浙江畲乡草鱼塘国家森林公园日本花柏群落的生产力影响因素分析  

Analysis of Productivity Influencing Factors in Chamaecyparis pisifera Communities in Caoyutang National Forest Park of Shexiang,Zhejiang Province

作　　者：周林明 吴初平[2] 周建青 焦洁洁[2] 江波[2] 汤晔 朱志柳 姚良锦 ZHOU Linming;WU Chuping;ZHOU Jianqing;JIAO Jiejie;JIANG Bo;TANG Ye;ZHU Zhiliu;YAO Liangjin(Jingning She Autonomous County Ecological Forestry Development Center,Jingning,Zhejiang 323500;Zhejiang Academy of Forestry Sciences,National Observation and Research Station of Hangzhou Urban Forest Ecosystem,Hangzhou,310023,Zhejiang)

机构地区：[1]景宁畲族自治县生态林业发展中心,浙江景宁323500 [2]浙江省林业科学研究院,浙江杭州310023

出　　处：《浙江林业科技》2025年第2期1-7,共7页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省自然科学基金资助项目(LQ23C030001);景宁畲族自治县科技计划项目(2023A40)。

摘　　要：探究不同密度日本花柏Chamaecyparis pisifera群落的群落结构、净生产力等生态特征,以及其对土壤养分等影响因素的响应,有利于揭示森林生态系统的生态过程和功能机制。本研究基于2013年与2023年浙江畲乡草鱼塘国家森林公园内不同密度日本花柏的两期生长数据和土壤化学性质数据,分析对比其生物量与净生产力,采用全子集回归法开展模型检验,探究净生产力的关键影响因素。结果表明:(1)低密度日本花柏林分(750株·hm^(2))2013—2023年胸径增长约6.1 cm,树高增长约4.0 m;高密度日本花柏林分(1850株·hm^(2))2013—2023年胸径增长约5.8 cm,树高增长约8.6 m。胸径在不同密度间增长几乎相似,树高在高密度的日本花柏林分中增长较快;(2)低密度日本花柏林分2013年地上生物量均值为462.8±28.7 kg,2023年地上生物量均值为721.1±26.4 kg。高密度日本花柏林分2013年地上生物量均值为99.1±12.3 kg,2023年地上生物量均值为279.3±21.6 kg。低密度日本花柏的净生产力比高密度日本花柏的净生产力更大。(3)土壤有机质、有效钾和有效磷等显著影响高密度日本花柏群落的生长和生产力的提高,土壤pH值、全磷和全钾含量有利于低密度日本花柏群落的生长和生产力的提高。对日本花柏群落的生长规律和影响因素的研究,可以为林业管理提供科学依据,为植被恢复与保护提供指导,促进森林资源的可持续利用和林业的可持续发展。Studying the ecological characteristics such as community structure,net productivity,and the response to soil nutrients of different density Chamaecyparis pisifera communities is beneficial for elucidating the ecological processes and functional mechanisms of forest ecosystems.Based on growth data and soil chemical properties from C.pisifera plots of varying densities in Caoyutang National Forest Park of Shexiang,Zhejiang Province,collected in 2013 and 2023,this study compared biomass and net productivity,conducted model tests using the subset regression method,and explored the key factors influencing net productivity.The results indicate that:(1)The mean diameter at breast height(DBH)of low-density C.pisifera stands(750 trees/ha)increased by approximately 6.1 cm from 2013 to 2023,while the mean tree height increased by about 4.0 m.For high-density C.pisifera stands(1850 trees/ha),the mean DBH increased by approximately 5.8 cm,and the mean tree height increased by about 8.6 m during the same period.The DBH growth was similar between different densities,while tree height increased faster in high-density C.pisifera stands.(2)The mean aboveground biomass of low-density C.pisifera stands was 462.8±28.7 kg in 2013 and 721.1±26.4 kg in 2023.For high-density stands,it was 99.1±12.3 kg in 2013 and 279.3±21.6 kg in 2023.The net productivity of low-density C.pisifera stands was greater compared to high-density stands.(3)Soil organic matter,available potassium,and available phosphorus significantly influenced the growth and productivity improvement of high-density C.pisifera communities,while soil pH,total phosphorus,and total potassium content favored the growth and productivity improvement of lowdensity C.pisifera communities.Through studying the growth patterns and influencing factors of C.pisifera communities,scientific basis can be provided for forestry management,guiding rational vegetation restoration,protection,and sustainable utilization of forest resources,thereby promoting the sustainable development of fores

关 键 词：密度效应 资源利用效率 植被结构 生物量积累 

分 类 号：S794.4[农业科学—林木遗传育种]