南方农业学报2012，Vol.43Issue(5)：662-665,4.DOI:10.3969/j:issn.2095-1191.2012.05.662
经营密度及混交对广西柳杉林分生长的影响
Effects of density and mixed planting on stand growth of Cryptonmeria fortune in Guangxi
摘要
Abstract
[Objective]The effects of density and mixed planting on stand growth in Guangxi Liuwan Forest Farm were studied to provide references for Cryptonmeria fortune planting and rational utilization of forestry resources in Guangxi. [Method]Five plantations were chosen, four of them were pure Cryptonmeria fortune plantations with the densities of 1450,1800,2075 and 2700 trees/ha,respectively,the other one was the plantation mixed Cryptonmeria fortune and Cunningham (7:3) with the density of 1430 trees/ha. Average height, diameter at breast height (DBH), canopy, individual volume and stand stock of the chosen three sampling plots in each plantation were investigated and analyzed. [Result]Av-erage DBH, canopy. height/diameter and individual volume tended to decrease with the increasing density The densities showed obvious effect on distribution of DBH, the larger the density, the earlier DBH class peak. The stand stock for the four pure Cryptonmeria fortune plantations followed the trend; 1450 trees/ha>2075 trees/ha>1800 trees/ha>2700 trees/ha. All the stand factors of growth in the mixed plantation were superior to that in any pure plantation. Compared to the pure plantation with similar density (1450 trees/ha), the individual volume increased by 47.3% and the stand stock increased by 32.0% in mixed plantation. [Conclusion ]Mixed plantation of Cryptonmeria fortune and Cunningham is recommended to boost forest productivity.关键词
柳杉/密度/混交/林分生长/影响Key words
Cryptonmeria fortune/ density/ mixed plantation/ stand growth/ effects分类
农业科技引用本文复制引用
蒋林,廖承锐,陈丽芳,莫小刚,温天成,杨梅..经营密度及混交对广西柳杉林分生长的影响[J].南方农业学报,2012,43(5):662-665,4.基金项目
国家自然科学基金项目(31070560) （31070560）
"十一五"广西林业科技项目(桂林科字[2009]第23号) （桂林科字[2009]第23号）
