10年生尾巨桉DH32-28萌芽林生长规律及经济效益研究  

Study on Growth Regularity and Economic Benefit of 10-year-old Eucalyptus urophylla×E.grandis DH32-28 Sprout Plantations

作　　者：朱原立 陈彪 文杰 陈永力 刘杰 雷福年 黄立智 周柄先 曹沅 杨继生 邓善宝 ZHU Yuanli;CHEN Biao;WEN Jie;CHEN Yongli;LIU Jie;LEI Funian;HUANG Lizhi;ZHOU Bingxian;CAO Yuan;YANG Jisheng;DENG Shanbao(Guangxi Zhuang Autonomous Region State-owned Qipo Forest Farm,Nanning 530034,Guangxi,China)

机构地区：[1]广西壮族自治区国有七坡林场,广西南宁530034

出　　处：《桉树科技》2024年第3期34-41,共8页Eucalypt Science & Technology

基　　金：广西自筹经费林业科技项目(2024GXZCLK43);开放课题(NES-2023KF05)。

摘　　要：采用样地调查和回归方程拟合的方法,研究10年生尾巨桉DH32-28生长规律和经济效益,以期为尾巨桉DH32-28人工林经营提供参考。结果表明:10年生尾巨桉DH32-28树高、胸径和单株材积分别达27.8 m、18.64 cm、0.301 m^(3);树高在第6年出现生长最高峰,生长量为1.32 m;胸径和单株材积在第8年出现生长最高峰,生长量为0.68 cm、0.030 m^(3)。树高级分布呈右偏的正态分布曲线,径阶分布呈左偏的正态分布曲线。树高-胸径生长曲线最优模型为y=0.001x3‒0.113x2+3.446x‒4.579。第8年是单株材积、单位面积蓄积量以及规格材增长最多的时期。第10年时,单株材积、单位面积蓄积量和规格材出材量分别达0.301 m^(3)、389.304 m^(3)·hm^(-2)、235.750 m^(3)·hm^(-2),按市场价格计算,销售总额可达到183885.00元·hm^(-2)。This study used field surveys and regression analysis to examine the growth patterns and economic benefits of 10-year-old Eucalyptus urophylla×E.grandis DH32-28,aiming to provide insights for the management of E.urophylla×E.grandis DH32-28 plantations.The findings revealed that at 10 years of age,E.urophylla×E.grandis DH32-28 achieved a height of 27.8 m,a diameter at breast height(DBH)of 18.64 cm,and individual tree volume of 0.301 m^(3).Height growth peaked in the 6th year with an increment of 1.32 m,while the maximum growth in DBH and individual tree volume occured in the 8th year,with increments of 0.68 cm and 0.030 m^(3),respectively.The height distribution was characterized by a right-skewed normal distribution,whereas the diameter distribution was left-skewed.The optimal model for the height-diameter growth curve was given by y=0.001x3‒0.113x2+3.446x‒4.579.The 8th year was identified as the period with the highest growth in individual tree volume,stand volume per unit area,and timber of specific dimensions.In the 10th year,the individual tree volume,stand volume per hectare,and timber yield reached 0.301 m^(3),389.304 m^(3)·hm^(-2),and 235.750 m^(3)·hm^(-2),respectively.Based on current market prices,the total sales revenue could reach 183885.00 yuan·hm^(-2).

关 键 词：尾巨桉 生长规律 经济效益 生长模型 

分 类 号：S714.8[农业科学—林学]