马占相思人工实生林立木干形研究  

A Research on the Stem Form of Acacia mangium Seedling Plantation

作　　者：陆道调[1] 吴保国[1] 秦武明[2] 戴军 

机构地区：[1]北京林业大学,北京100083 [2]广西大学林学院,广西南宁530004 [3]广西国有高峰林场,广西南宁530001

出　　处：《中南林学院学报》2005年第2期21-24,共4页Journal of Central South Forestry University

摘　　要：　为掌握马占相思人工林立木干形变化的规律性,实测431株样木并采用多个干形指标进行了比较研究.结果表明:实验形数变动系数最小,其变动系数为8.55%;实验形数的调查平均值0.3868,比目前区内使用的阔叶树数值(0.4000)呈一定的偏小;正形数系列中,以1/4树高以下变动系数较小,2/10、1/10树高处形数及胸高形数的变动系数分别是8.69%、10.63%、和9.68%;胸高形数、胸高形率以及树高间呈双曲线关系,相关关系紧密.<Abstrcat> Based on 431 Acacia mangium plantation felled sample trees, a few stem form factors have been calculated and compared with each other in order to find out the tree stem form regularity. The results are as follows: The coefficient of alteration in experiment form factor is minimum and most steady, its value is 8.55%. The value of experiment form factor averages 0.386 8, which is slightly smaller than the broadleaved tree mean number (0.400 0 ) used in the district at present. The C.A of normal form factor blow 1/4 tree height is relatively less than that of the over-stem position, and the mean number is 8.69%, 10.63%, and (9.68%) respectively for 2/10, 1/10 relative tree height and the breast height. The relationship between breast height form factor, breast height form quotient, and tree height can be significantly expressed as quadratic correlation curve form.

关 键 词：森林经理 马占相思 正形数 实验形数 正形数 广西 

分 类 号：S727.1[农业科学—林木遗传育种]