文献类型：期刊文献

中文题名：马尾松人工林首次间伐年龄的研究

英文题名：The first thinning age of Pinus massoniana plantation

作者：张连金[1] 惠刚盈[1] 孙长忠[2]

机构：[1]中国林业科学研究院林业研究所,国家林业局林木重点培育实验室,北京100091;[2]中国林业科学研究院华北林业实验中心,北京102300

年份：2011

卷号：31

期号：6

起止页码：22-27

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家自然科学基金项目(30872021)

语种：中文

中文关键词：马尾松;冠幅;平均距离;Richards方程;首次间伐年龄

外文关键词：Pinus massoniana; crown width; average distance; Richards equation; the first thinning age

分类号：S791.1

摘要：借助11年生马尾松造林密度试验林的逐年观测资料,分析不同造林密度林分的平均冠幅与林木间平均距离的比值与年龄之间的关系,并用Richards方程进行拟合。结果表明:马尾松人工林的起始间伐年龄可通过林木树冠刚好完全重叠时间点(A1)和冠幅与林木平均距离的比值与该比值的极限值近似相等的时间点(A2)的平均值(A0)来确定;马尾松人工林4种不同造林密度(1 667(A)、3 333(B)、5 000(C)和6 667株.hm-2(D))林分的首次间伐时间分别约为9 a、7 a、5 a和5 a。并建立了马尾松的首次间伐年龄与造林密度的关系模型,其决定系数达0.98。与传统的方法相比,首次间伐时间基本一致,表明提出的确定人工林首次间伐时间的方法有效、可行。由于此方法是一种定量化方法,且计算简便,因此具有重要的理论和实际意义,可为人工林的间伐技术体系提供参考。
The relationship between the ratio of the average crown width to the average distance and the age were analyzed by using the data obtained year by year during 11-year-old Pinus massoniana from the different planting density experiment stands.And it was fitted by Richards equation.The results show that the first thinning ages of Pinus massoniana plantation were generally determined by the mean of the age when trees crown totally overlapped and the age when the ratio of the average crown width to the average distance was nearly equal to its limit parameter;the first thinning ages of Pinus massoniana plantation in 4 different kinds of planting density（1 667（A）、3 333（B）、5 000（C）and 6 667 trees·hm-2（D）） were about at the age of 9,7,5 and 5 years respectively.The models between the first thinning age and planting density of Pinus massoniana were established,and the coefficient of determination were above 0.98.Compared with traditional methods,the first thinning ages were basically consistent,which indicated that the method for determining the first thinning age was effective and feasible.Because this method is a qualitative method and its calculation is simple,it has important theoretical and practical significance and can provide the references for the thinning technology system of plantation.