文献类型：期刊文献

中文题名：天然混交林最优林分状态的π值法则

英文题名：A New Rule of π Value of Natural Mixed Forest Optimal Stand State

作者：惠刚盈[1] 张弓乔[1] 赵中华[1] 胡艳波[1] 刘文桢[2] 张宋智[2] 白超[1]

第一作者：惠刚盈

机构：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室;[2]甘肃省小陇山林业实验局林业科学研究所甘肃省栎类次生林生态系统重点实验室

年份：2016

卷号：52

期号：5

起止页码：1-8

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20162602532906);Scopus(收录号：2-s2.0-85046233068);北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金："十二五"国家科技支撑课题"西北华北森林可持续经营技术研究与示范"(2012BAD22B03)

语种：中文

中文关键词：天然混交林;林分状态;π值法则;单位圆

外文关键词：natural mixed forest; stand state; rule of π value; unit circle

分类号：S757

摘要：【目的】提出一个全新的林分状态合理性评价方法,为森林经营决策奠定科学基础。【方法】依据多指标综合评价原则,提出基于单位圆的林分状态评价方法,并利用该方法对我国天然锐齿栎混交林和红松阔叶林进行林分状态分析。【结果】现实林分状态优良程度取决于林分状态指标所构成的闭合图形面积大小,该面积与最优林分状态值(期望值)之比即是对现实林分状态最为恰当的度量。而最优林分状态值(期望值)恒等于单位圆面积π,此即为最优林分状态的π值法则。与常用的多指标体系比较分析的专业图表雷达图的本质区别在于,本文所提出的单位圆方法能够直接给出最优林分状态期望值。研究给出现实林分状态的计算公式并划定5个等级区间,指出林分状态可从林分空间结构(林分垂直结构和林分水平结构)、林分年龄结构、林分组成(树种多样性和树种组成)、林分密度、林分长势、顶级树种(组)或目的树种竞争、林分更新、林木健康8方面加以描述,这8方面能够表征林分主要的自然属性,且对应的每个指标值都是可操作的并能够及时收集到准确的数据。为凸显指标的先进性和实用性,文中提到的多数指标均采用最新研究成果并给出可选的测度方法。林分状态指标的归一化处理是林分状态评价的关键,应用本文提出的方法对我国天然红松阔叶林和锐齿栎混交林的林分状态进行分析发现,评价结果直观可靠,符合现实林分的客观实际。【结论】本文提出的基于单位圆的林分状态评价方法,特别是其中最优林分状态的π值法则,可为森林经营决策奠定科学基础,也可为不同地区不同类型森林健康质量评价提供分析工具。
【Objective】The reasonableness of the stand state concerns the necessity and urgency of forest management,and the quality of evaluation of stand state directly affects the quality of management decision. Only by knowing the exact optimal stand state will it be possible to make an assessment of the reasonableness of the real forest stand,after which it is viable to manage forest with targeted operating adjustment.【Method】The forest is a complex ecosystem,the multi-index evaluation method is usually used to assess it. Following the principles of multi-indicators comprehensive evaluation,a new stand state reasonableness evaluation method based on unit circle has been presented in this paper. 【Result 】The research shows that the stand state depends on the size of closed chart area composed of real stand state indicators. This chart area as a proportion of the best stand state value（ expected value） is the most appropriate measurement of real stand quality. Meanwhile,the best stand state value（ expected value） always equals to the unit circle area π,namely the rule ofπ value of the best stand state. The method of unit circle has an essential difference from the usual multi-index system of radar chart in that the expectation of optimal stand state can be directly derived by the new method. The formula given by the research is able to calculate the real stand state which can be divided into five grades. The stand state can be described by stand spatial structure（ stand vertical and horizontal structure）,stand age structure,stand composition（ tree species diversity and species composition）,stand density,stand growth,climax tree species group or main tree species competition,stand regeneration,tree health and etc. This 8 aspects can characterize the major natural attributes of stand,and the corresponding value to each indicator can be assessed easily. To highlight the advancement and practicality of theindicators,most indicators mentioned in this paper use the latest research results and optional measure methods are given.Normalization processing of stand state indicators is crucial to the stand state evaluation. Applying this method to the stand state of natural Korean pine（ Pinus koraiensis） broad-leaved forest and sharp tooth oak（ Quercus aliena var. acuteserrata）mixed forest in China has shown visual and reliable evaluation results in accordance with real stand situation.【Conclusion】The stand state evaluation method based on the unit circle,especially the rule of π value of the optimal stand state,that has been put forward in this paper,lays a scientific foundation for forest management decision and provides an analysis method to evaluate the quality of different types of forest health in different areas.