黑荆树造林密度试验  

Experiment on Stand Density of Acacia mearnsii Plantation

作　　者：郑芳楫[1] 高传璧[1] 朱永元 任华东[1] 方玉霖 李纪元[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,江苏省常熟市虞山建设委员会,福建省漳州市林业科技推广站

出　　处：《林业科学研究》1994年第6期595-599,共5页Forest Research

基　　金："七五"林业部合同项目

摘　　要：对黑荆树１～５年生人工林分在２．０ｍ×２．０ｍ（Ａ）、２．０ｍ×１．５ｍ（Ｂ）、２．０ｍ×１．０ｍ（Ｃ）、１．５ｍ×１．０ｍ（Ｄ）和１．０ｍ×１．０ｍ（Ｅ）５种密度下的生长、发育规律及其经济效益的研究结果表明：树高、胸径生长及其经济效益（产出／投入比），随密度增大递减；单位面积树皮和木材产量随密度增大递增，但增幅随林龄增大减小；林分的数量成熟期随密度增大缩短，间伐期也随之提早。Ａ、Ｂ密度为皮材兼用林最佳的造林密度；Ｃ、Ｄ和Ｅ可考虑作为经营能源林的造林密度。This paper deals with the stand growth,development and economic return of black wattle(Acacia mearnsii)planted at spacings ranging from 1 m×1 m to 2 m×2 m at the age of 5 years old.The results showed that the height,diameter increment and economic re-turn(judged by output/input)decreased as density increased;bark and wood yield per unit area increased with the increase of stand density while their increment ranges were smaller in old stands. The stands planted with denser spaeings matured earlier and their thining time was earlier too. Stands of lower densities(treatment A and B)are desirable for producing bark and timber.On the other hand,stands of higher densities(treatments C,D and E)are suitable for establishing fuelwood plantations.

关 键 词：黑荆树 造林 密度 生长量 效益 

分 类 号：S792.990.5[农业科学—林木遗传育种]