基于不同水肥措施下的桉树二元材积方程研究  

Study on Binary Volume Equation of Eucalyptus Based on Different Water and Fertilizer Measures

作　　者：黄锋 刘文泉 孔杰君 邱权 何茜 李吉跃 苏艳 HUANG Feng;LIU Wenquan;KONG Jiejun;QIU Quan;HE Qian;LI Jiyue;SU Yan(College of Forestry and Landscape Architecture,South China Agriculture University,Guangzhou 510520,Guangdong,China)

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510520

出　　处：《桉树科技》2021年第3期17-22,共6页Eucalypt Science & Technology

基　　金：国家重点研发计划“桉树、马尾松人工林生产力形成的生理”(2016YFD0600201,2016YFD060020102);国家自然科学基金“桉树人工林生产力对旱季水分输入的变化”(31800527)。

摘　　要：以不同水肥措施下的20株4年生桉树样木为材料,通过伐倒解析样木收集建模资料。在干形差异分析的基础上,将4个处理分为无施肥与施肥两组处理进行模型拟合。采用模型选优法从6个备选模型中分别筛选出无施肥处理和施肥处理的最优模型。分别将两组处理最优模型的检验结果与广东省韶关市编制的山本和藏式二元材积模型V=0.00012D^(1.8878)H^(0.6362)的模型检验结果进行比较,选出误差最小的模型作为该试验地的二元材积方程。结果表明:无施肥处理的最优模型为模型6孟宪宇式,材积方程为V=−0.014675+0.001078D^(2)−0.000105D^(2)H−0.000155H+0.000050×DH^(2),施肥处理的最优模型为模型6孟宪宇式,材积方程为V=0.067455−0.009072D^(2)+0.000831D^(2)H+0.028237H−0.000340DH^(2)。模型6孟宪宇式相较于韶关市编制的山本和藏式,误差更小,精度更高,更适合于该试验地桉树人工林材积和蓄积量的估算。Data were obtained from 20 felled 4-year-old Eucalyptus sample trees,that had been grown under different water and fertilizer regimes.Based on stem shape analyses,the four treatments were divided into two groups:no fertilization and fertilization for model fitting.The selection methods used to select the optimal model for no fertilization treatment and the fertilization treatment involved examination of six alternative models.The results of the two groups of optimal models were compared with the model test results of Yamamoto and Tibetan binary volume model V=0.00012D^(1.8878)H^(0.6362) compiled by Shaoguan City,Guangdong Province,respectively,and the model with the least error was selected as the binary volume equation of the test site.The results showed that the optimal model of no fertilization treatment was model 6 Meng Xianyu comprising the following:V=−0.014675+0.001078D^(2)−0.000105D^(2)H−0.000155H+0.000050×DH^(2).For the fertilization treatment,the optimal model was model 6 Meng Xianyu comprising the following:V=0.067455−0.009072D^(2)+0.000831D^(2)H+0.028237H−0.000340DH^(2).Model 6 Meng Xianyu volume model has smaller error and higher precision than Yamamoto and Tibetan volume model compiled by Shaoguan City,whilst also being more suitable for the estimation of individual tree volume and also stand volumes of Eucalyptus plantation in this experimental site.

关 键 词：桉树 单株材积 模型拟合 二元材积方程 

分 类 号：S758.2[农业科学—森林经理学]