樟子松优良采种林分划分方法的研究

A Method of Classifying Good Seed Stand of Pinus sylvestris L.var. mongolica Litv.

本文将林木树种单株选优原则和方法运用到林木群体选择和划分上。注意林木单株的数量指标(生长量指标)和质量指标(形质指标)的结合;把对林木生长量有直接关系的形质指标,作为单株评价的一部分,考虑在单株选择之中,作为提高单株选优质量和准确性的根据。由此将林分树木划分为4级,再根据4级林木的比例而对林分进行分级。进而划分了种子林分,这对当前采种基地的划分和建立有着重要参考价值。

This paper describes a method which has been used for stand population selection and classification based on the plus trees selection principle of a single tree.The combination of the quantity index (growth index) with the quality index (morphological index) of a single tree has been observed.The morphological index when correlated linearly with tree growth in single tree evaluation of plus trees selection is thought to be a basis for increasing accuracy and quality of selected trees.Seed stand classification can be determined by stand classification based on the ratio amongst trees which are divided into four classes.The method will benefit seed stand classification and establishment