文献类型：期刊文献

中文题名：杉木林分蓄积生长的密度及立地效应

英文题名：Effects of Planting Density and Site Quality on Stand Volume of Chinese Fir Plantation

作者：相聪伟[1] 张建国[1] 段爱国[1] 张雄清[1]

第一作者：相聪伟

机构：[1]中国林业科学研究院林业研究所

年份：2014

卷号：27

期号：6

起止页码：801-808

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家"十二.五"科技支撑专题"杉木三代育种技术研究与示范"(2012BAD01B0201);林业行业标准制修订项目"杉木大径材培育"(2014-LY-055)

语种：中文

中文关键词：年平均生长量;杉木;初植密度;立地质量

外文关键词：mean annual increment; Cunninghamia lanceolata （Lamb.） Hook.; planting density; site quality

分类号：S757.9;S791.27

摘要：采用3参数Weibull生长方程,对15块杉木密度试验林26年连续观测数据进行分析,计算了林分材积年平均生长量(MAI,包括净材积年平均生长量(MAInet),总材积年平均生长量(MAIgross));利用相关分析及逐步回归分析,研究了林分净材积(Vnet)和总材积(Vgross=Vnet+枯死木材积累积(∑Vm))年平均生长量的峰值及峰值林龄与初植密度、立地质量的关系。结果表明:(1)MAInet峰值与立地指数呈显著正相关,而受林分密度影响很小,其在立地指数级22 m的样地内平均值比立地指数级12 m的样地增加了8.33 m3·hm-2·a-1;MAIgross峰值与立地质量及林分初植密度均呈正相关(r=0.813 5,p=0.000 4;r=0.926 1,p=0.000 0);(2)MAInet峰值林龄主要受初植密度的影响,初植密度太大或太小对MAInet峰值林龄有显著影响,E密度(1 m×1 m)样地的MAInet峰值林龄平均值比A密度(2 m×3 m)样地的小3.88年,而中间密度的MAInet峰值林龄变化不明显。
In this study,3-parameter Weibull growth equation was used for modeling the mean annual increment （MAI）,including mean annual gross increment （MAIgross） and mean annual net increment （MAInet）,of 26-year-old Chinese fir （Cunninghamia lanceolata） experiment plantation.The relationship between the maximum value of MAI and the site index and planting density,and the relationship between the culmination age of MAI and these two factors were analyzed by the method of partial correlation and stepwise linear regression.The conclusions are as follows：（1） The MAInet was effected by site quality,there was a significan positive linear correlation between these two stand factors,the mean MAInet value was 8.33 m^3 · hm^-2 · a^-1 bigger in stands with site index of 22 m than that with site index of 12 m.Vgross compose of Vnet and Σ Vm,which were effected by site quality and planting density,and MAIgross increased with the site index and planting density （r =0.813 5,p =0.000 4;r =0.926 1,p =0.000 0,respectively）.（2） Because of the competition among trees and nutrition limitation after crown closed,there was a significan negative correlation between MAInet and planting density （r =-0.666 9,p =0.009 2）,the planting density was the reason slowing the tree＇ s growth.The MAInet of the plots with density of 1 m × 1 m was 3.88 years smaller than that with the density of 2 m × 3 m.However,there was no significant difference in MAInet among the stands with medium planting density.