川中丘陵区人工柏木林不同结构调整模式对比研究  

Comparative Study on Different Structural Adjustment Models of Artificial Cypress Plantation in Hilly Areas of Central Sichuan

作　　者：陈俊华[1] 杨梅 刘一丁 蒋川东 李羽洁 龚固堂[1] 廖清贵[1] CHEN Junhua;YANG Mei;LIU Yiding;JIANG Chuandong;LI Yujie;GONG Gutang;LIAO Qinggui(Sichuan Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland,Sichuan Academy of Forestry,Chengdu 610081,China;Liangshan Modern Forestry Industry Development Guidance Service Center,Xichang 615000,China;College of Earth Science,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川省林业科学研究院/森林与湿地生态恢复与保育四川重点实验室,四川成都610081 [2]凉山州现代林业产业发展指导服务中心,四川西昌615000 [3]成都理工大学地球科学学院,四川成都610059

出　　处：《四川林业科技》2022年第6期11-17,共7页Journal of Sichuan Forestry Science and Technology

基　　金：四川省基本科研经费项目“川中丘陵区人工柏木林碳计量研究”(2022JBKY08);世行贷款长江上游森林生态系统恢复项目科技成果推广或科研课题研究项目(510201202038776/2)。

摘　　要：以川中丘陵区人工柏木林两种结构调整改造模式—“带状采伐+补阔”改造林分(采伐带与保留带均为8m,补植阔叶树为桤木、香椿、香樟、喜树)、“生态疏伐”改造林分(按蓄积疏伐强度为25%~30%)和对照林分以及天然次生栎柏混交林作为研究对象,分析生物多样性、乔木生长、灌草盖度和林下更新幼苗数量,结果表明:(1)乔木层丰富度和Shannon-Wiener多样性指数最高的是栎柏混交林,其次是“带状改造+补阔”改造林分。灌、草丰富度均以栎柏混交林最高,其次是“生态疏伐”改造林分;灌木多样性指数最高的是“生态疏伐”改造林分,其次是栎柏混交林;草本Shannon-Wiener多样性指数最高的是栎柏混交林,其次是“生态疏伐”改造林分。对照林分乔灌草层物种丰富度、多样性指数均最低。(2)乔木平均胸径、平均树高按大小排列分别为:“生态疏伐”改造林分>“带状采伐+补阔”改造林分>栎柏混交林>对照,栎柏混交林>“带状采伐+补阔”改造林分>“生态疏伐”改造林分>对照。(3)灌草盖度第一、第二均是带状采伐+补阔”改造林分和栎柏混交林,对照最小。(4)林下更新幼苗以栎柏混交林最多,最少的是对照,“带状采伐+补阔”改造林分和“生态疏伐”改造林分差异不大。(5)对川中丘陵区的人工柏木林应根据不同经营目标科学编制森林经营方案,开展多功能经营,以更好地发挥其多种效益。Two structural adjustment and transformation models of artificial cypress plantation in hilly areas of central Sichuan,that is,the“strip cutting+replanting”model(with the cutting-strip zone and reserved zone were 8m,and the replanted broad-leaved trees were Alnus cremastogyne、Toona sinensis、Cinnamomum camphora、Camptotheca acuminata),the“ecological thinning”model(the thinning intensity was 25%~30%in standing volume),the control stand(no cutting treatment)and the natural secondary oak-cypress mixed forest were taken as the research objects,the biodiversity,tree growth,coverage of shrubs and herbs,and the number of regenerated seedlings were analyzed.The results showed that:(1)The oak-cypress mixed forest had the highest tree layer richness and Shannon-Wiener diversity index,followed by the“strip cutting+replanting”model.The richness of shrubs and herbs were the highest in oak-cypress mixed forest,followed by the“ecological thinning”model.The shrub diversity index was the highest in the“ecological thinning”model,followed by the oak-cypress mixed forest.The Shannon-Wiener diversity index of the herbaceous species was the highest in oak-cypress mixed forest,followed by the“ecological thinning”model.However,the species richness and diversity index of the tree,shrub and herb layer of the control stand were the lowest.(2)The average DBH of trees was in the order of the“ecological thinning”model>the“strip cutting+replanting”model>oak-cypress mixed forest>control,and the average tree height was ranked as:the oak-cypress mixed forest>the“strip cutting+replanting”model>the“ecological thinning”model>control.(3)The first and the second highest coverage of shrubs and herbs were the“strip cutting+replanting”model and the oak-cypress mixed forest,and the lowest was the control.(4)In terms of regenerated seedlings under the forest,the largest number was in the oak-cypress mixed forest,and the least was in the control.But,there was little difference between the“strip cutting+repla

关 键 词：人工柏木林 多功能经营 结构调整 川中丘陵区 

分 类 号：S718.5[农业科学—林学]