中南林业科技大学学报2025，Vol.45Issue(12)：47-55,9.DOI:10.14067/j.cnki.1673-923x.2025.12.005
间伐强度对油松飞播林林分空间结构及灌草多样性的影响
Effects of thinning intensity on stand spatial structure and shrub and grass diversity in Pinus tabulaeformis fly-seeded forest
摘要
Abstract
[Objective]Gain an in-depth understanding of the patterns of how Pinus tabuliformis aerial seeding forest stand structures are affected by different thinning intensities,and improve the stand quality of Pinus tabuliformis aerial seeding forests in the Funiu mountains.[Method]A total of 12 plots were set up with 3 different thinning intensities:light thinning(15%),moderate thinning(30%),heavy thinning(45%),and control(unthinned)standard plots.Based on the measured data of the sample plots,the differences in stand spatial structure and shrub plant diversity among different types were analyzed.Pearson correlation analysis was employed to examine the effects of the stand spatial structure index on the diversity of shrub and herb.[Result]The results indicated that there was little difference between the families,genera and species of shrubs under the three different thinning intensities,and they were significantly higher than those in the untended state.The herbs had the most families,genera and species in the state of heavy tending(45%nurturing intensity),the least families,genera and species in the state of light tending(15%),and the fewer families,genera and species in the light tending and moderate tending states than in the non-tending state;the Shannon-Weiner index,Simpson index,and Pielou index were as follows:medium thinning＞light thinning＞heavy thinning＞no thinning,with no significant difference.The herbaceous layer presented heavy thinning＞unthinning＞moderate thinning＞light thinning.The Shannon-Weiner index and Simpson index demonstrated no significant difference between light thinning and moderate thinning,but a significant difference between heavy thinning and the Shannon-Weiner index.There was no significant difference in the neighborhood comparison and uniform angle index among the four stands,and all of them constituted stands featuring unobvious differentiation and micro-clumpy distribution.The mingling of Pinus tabulaeformis was negatively correlated with Shannon-Weiner index,Simpson index and Pielou index in shrub layer(P＜0.05),and positively correlated with Shannon-Weiner index and Simpson index in herbaceous layer(P＜0.05).The crowding of Pinus tabulaeformis forest was negatively correlated with Simpson index and species number of herbaceous layer P＜0.05),and was significantly negatively correlated with Shannon-Weiner index(P＜0.01).[Conclusion]Adopting 45%thinning intensity can improve the diversity of shrub and grass in the fly-seeding forest.关键词
油松飞播林/林分空间结构/间伐/灌草多样性Key words
Pinus tabuliformis fly-seeding forest/spatial structure of stand/tending thinning/understory shrub diversity分类
农业科技引用本文复制引用
徐小涵,王新杰,王红敏,张延华..间伐强度对油松飞播林林分空间结构及灌草多样性的影响[J].中南林业科技大学学报,2025,45(12):47-55,9.基金项目
北京市科技计划项目(Z221100005222035). （Z221100005222035）
