赣江源低效针叶林林分生长状况  

Stand growth status of low effect coniferous forest in Ganjiangyuan,Jiangxi Province

作　　者：王丽艳[1] 刘光正[1] 周晨 金洪平 余正良 Wang Liyan;Liu Guangzheng;Zhou Chen;Jin Hongping;Yu Zhengliang(Jiangxi Academy of Forestry,Nanchang Jiangxi 330013,China;Ganjiangyuan Nature Reserve Administration,Shicheng Jiangxi 342700,China)

机构地区：[1]江西省林业科学院,江西南昌330013 [2]赣江源自然保护区管理局,江西石城342700

出　　处：《南方林业科学》2019年第1期5-10,共6页South China Forestry Science

基　　金：国家科技支撑计划项目"长江中下游低山丘陵防护林空间结构优化与质量调控技术研究与示范"(项目编号:2015BAD07B40);江西省林业科学院重点研发计划项目"赣江源针叶林生态化改造关键技术及效益评价研究"(项目编号:2016510801)

摘　　要：本研究采用样地法和标准木树干解析木法对赣江源低效湿地松和马尾松林进行林分生长状况分析,结果表明:研究区湿地松标准木胸径14.6 cm,树高14.7 m,树龄23 a。胸径连年生长量在10年后就急剧下降,表明胸径的生长受到了抑制。马尾松林在生长的前12年中,平均生长速度逐年加快,表明在该立地条件下马尾松林木在17年生时已达到数量成熟龄,但马尾松的单株去皮材积仅为0.016 m3。马尾松林呈小老头树,该林分急需进行改造以提高林分质量和生态防护效应。In this study,using the reference land Unit method and standard wood trunk analysis method to study the stand growth status of low effect Pinus elliottii and P.massoniana forests in Ganjiangyuan,the results showed that,in study area,standard trees'DBH of P.elliottii is 14.6 cm,tree height is 14.7 cm,tree age is 23 a.The annual growth of DBH decreased sharply after 10 years,indicating that the growth of DBH was inhibited.In the first 12 years of growth,the average growth rate of P.massoniana increased year by year,which indicated that P.massoniana had reached mature ages in 17 years,but the single bark volume of P.massoniana was only 0.016 m3.P.massoniana stands are small and old trees,which need to be reformed urgently to improve stand quality and ecological protection effect.

关 键 词：低效针叶林 生长曲线 年轮 材积 

分 类 号：S718.5[农业科学—林学]