邻体干扰指数模型的改进及其应用研究

STUDY ON THE IMPROVEMENT AND APPLICATION OF THE NEIGHBORHOOD INTERFERENCE INDEX MODEL

在前人研究工作基础上提出邻体干扰指数的改进模型 Hw =∑ni=1SaSbi ScddSei ,以马尾松人工林邻体干扰为对象探讨了改进模型的具体应用 ,并与前人提出的主要模型进行了比较分析。实例应用结果表明 ,改进的指数模型能够解释马尾松人工林生长速度变异的 83%左右 ,因此可以说改进模型优于原先的指数模型 ,具有更大的适用性和灵活性 ,可在植物邻体干扰研究中应用。马尾松人工林邻体干扰的灵敏度分析表明 ,基株大小对邻体干扰指数的影响较邻体大小和基株到邻体之间距离更灵敏 。

Based on the previous works, an improved model for neighborhood interference index was put forward: H\-w=∑ni=1S aS\+b iS\+cd dS\+e i, where S is the size of subject individual; S i is the size of i th neighbor; d i is the distance to the i th neighbor; n is the number of neighbors. Pinus massoniana was treated as a test object. The application of the improved neighborhood inference index was researched, and its effects with other main neighborhood inference index models presented by previous works were compared and analyzed. The applied example showed that the improved model could account for 83% of the variation in the growth rate of Pinus massoniana, the result indicated that the improved model was applicable and flexible. The sensitive rate analysis showed that the effect of the subject individual size on neighborhood interference index was greater than other factors, which means the size of subject individual was the main affecting factor on neighborhood interference index of Pinus massoniana.