毛竹皆伐后针阔混交次生林群落短期动态  

Short-term Dynamics of a Coniferous and Broad-leaved Mixed Secondary Forest Community after Clear-cutting of Phyllostachys edulis

作　　者：张永昌 王秀云[2] 樊民亮 杨华[2] Zhang Yongchang;Wang Xiuyun;Fan Minliang;Yang Hua(Pan’an County Huangtan Forest Farm,Jinhua·Zhejiang 321004,P.R.China;Zhejiang Academy of Forestry)

机构地区：[1]磐安县黄檀林场,浙江金华321004 [2]浙江省林业科学研究院

出　　处：《东北林业大学学报》2024年第7期19-24,共6页Journal of Northeast Forestry University

基　　金：浙江省林业科技项目(2017SY09、2022B07)。

摘　　要：为进一步了解毛竹皆伐后,人工促进天然更新形成的针阔混交次生林群落的恢复动态,以浙江省磐安县黄檀林场为研究区,设置140 m×60 m(0.84 hm^(2))固定样地,于2022年4月和2023年10月进行2次调查,分析群落物种组成、径级结构及种群更新等方面的动态变化。结果表明:(1)2022—2023年,群落组成变化不大,仅玉兰退出群落;重要值前7位的物种均相同,且均以杉木占据绝对优势。(2)样地内木本植物个体数由836株减少到812株,其中死亡58株,新增34株(胸径≥3 cm)。(3)群落植株个体平均胸径由14.16 cm增加到14.87 cm,增加了5.0%。两期群落植株个体数径级均呈倒“J”型分布,随径级的增加个体数减少。(4)2022—2023年,样地内胸径≥3 cm的个体年均死亡率和新增率分别为4.79%和2.85%,种群年实际更新率为-1.94%,但主要物种的死亡率、新增率和种群更新差异较大。总体上群落物种组成和结构总体稳定,人工干预后恢复效果良好。To further understand the recovery dynamics of the mixed coniferous and broad-leaved secondary forest community formed through artificial promotion of natural regeneration after clear-cutting of Phyllostachys edulis,a study was conducted in the Huangtan Forest Farm,Pan’an County,Zhejiang Province.A fixed plot of 140 m×60 m(0.84 hm^(2))was established,and two surveys were conducted in April 2022 and October 2023 to analyze the dynamic changes in species composition,diameter class structure,and population regeneration of the community.The results showed that:(1)From 2022 to 2023,the community composition changed slightly,with Magnolia denudata exiting the community.The top 7 species in importance value were all the same,with Cunninghamia lanceolata holding an absolute advantage.(2)The number of woody plants in the plot decreased from 836 to 812 individuals,with 58 deaths and 34 new individuals(diameter at breast height≥3 cm).(3)The average diameter at breast height of the community plants increased from 14.16 cm to 14.87 cm,an increase of 5.0%.The diameter class distribution of the community plants showed an inverted“J”shape in both periods,with the number of individuals decreasing as the diameter class increased.(4)From 2022 to 2023,the annual average mortality and new increment rates of individuals with a diameter at breast height≥3 cm in the plot were 4.79%and 2.85%,respectively,with an actual population renewal rate of-1.94%per year.However,there were significant differences in mortality,new increment rates,and population renewal among the main species.Overall,the community’s species composition and structure remained stable,and the recovery effect after artificial intervention was good.

关 键 词：针阔混交林 死亡率 新增率 群落动态 毛竹 

分 类 号：S948.1[农业科学—水产养殖]