宝天曼自然保护区主要树木种群竞争数量关系

The Quantitative Relation of the Main Tree Population Competition in Baotianman Natural Reserve Area

为了研究宝天曼地区主要树木种群在群落中的竞争干扰状态,应用53株对象木及其竞争木的调查数据,采用Hegyi单木竞争指数模型,对锐齿栎和化香树木种群的种内和种间竞争数量关系进行了定量分析。结果表明,锐齿栎树木种群的种内竞争大于种间竞争,化香树木种群的种内竞争小于种间竞争。对距对象木2、4、6、8m范围内的竞争强度计算结果表明,锐齿栎和化香种群竞争强度最大值均出现在0～2m的范围内。对象木竞争强度与胸径大小的关系服从幂函数曲线模型,且胸径达到20cm后竞争强度的明显减小。

In order to study the competition interference state of main species in forestry community in Baotianman area, applying 53 object tree and the competitive tree＇s survey data, using Hegyi individual tree competition index model, the quantitive relation of intra-specific and inter-specific competition in platycarya strobilacea and var.acuteserrata was quantitatively analyzed. The result shows that inter-specific competition of var.acuteserrata populations is greater than intra-specific competition, and intra-specific competition of platycarya strobilacea is less than inter-specific competition. The calculation of competition intensity from the object within the scope which on wood 2,4,6,8 m shows that the greatest competition intensity of var. acuteserrata and platycarya strobilacea appears in the 0-2 m scope, object tree competitive strength and size of the diameter between obeying the power function of the form, and reached 20 cm diameter at breast height after the intensity of competition in the rate decreases.