湖南湘西地区马尾松林枯落物动态估算模型研究  

Research on the litterfall estimation model of Pinus massoniana plantaticns in southern Hunan Province

作　　者：杨珍妹 吴磊 YANG Zhenmei;WU Lei(Forestry Bureau of Jishou City,Jishou 416000,Hunan,China;Natural Resources Institute of Majing’ao Town of Jishou City,Jishou 416013,Hunan,China)

机构地区：[1]吉首市林业局,湖南吉首416000 [2]吉首市马劲坳镇自然资源所,湖南吉首416013

出　　处：《湖南林业科技》2022年第6期42-47,共6页Hunan Forestry Science & Technology

摘　　要：以湖南省湘西地区马尾松人工林为研究对象,对其2014—2017年森林生物量、森林枯落物凋落量与现存量等进行调查,并对森林枯落物凋落量与森林生物量二者之间的关系进行了研究。结果表明:森林枯落物凋落量与森林乔木地上原有生物量及增加量之间存在着显著相关关系,通过森林乔木地上原有生物量W_(U 0)及增加量W_(U△)、林分密度N等林分因子来估算森林枯落物凋落量K_(W)具有很好的效果,其线性回归模型为K_(W)=0.003N+0.026W_(U 0)+0.159 W_(U△)+0.101,相关系数R=0.923。同时,可根据森林枯落物凋落量和现存量计算森林枯落物的分解速率,进而建立森林枯落物的动态变化预测模型及消长系数模型,对森林枯落物的动态变化过程及消长规律进行分析与预测。通过林分因子来估算森林枯落物凋落量和现存量,对于及时掌握森林枯落物的状态,进而对与之相关的物质循环、能量流动和生态服务功能进行分析与评价具有重要意义。In the present work,the Pinus massoniana plantations in southern Hunan Province of China were selected as the research object to investigate the the amount of forest biomass,forest litterfall and litterfall storage in 2014—2017,and thus further to research on the relationship between the amount of forest litterfall and forest biomass.The results showed that the amount of forest litterfall was significantly related to the existed and increased amount of forest biomass above ground.The estimation on the amount of forest litter fall(K_(w))through the existed amount(W_(U 0))and increased amount(W_(U△))of forest biomass above ground and stand density(N)to estimate the was well,as the linear regression model was K_(w)=0.003N+0.026W_(U 0)+0.159 W_(U△)+0.101 with the correlation coefficient R of 0.923.The decomposition rate of litterfall can calculate according to the forest litterfall and forest litterfall storage.After then the forest litter fall dynamic change prediction model and fluctuation coefficient model could establish to analysis and predict dynamic change process and rule of forest litterfall.Therefore,a new effective method that through the stand attribute factor to estimate the amount of forest litterfall and forest litterfall storage was established.It has important significance to master the sitution of forest litterfall,analysis and evaluation the material cycle,energy flow and ecological service function that related to forest litterfall timely.

关 键 词：森林枯落物 森林生物量 枯落物凋落量 枯落物现存量 枯落物动态变化 马尾松林 湘西地区 

分 类 号：S714[农业科学—林学]