福建林学院学报2009，Vol.29Issue(4)：340-344,5.
杉木中密度幼林光环境与生长修枝效应
Effect of pruning on stands light environment and growth of middle-density Chinese fir young plantations
摘要
Abstract
The dynamics of light environment and leaf area index (LAI) of Chinese fir young plantations under the condition of different pruning height treatment were studied using canopy analyzer LAI-2000, and the effects of pruning on stands growth were discussed. Four main conclusions were gotten. (1)Pruning obviously improved stands light transmission rate, the canopy light transmission rate increased with the increasing of pruning intensity, and the bigger the pruning intensity was, the more obvious the restoration trendency of canopy light transmission rate was with the stands growth. (2)Pruning obviously decreased LAI, LAI presented a linear descent with the increasing of pruning intensity, the increasing percent of LAI was higher for stands with high pruning intensity than ones with low pruning intensity, and the effect degree of pruning on LAI was far lower than on canopy light transmission rate. (3)Pruning intensities had not produced significant effect on gross growth for every other one row pruning treatment, the excessive pruning could significantly decrease the breast-height diameter of the pruning trees, but had not significant effect on height. (4)Only with the 20% leaf area loss, the 40% pruning intensity could make canopy light transmission rate increase one times or so, and this pruning intensity hadn't significant effect on timber volume of the pruning trees.关键词
杉木幼林/中密度/修枝强度/透光率/叶面积指数Key words
young stands of Chinese fir/middle density/pruning intensity/light transmission rate/leaf area index分类
林学引用本文复制引用
段爱国,赵世荣,章允清,赵克昌,张建国..杉木中密度幼林光环境与生长修枝效应[J].福建林学院学报,2009,29(4):340-344,5.基金项目
国家"十一五"科技支撑计划资助项目(2006BAD24B03) （2006BAD24B03）
中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金科技服务林改专项基金资助项目(CAFYBB2008014). （CAFYBB2008014）
