摘要
林窗是森林结构调整的重要方式,也是森林群落演替过程的重要环节,对生态系统发展有着举足轻重的推动作用。为研究柏木低效林林窗自然更新状态与人工更新状态生物多样性,2021年3月砍伐形成50、100、150、200 m24种面积的林窗,并设置CK对照组。2021年7月、2022年7月2次采用样方调查法以林下植物为研究对象对不同大小林窗进行生物多样性调查和分析,在自然更新状态林窗中共记录植物11892株,49种,分属46属27科,在人工更新状态林窗中共记录植物15325株,56种,分属52属31科。分析结果表明,以人工更新状态下和自然更新状态林下植物多样性的物种丰富度Shannon-wiener指数、Pielou均匀度指数以及Simpson优势度为指标进行评价,柏木林窗林下植物的多样性在人工更新状态下优于自然更新状态下的林窗。因此,合理地进行间伐、树种引入、上层透光抚育等结构调控改善林分结构,有助于提高林分生物多样性,是柏木低效林经营的方向。
Forest gap is an important way of forest structure adjustment and an important link in forest community succession process,which plays an important role in promoting ecosystem development.In order to study biodiversity in natural and artificial regeneration states of low-efficiency cypress forest gaps,forest gaps of 50、100、150、200 m 2 were felled in March 2021,and control CK was set.In July 2021 and July 2022,the quadrat survey method was used to investigate and analyze the biodiversity of different large and small forest gaps with understory plants as the research objects.A total of 11892 plants and 49 species belonging to 46 genera and 27 families were recorded in the natural regeneration state gaps,and 15325 plants and 56 species belonging to 52 genera and 31 families were recorded in the artificial regeneration state forest gaps.The analysis results showed that the species richness Shannon-wiener index,Pielou evenness index and Simpson dominance index of plant diversity under artificial and natural regeneration states were evaluated,and the plant diversity under artificial regeneration state was better than that under natural regeneration state.Therefore,it is the direction of low efficiency cypress forest management to improve the stand structure by reasonable structural control such as thinning,tree species introduction and upper layer transparent tending.
作者
潘业田
陈玥
吴茜
刘朔
张翠翠
Pan Yetian;Chen Yue;Wu Qian;Liu Shuo;Zhang Cuicui(Sichuan Provincial Institute of Forestry and Grassland Inventory and Planning,Chengdu 610081,Sichuan,China;Plant Protection Research Institute of Sichuan Academy of Agricultural Sciences,Chengdu 610066,Sichuan,China)
出处
《绿色科技》
2024年第11期69-75,共7页
Journal of Green Science and Technology
基金
四川省林业和草原调查规划院自立课题项目(编号:LGKT202303)。
关键词
川中丘陵区
林窗
柏木低效林
植物多样性
forestry gap
low-efficiency cypress forest
plant biodiversity
hilly area of central Sichuan
作者简介
潘业田(1987-),男,硕士,高级工程师,研究方向为森林培育。;通讯作者:张翠翠(1991-),女,硕士,研究员,研究方向为植物保护。
