蔡家川流域人工刺槐生物量模型的构建与比较  

Construction and comparison of artificial Robinia pseudoacacia biomass model in Caijiachuan Watershed

作　　者：李福明 冯泳翰 赵怡 朱景康 魏曦 梁文俊[1] LI Fuming;FENG Yonghan;ZHAO Yi;ZHU Jingkang;WEI Xi;LIANG Wenjun(College of Forestry,Shanxi Agriculture University,Taigu,Shanxi 030800,China)

机构地区：[1]山西农业大学林学院,山西太谷030800

出　　处：《森林与环境学报》2024年第1期62-70,共9页Journal of Forest and Environment

基　　金：国家自然科学基金项目“水土保持与固碳协同的晋西黄土区低效林结构与功能智能化调控”(32371970);“黄土残塬区刺槐林分结构与水土保持功能的作用机制”(31901365);“根系竞争与地上林分生长的关联机制:以林分改造为例”(31971644)。

摘　　要：利用蔡家川流域不同立地条件下48株刺槐样木生物量的实测数据,以胸径、树高、冠幅、冠长及胸径、树高的复合因子为自变量,构建生物量异速生长模型、多元线性模型和相容性生物量模型。采用决定系数(R^(2))、均方根误差(RMSE)、估计标准误差(SEE)、总相对误差(TRE)、平均相对误差(ARE)和平均百分比误差(MPE)等6个指标对模型进行拟合度和精确度的检验。结果表明:以胸径(D_(BH))、树高(h)的复合因子构建的生物量模型估测效果较好。3种模型的检验指标均在可接受的范围内,均适用于蔡家川流域刺槐生物量的预测。其中,多元线性模型对树枝、树叶生物量预测效果最佳,预测精度为90.11%和89.72%;相容性生物量模型对总树干、根系和总生物量的预测精度高达91.38%、90.83%、93.90%,并且解决了各器官生物量与总生物量的相容性问题。构建的模型中,相容性生物量模型的估测效果最好,多元线性模型和生物量异速生长模型次之。Based on the measured biomass data of 48 robinia acacia trees under different site conditions in Caijiachun River Basin,the biomass allometric growth model,multiple linear model and compatible biomass model were constructed with the composite factors of diameter at breast height(D_(BH)),height,crown width,crown length and D_(BH) tree height as independent variables.Six indexes including determination coefficient(R^(2)),root mean square error(RMSE),estimated standard error(SEE),total relative error(TRE),average relative error(ARE)and average percentage error(MPE)were used to test the fit degree and accuracy of the model.The results showed that the biomass estimation model based on D_(BH) and height was effective.The test indexes of the three models are all within the acceptable range,and they are all suitable for the prediction of robinia acacia biomass in Caijiachuan Watershed.Among them,the multiple linear model predicted the biomass of branches and leaves with the best prediction accuracy of 90.11%and 89.72%.The prediction accuracy of the compatible biomass model is as high as 91.38%,90.83%and 93.90%for the total trunk,root and total biomass,and the compatibility problem between the biomass of each organ and the total biomass is solved.Among the models constructed,the compatible biomass model has the best estimation effect,followed by multiple linear model and biomass allometry model.

关 键 词：刺槐 生物量异速生长模型 多元线性模型 相容性生物量模型 蔡家川流域 

分 类 号：S758.1[农业科学—森林经理学]