CN105260788A - 一种异龄混交林最佳树种径阶密度最优经营配置的方法 - Google Patents

一种异龄混交林最佳树种径阶密度最优经营配置的方法 Download PDF

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CN105260788A
CN105260788A CN201510602383.4A CN201510602383A CN105260788A CN 105260788 A CN105260788 A CN 105260788A CN 201510602383 A CN201510602383 A CN 201510602383A CN 105260788 A CN105260788 A CN 105260788A
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冯仲科
邱梓轩
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Beijing Forestry University
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Beijing Forestry University
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Abstract

本发明公开了一种异龄混交林最佳树种径阶密度最优经营配置的方法。林分的径阶、树高和密度是林分调查的重要因子,也是森林经营的可靠数据。而他们与蓄积量的关系一直是林业工作者所关注的问题。一种异龄混交林最佳树种径阶密度最优经营配置的方法是通过大量研究,取得数学经验模型,再利用非线性数学模型,建立一元材积模型最佳径阶密度分布模型和二元材积模型最佳径阶密度分布模型,为林决策支持或规划设计提供理论上的依据。

Description

一种异龄混交林最佳树种径阶密度最优经营配置的方法
一、技术领域
本发明涉及一种造林决策支持或规划设计方法,特别是一种异龄混交林最佳树种径阶密度最优经营配置的方法。
二、技术背景
林分的径阶、树高和密度是林分调查的重要因子,也是森林经营的可靠数据。而他们与蓄积量的关系一直是林业工作者所关注的问题。一种异龄混交林最佳树种径阶密度最优经营配置的方法是通过大量研究,取得数学经验模型,再利用非线性数学模型,建立一元材积模型最佳径阶密度分布模型和二元材积模型最佳径阶密度分布模型,为林决策支持或规划设计提供理论上的依据。
三、发明内容
为了提高林决策支持或规划设计,本发明的目的就是提供一种异龄混交林最佳树种径阶密度最优经营配置方法。
本发明的目的是这样实现的:
利用定角θ控制定点立木计数抽样木观测,数学模型①k=(50θ)2,θ以弧度为单位,定角θ控制的定点计数木n≤10;某林分有i=1,2,...,m个树种,定角θ观测计数抽样木的结果为dij,Hij(dij为胸径,Hij为树高,i为树种,j=1,2,…,n为计数木抽样木序数),某计数木的林分密度Nij(棵/km2),数学模型②
某树种材积量的一元材积V1数学模型③为二元材积V2数学模型④其中,ai、bi、ci为第i树种的三个参数,因此,一元材积年度生长量ΔV1数学模型⑤为:二元材积年度生长量ΔV2数学模型⑥为其中,Δdij,ΔHij为下一年胸径和树高的生长量,依解析木模型获取;
使林分年度蓄积生长量ΔM1最大的一元径阶分布数学模型⑦为:使林分年度蓄积生长量ΔM2二元径阶分布数学模型⑧为 ΔM 2 = Σ i = 1 m Σ j = 1 n N i j ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) ; N = Σ j = 1 n N i j , 引入拉格朗日因子欲使ΔM1或ΔM2为最大,一元材积模型须使数学模型⑨二元材积模型须使数学模型⑩ N i j 0 ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) = 1 n ΔM 2 , 因此,一元材积模型最佳径阶密度分布为数学模型二元材积模型最佳径阶密度分布为数学模型 N i j 0 = 1 n ΔM 2 ( a i b i d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) - 1 .
本项发明具有以下优点:
①建立一元材积模型最佳径阶密度分布模型和二元材积模型最佳径阶密度分布模型,为林决策支持或规划设计提供理论上的依据;
②为造林决策支持或规划设计提供了一种高效的技术选择。
四、具体实施方式:
采用异龄混交林最佳树种径阶密度最优经营配置方法,在技术方法上和求算思路上都有了较大的改进,具体是:
1)利用定角θ控制定点立木计数抽样木观测,数学模型①k=(50θ)2,θ以弧度为单位,定角θ控制的定点计数木n≤10;某林分有i=1,2,...,m个树种,定角θ观测计数抽样木的结果为dij,Hij(dij为胸径,Hij为树高,i为树种,j=1,2,…,n为计数木抽样木序数),某计数木的林分密度Nij(棵/km2),数学模型②
2)某树种材积量的一元材积V1数学模型③为二元材积V2数学模型④其中,ai、bi、ci为第i树种的三个参数,因此,一元材积年度生长量ΔV1数学模型⑤为:二元材积年度生长量ΔV2数学模型⑥为其中,Δdij,ΔHij为下一年胸径和树高的生长量,依解析木模型获取;
3)使林分年度蓄积生长量ΔM1最大的一元径阶分布数学模型⑦为:使林分年度蓄积生长量ΔM2二元径阶分布数学模型⑧为 ΔM 2 = Σ i = 1 m Σ j = 1 n N i j ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j c i - 1 H i j c i - 1 ΔH i j ) ; N = Σ j = 1 n N i j , 引入拉格朗日因子欲使ΔM1或ΔM2为最大,一元材积模型须使数学模型⑨二元材积模型须使数学模型⑩ N i j 0 ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) = 1 n ΔM 2 , 因此,一元材积模型最佳径阶密度分布为数学模型二元材积模型最佳径阶密度分布为数学模型 N i j 2 = 1 n ΔM 2 ( a i b i d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) - 1 .

Claims (1)

1.一种异龄混交林最佳树种径阶密度最优经营配置的方法,其特征是:利用定角θ控制定点立木计数抽样木观测,数学模型①k=(50θ)2,θ以弧度为单位,定角θ控制的定点计数木n≤10;某林分有i=1,2,...,m个树种,定角θ观测计数抽样木的结果为dij,Hij(dij为胸径,Hij为树高,i为树种,j=1,2,...,n为计数木抽样木序数),某计数木的林分密度Nij(棵/km2),数学模型② N i j = k πd i j 2 × 4 × 10 4 ;
某树种材积量的一元材积V1数学模型③为二元材积V2数学模型④其中,ai、bi、ci为第i树种的三个参数,因此,一元材积年度生长量ΔV1数学模型⑤为:二元材积年度生长量ΔV2数学模型⑥为其中,Δdij,ΔHij为下一年胸径和树高的生长量,依解析木模型获取;
使林分年度蓄积生长量ΔM1最大的一元径阶分布数学模型⑦为:使林分年度蓄积生长量ΔM2二元径阶分布数学模型⑧为 ΔM 2 = Σ i = 1 m Σ j = 1 n N i j ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) ; N = Σ j = 1 n N i j , 引入拉格朗日因子欲使ΔM1或ΔM2为最大,一元材积模型须使数学模型⑨二元材积模型须使数学模型⑩ N i j 0 ( a i b j d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) = 1 n ΔM 2 , 因此,一元材积模型最佳径阶密度分布为数学模型 二元材积模型最佳径阶密度分布为数学模型 N i j 0 = 1 n ΔM 2 ( a i b i d i j b i - 1 H i j c i Δd i j + a i c i d i j b i H i j c i - 1 ΔH i j ) - 1 ; 根据材积、树种、径阶、密度之间的关系,可以获得异龄混交林最佳树种径阶密度最优经营配置。
CN201510602383.4A 2015-09-18 2015-09-18 一种异龄混交林最佳树种径阶密度最优经营配置的方法 Pending CN105260788A (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107464029A (zh) * 2016-06-03 2017-12-12 北京林业大学 一种中国主要树种通用二元材积模型系数
CN108344400A (zh) * 2017-01-22 2018-07-31 北京林业大学 一种水平正直摄影影像测定森林灾害状态分布的技术方法
CN112985232A (zh) * 2021-04-28 2021-06-18 唐源盛 一种林木胸径快速测量工具、系统及方法
CN113141947A (zh) * 2020-01-07 2021-07-23 北京林业大学 一种同龄人工林改造为异龄混交林的空间配置矩阵方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
段卫明 等: "永新县用材林基地立地质量评价及二元立木材积动态模型的研究", 《江西林业科技》 *
王利民 等: "塞罕坝地区华北落叶松人工林不同径阶合理经营密度的研究", 《河北林果研究》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107464029A (zh) * 2016-06-03 2017-12-12 北京林业大学 一种中国主要树种通用二元材积模型系数
CN108344400A (zh) * 2017-01-22 2018-07-31 北京林业大学 一种水平正直摄影影像测定森林灾害状态分布的技术方法
CN113141947A (zh) * 2020-01-07 2021-07-23 北京林业大学 一种同龄人工林改造为异龄混交林的空间配置矩阵方法
CN113141947B (zh) * 2020-01-07 2023-09-26 北京林业大学 一种同龄人工林改造为异龄混交林的空间配置矩阵方法
CN112985232A (zh) * 2021-04-28 2021-06-18 唐源盛 一种林木胸径快速测量工具、系统及方法

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