生态学杂志2017，Vol.36Issue(4)：1134-1141,8.DOI:10.13292/j.1000-4890.201704.035
杉木生态林林分间伐空间结构优化模型
Spatial structure optimizing model of stand thinning of Cunninghamia lanceolata ecological forest
摘要
Abstract
The methods of multiplication and division were adopted to carry out the multi-objective programming and to determine the objective function so as to optimize stand spatial structure for the total mingling,forest layer index,W V Hegyi competition index,uniform angle index,and open degree,taking spatial structure and non-spatial structure as constraints.The model of stand thinning spatial structure optimizing model of Cunninghamia lanceolata ecological forest was built based on the determination of stand spatial structure constraint conditions priority by using grey relation method.This model was then used to determine the optimal solution of stand thinning spatial structure optimization of C.lanceolata ecological forest.The results showed that the stand spatial structure optimization objective function values of C.lanceolata ecological forest followed the order of total mingling (0.7016) ＞ forest layer index (0.7008) ＞ uniform angle index (0.6578) ＞ open degree (0.5960) ＞ W V Hegyi competition index (0.5785).Therefore,when considering stand spatial structure constraint condition before stand thinning,we must consider mingling firstly,followed by the forest layer index.The model was used in plots (20 m×30 m),where 14 optimally cutting trees were chosen with a thinning intensity of 14.1％.After thinning,the numbers of diameter class and tree species that describe non-spatial structure remained unchanged;stand mingling was increased by 2.71％,and species spatial isolation level was enhanced;forest layer index was increased by 10.91％,stand vertical hierarchical structure was improved greatly;W V Hegyi competition index was reduced by 8.64％,which showed a decline in stand competition pressure;uniform angle index was reduced by 8.25％,which showed a tendency of random distribution in stand spatial structure;open degree increased by 11.98％,which showed an improvement of light transmission.The objective function Q (g) value of stand spatial structure optimization model was increased by 12.18％.关键词
杉木/生态林/空间结构/间伐/空间结构优化模型Key words
Cunninghamia lanceolata/ecological forest/spatial structure/thinning/spatial structure optimizing model引用本文复制引用
曹小玉,李际平,胡园杰,杨静..杉木生态林林分间伐空间结构优化模型[J].生态学杂志,2017,36(4):1134-1141,8.基金项目
中南林业科技大学林学重点学科开放基金项目(2016ZD06)、“十二五”国家科技支撑计划项目(2012BAD22B0505)、湖南省教育厅项目(16C1668)、湖南省大学生研究性和创新性实验计划项目(湘教通[2016]283号)、中南林业科技大学青年基金重点项目(QJ2012013A)和中南林业科技大学人才引进项目(2016YJ075)资助. （2016ZD06）
