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林业资源管理 ›› 2022, Vol. 0 ›› Issue (4): 80-88.doi: 10.13466/j.cnki.lyzygl.2022.04.011

• 科学研究 • 上一篇    下一篇

抚育间伐对川西高海拔地区柳杉人工林生态效益的影响

胡佳怡1,2(), 王瑞辉1,2(), 刘凯利1,2, 张斌1,2, 周钰淮1,2, 李雪惠1,2, 龚映匀1,2   

  1. 1.中南林业科技大学 林学院,长沙 410004
    2.中南林业科技大学 中亚热带林学国家长期科研基地,长沙 410004
  • 收稿日期:2022-05-05 修回日期:2022-05-24 出版日期:2022-08-28 发布日期:2022-10-13
  • 通讯作者: 王瑞辉
  • 作者简介:胡佳怡(1998-),女,湖南耒阳人,在读硕士,主要从事森林培育方面的研究工作。Email: 453797384@qq.com
  • 基金资助:
    国家林业局森林抚育成效监测国家级样地及监测体系建设项目(2018-28-11);湖南省研究生科研创新项目(CX20200706);中南林业科技大学研究生科研创新项目(CX202202062)

Effects of Thinning on Ecological Benefits of Cryptomeria fortunei Plantations in High Altitude Area of Western Sichuan

HU Jiayi1,2(), WANG Ruihui1,2(), LIU Kaili1,2, ZHANG Bin1,2, ZHOU Yuhuai1,2, LI Xuehui1,2, GONG Yingyun1,2   

  1. 1. College of Forestry,Central South University of Forestry and Technology,Changsha 410004,China
    2. National Long-term Scientific Research Base for Forestry in Mid-subtropics China,Central South University of Forestry and Technology,Changsha 410004,China
  • Received:2022-05-05 Revised:2022-05-24 Online:2022-08-28 Published:2022-10-13
  • Contact: WANG Ruihui

摘要:

以川西高海拔地区9a生柳杉人工林为研究对象,按株数间伐强度设置对照样地(0%,CK)、轻度间伐(20%,T1)、中度间伐(35%,T2)和重度间伐(50%,T3)4个梯度处理,观测林分特征因子、林下植被多样性、土壤理化性质、地表径流因子相关指标,分析不同间伐强度对柳杉人工林生态效益的影响。在此基础上,运用层次分析法和熵权法进行权重赋值,得到各指标对生态效益的重要值,与观测数据结合计算各指标的评价得分,综合计算获得各处理的生态效益评价得分。结果表明:生态效益的重要值排序为林分特征因子(0.384 4)>土壤理化性质(0.254 6)>林下植被多样性(0.242 8)>地表径流因子(0.118 2);生态效益综合评价得分为T3(71.6分)>T2(70.4分)>T1(58.9分)>CK(28.8分)。研究表明,9a生柳杉人工林采取50%的重度间伐或35%的中度间伐能够取得较好的生态效益,考虑到川西高海拔地区环境的特殊性,推荐中度间伐为该地区柳杉人工林适宜的间伐强度。

关键词: 柳杉, 抚育间伐, 生态效益, 层次分析法, 林分生长

Abstract:

The thinning experiment was carried out in 9-year-old C.fortunei plantation in high altitude area of Western Sichuan,according to the tree number,four thinning intensities were set up:control group (0%,CK),mild thinning (20%,T1),moderate thinning (35%,T2)and severe thinning (50%,T3),and the differences in stand characteristic factors,soil physicochemical properties,understory species diversity and surface runoff were observed and analyzed among these thinning treatments.On this foundation,analytic hierarchy process and entropy weight method were used to assign weight to get the important value of each index of ecological benefit,and the evaluation score of each index was calculated by combining with the observed data.Ecological benefit evaluation score of each treatment was obtained by comprehensive calculation.The results showed that:from the important value of ecological benefits,the order was stand characteristic factor (0.384 4),soil physicochemical properties (0.254 6),understory vegetation diversity (0.242 8)and surface runoff index (0.118 2).The comprehensive evaluation of ecological benefits found that T3 (71.6)performed the best and then followed by T2 (70.4),T1 (58.9)and CK (28.8).In conclusion,thinning intensities of 50% or 35% could achieve good ecological benefits for 9-year-old C.fortunei plantation,and considering the particularity environment in high altitude areas of western Sichuan,the thinning intensity of 30% was suitable for management of C.fortunea plantations.

Key words: Cryptomeria fortunei, tending thinning, ecological benefit, analytic hierarchy process, stand growth

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