以树种组成和龄期为哑变量的油松林分水平间伐出材模型研究  

Study on the Horizontal Thinning Volume Model of Pinus Tabulaeformis Stand with Tree Species Composition and Age as Dummy Variables

作　　者：段亚敏 Duan Yamin(Henghe Forestry Farm,National Forest Administration Bureau of Zhongtiao Mountain in Shanxi Province,Yangcheng 048100,China)

机构地区：[1]山西省中条山国有林管理局横河林场,山西阳城048100

出　　处：《山西林业科技》2023年第3期5-8,共4页Shanxi Forestry Science and Technology

摘　　要：以山西省段峪河林场油松人工林为研究对象,采用样地调查与数据分析相结合的方法,对油松样地的立地因子、林分因子与出材量进行分析,并将树种组成和龄期2个哑变量引入油松林分水平间伐出材模型。结果表明,龄期(0.62)、胸径(0.73)、林分密度(0.63)与林分出材量显著或极显著正相关,树种组成(-0.48)、坡度(-0.77)与林分出材量显著或极显著负相关。由此确定了3个初始油松林分水平间伐出材模型,均能在间伐强度基本一致的情况下较好地预测林分出材量。通过优化改进,最终确定了2个油松林分水平间伐出材模型,分别为VC=b×Age+c×DBH+d×SD和VC=b×Age+f×AL+g×TH。Taking Pinus tabulaeformis plantation in Duanyuhe Forest Farm of Shanxi Province as the research object,the site factors,stand factors and volume of Pinus tabulaeformis sample plot was analyzed using sample plot investigation and data analysis.2 dummy variables which were tree species composition and age were introduced to the Pinus tabulaeformis stand horizontal thinning volume model.The results showed that age(0.62),diameter at breast height(0.73),stand density(0.63)were significantly or highly significantly positively correlated with stand volume,while tree species composition(-0.48)and slope(-0.77)were significantly or highly significantly negatively correlated with stand volume.From this,3 initial Pinus tabulaeformis stand horizontal thinning volume models were determined,and all of which were able to predict stand volume well under roughly the same thinning intensity.Through optimization and improvement,2 Pinus tabulaeformis stand horizontal thinning volume models were ultimately determined which were VC=b×Age+c×DBH+d×SD and VC=b×Age+f×AL+g×TH.

关 键 词：油松人工林 树种组成 龄期 哑变量 出材量 模型构建 

分 类 号：S753.7[农业科学—森林经理学]