亚热带农业研究2016，Vol.12Issue(2)：79-85,7.DOI:10.13321/j.cnki.subtrop.agric.res.2016.02.002
不同坡位马占相思人工林生长量、生物量及生长过程分析
A comparative study on growth rate, biomass production and growth process of Acacia mangium at different hilly slopes
摘要
Abstract
The growth and biomass production of 17 year￣old Acacia mangium at different hilly slopes were comparatively studied on Tingxi State￣owned Protection Forest Farm of Tong′an in Fujian province. The result showed the following: 1) At different hilly slopes, there were highly significant differences among tree heights, significant difference among biomass volumes, but no significant difference among the diameter at breast height. The tree growth was the best at downhill slopes, better at mid￣hill slopes, and the worst at the uphill slopes. 2) Average biomass productions also showed significant differences at different slope positions in order of stem > main root > branch > leaf. The minimal biomass production was on lateral and fine roots. Overall aboveground and under￣ground biomass productions were in the order of downhill slope > mid￣hill slope > uphill slope. The higher biomass production of downhill A.mangium forest was due to relatively high moisture content and adequate soil nutrients of the downhill trees. 3)A similar growth pattern was observed for A.mangium trees at different hilly slopes:The total growth, including the diameter at breast height, tree height, and wood volume of single tree, increased rapidly at first, but then slowed down to sustained growth over time. As trees aged, the growth rate decreased rapidly first but turned to gradually later. 4) Statistical fit test results of regression equations on the diameter at breast height, tree height and single tree wood volume were extremely significant with a relatively higher accuracy, impl￣ying that these regression equations could be used to assess the growth of A.mangium trees at hilly slopes.关键词
马占相思/坡位/生长量/生物量/生长过程Key words
Acacia mangium/hilly slope position/growth/biomass/growth process分类
农业科技引用本文复制引用
卢佳毅..不同坡位马占相思人工林生长量、生物量及生长过程分析[J].亚热带农业研究,2016,12(2):79-85,7.基金项目
国家自然科学基金项目(41176092)；福建省林业厅项目(闽林科〔2009〕8号)；福建省属公益类科研专项(2014R1011￣7)。 （41176092）
