统提供了理论基础。

Based on the characteristics of tropical rain forest, this paper establishes new measures of tree growing competition and deals with the relations of tree growing competition associated with the tree growing models. Two measures of point density in stand are introduced. One is composed of the relative height of central tree in circle sampling plot, which makes known the state of single tree growing competition. The other is the relative volume of tree crown, which the sum of that is a reflection of stand growing competition. The results show the measures can represent states of tree growing competition in tropical rain forest, as modeling variables, which can raise the estimating precision of tree growing models. This study also provides the basic theory and methods for discovering the patterns of trees growing competition and then studying the stability of sustainable system of ecology.