林业科技开发2012，Vol.26Issue(4)：35-38,4.DOI:10.3969/j.issn.1000-8101.2012.04.009
林分密度对侧柏人工林细根形态的影响
Effects of stand density on fine root morphology in Platycladus orientalis plantations
摘要
Abstract
An experiment was conducted to study the effects of stand density on fine root morphology in 50-year Platycladus orientalis plantations in Xuzhou Forest Region. Result showed that, with the ascent of root orders, P. onentalu's mean fine root diameter and length increased significantly (p < 0. 05) , while the mean SRL decreased significantly (p < 0. 05). Stand density had significant influence on root morphology and biomass for Platycladus orientalis plantations (p < 0. 05 ). Compared with the medium stand density (2 250 trees/hm ), the mean length and mean diameter of the first and second order roots of low-density stands(1 700 trees/hm2) in surface sail and the mean length of third order roots of low-density stands in subsurface soil were decreased significantly while the mean SRL of second order roots of low-density stands was increased significantly. The mean SRL of second order roots of high-density stands (3 074 trees/hm2) was increased significantly compared with the medium stand density. Compared with the high-density stand, the mean diameter of the first and second order roots of low-density stands in surface soil were decreased significantly and the fifth order roots of low-density stands was increased significantly.关键词
林分密度/侧柏人工林/根序/细根形态Key words
Stand density/ Platycladus orientalis plantations/ order root/ fine root morphology引用本文复制引用
周伟,陈信力,李瑞霞,闵建刚,徐梅,卢雯,关庆伟..林分密度对侧柏人工林细根形态的影响[J].林业科技开发,2012,26(4):35-38,4.基金项目
国家林业公益性行业科研专项"提高城市森林固碳能力的关键技术研究与示范"(编号:201104075). （编号:201104075）
