基于Richards方程的落叶松人工林断面积生长模型
2015-10-21王霓虹杨英奎戴巍
王霓虹 杨英奎 戴巍
摘要:在众多测树因子中,林分断面积最为重要。本文主要论述了模型以及根据模型推导孟家岗实验林场落叶松人工林断面积生长模型的过程。此次研究的主要对象是落叶松人工林,地点选在黑龙江省佳木斯市孟家岗实验林场,获取了其中28块落叶松人工林标准地林分数据。根据标准地林木情况,运用SPSS 19.0统计软件和Matlab数学软件对落叶松断面积生长模型进行模拟推导,结果显示:在95%置信区间内,模型的相关指数达到了0.991,与之前的模型相比相关系数更高,并且所得各参数的估计值符合孟家岗落叶松的生长规律。新模型的应用使得落叶松人工林断面积的模拟精度大幅增加,为孟家岗森林资源的合理利用提供了一定数据支持,同时提高了落叶松的经济效益。
关键词:落叶松;断面积;Richards生长方程
中图分类号:S 758文献标识码:A文章编号:1001-005X(2015)01-0022-04
The Basal Area Growth Model of Larch Plantation
Based on Richards Equation
Wang Nihong,Yang Yingkui,Dai Wei
(College of Information and Computer Engineering,Northeast Forestry University,Harbin 150040)
Abstract:Stand basal area is the core factor among many tree measurement factors.This paper described the process of establishing the basal area growth model of larch plantation using Richards growth equation.It was based on the experimental forest of larch plantations in Mengjiagang,Jiamusi city,Heilongjiang Province.The survey data in 28 standard larch forest plots were obtained.According to stand trial status quo,SPSS 19 statistical software and Matlab software were used to simulate the larch basal area growth model.The results showed that at 95% confidence interval,the correlation index of the model reached 0.991,which is higher than that of previous model.The estimation of the parameters is in line with the growth laws of larch plantation in Mengjiagang.The new model has greatly improved the simulation accuracy of the larch plantation,which can provide basic data for the optimal allocation of forest resources and help improve the economic efficiency of larch plantation.
Keywords: larch;basal area;Richards growth equation
收稿日期:2014-08-16
基金項目:林业科学技术推广项目([2012]43 号);“十二五”农村领域国家科技计划课题(2012AA102003-2);国家公益性行业专项(201104037)。
第一作者简介:王霓虹,教授。研究方向:林业工程。Email:wnh@mail.nefu.edu.cn
引文格式:王霓虹,杨英奎,戴巍.基于Richards方程的落叶松人工林断面积生长模型[J].森林工程,2015,31(1):22-25.落叶松主要分布于我国东北部,是一种耐寒、喜光、耐干旱瘠薄的浅根性树种,很容易适应各种土壤,并且具有耐水湿能力。木材微重,硬度适中,靠边是淡黄色,偏中间是黄褐色至红褐色,能够提炼树脂,耐用。林分生长模型在森林可持续经营中有着重要的作用,为森林经营人员提供可靠的理论依据,即可以帮助工作人员确定森林间伐期、森林成熟和主伐年龄等,从而增强森林集约经营管理能力[1]。……
