摘要
采用随机抽样调查方法,对卧龙自然保护区引种的日本落叶松人工林生长状况及林下乔木郁闭度和灌草盖度进行调查研究。结果表明,日本落叶松人工林林下完全寸草不生的“无灌草纯林”占11.9%,面积111 hm^2,林下有灌草但盖度小于30%的“稀灌草纯林”占37.4%,面积350 hm^2,约占日本落叶松总面积半数的“无灌草纯林”和“稀灌草纯林”对大熊猫等野生动物的正常活动构成一定威胁;调查还发现该森林“林缘效应”和“林窗效应”十分明显,即日本落叶松生长过于强势,灌草只有在林窗和林缘阳光穿透率较高的地方才容易生长。为消除不良影响,提出对日本落叶松林进行改造,不再进行大面积人工造林,不再引进外来物种,以增加林窗方式进行间伐实验,逐步淘汰日本落叶松林等建议。
The growth status,crown density and shrubs and herbs coverage of introduced Larix kaempferi plantation in Wolong National Nature Reserve were investigated by random sampling survey.The results showed that 11.9%of Larix kaempferi plantation was“pure forest without shrub and herb”,with an area of 111 hm^2,and 37.4%was“pure forest with sparse shrub and herb”but the coverage was less than 30%,with an area of 350 hm^2.The“pure forest without shrub and herb”and“pure forest with sparse shrub and herb”which accounted for about half of the total area,constituted a threat to the normal activities of wild animals such as giant panda.The survey also found that the“edge effect”and“gap effect”of the forest were very obvious.The growth of Larix kaempferi was so strong that shrubs and herbs could grow easily only in the places with high sunlight penetration rate in the gap and forest edge.In order to eliminate the adverse effects,this paper suggested to reform the Larix kaempferi plantation,stop the large-scale artificial afforestation and the introduction of alien species,carry out thinning experiment by increasing forest gaps,and phase out Larix kaempferi plantation.
作者
刘明冲
叶平
谭迎春
管晓
何廷美
唐莉
LIU Mingchong;YE Ping;TAN Yingchun;GUAN Xiao;HE Tingmei;TANG Li(Administration of Wolong National Nature Reserve,Wenchuan,Sichuan 623006,China)
出处
《林业调查规划》
2020年第5期51-54,共4页
Forest Inventory and Planning
基金
四川省重大科技专项课题:大熊猫国家公园生物多样性保育关键技术与示范项目子课题——外来入侵物种生态防控与资源化利用技术研究(项目编号18ZDZX0095).
关键词
日本落叶松
郁闭度
灌草盖度
无灌草纯林
林缘效应
卧龙国家级自然保护区
Larix kaempferi
crown density
shrub and herb coverage
pure forest without shrub and herb
forest edge effect
Wolong National Nature Reserve
