应用 聚集度 指标、Iw ao 方 程和 T ay lor 幂法 则模型 等测 定方法 研究珍 稀濒 危植物 长苞 铁杉(T sugalo
ngibracteata Cheng)的空间分布格局。 结果表明, 长苞铁杉的空间分布呈随机分布。 文中还根据 Iwao 的 M ^＊与 x
的回归方程, 计算长苞铁杉在不同密度和允许误差下的理论抽样面积。
 

The spatial distribution pattern of the endangered and rare plant Tsuga longibracteata Cheng was studied using aggregate index and Iwao' s equation and Taylor' s model .The results showed that the spatial distribution pattern of Tsuga longibracteata Cheng was random pattern in population . According to Iwao' s equation , the theoretical sampling area of forest survey were analyzed and calculated under different population densities and allow ing errors .