长汀红壤侵蚀区马尾松林生物量估算模型的构建  

Biomass Estimation of Pinus massoniana Forest in a Redsoil Erosion Region in Changting County of Fujian Province

作　　者：项佳[1] 余坤勇[1] 陈善沐 吴清泉 刘健[1] 陈昌雄[1] Xiang Jia;Yu Kunyong;Chen Shanmu;Wu Qingquan;Liu Jian;Chen Changxiong(Fujian Agriculture and Forestry University,Fuzhou 350002,P.R.China;Fujian Monitoring Station of Water and Soil Reservation;Fujian Agriculture and Forestry University)

机构地区：[1]福建农林大学,福州350002 [2]福建省水土保持试验站

出　　处：《东北林业大学学报》2019年第5期58-65,共8页Journal of Northeast Forestry University

基　　金：国家自然科学基金项目(31770760);福建省水利厅科技专项(MSK201705);福建农林大学科技创新专项(CXZX2016060)

摘　　要：以长汀红壤侵蚀区马尾松为研究对象,通过整株收获法获取34株马尾松立木材积和生物量,分析不同龄级、径级马尾松材积和生物量分配格局,采用胸径(D)、树高(H)等变量建立立木材积模型,采用材积量(V)、胸径(D)、树高(H)、冠长(C_l)等变量建立树干、树冠及地上生物量模型,进而拟合区域林分生物量模型,使用独立样本检验并比较优选模型估测效果。结果表明:34株马尾松的树龄变化范围为19～42 a,立木材积量和立木生物量变化范围分别为0.004 4～0.194 9、2.733 9～140.331 4 kg/株,树龄与材积量、生物量相关性不显著;各器官生物量分配为干材(57.67±8.28)%、树枝(24.15±7.33)%、树叶(10.79±3.17)%、干皮(7.38±1.39)%,全林分中3个径阶(8、10、12 cm)蓄积量、生物量均超过总量的50%;所有模型确定系数均大于93%,单木模型中,以胸径-树高组合为自变量的模型拟合效果更佳;马尾松立木材积、地上生物量、树干生物量、树冠生物量及林分生物量模型中,各优选模型预估精度均达77%以上,其中立木材积、地上生物量及林分生物量优选模型比已有模型估测值的总相对误差、平均相对误差均有所降低,估测值更接近实际值。因此,通过构建该区域马尾松生物量方程,补充了长汀红壤侵蚀区马尾松立木材积表及生物量表。With Pinus massoniana in Red Soil Erosion Area, Changting County of Fujian Province, the volume and biomass of P. massoniana was analyzed by using the whole-tree harvesting method. First, we analyzed the relationship between age, DBH and volume, and compared volume and biomass allocation patterns of different organs at different age and DBH classes. Second, we selected appropriate independent variables to develop allometric equations. We selected the DBH and tree height as independent variables to establish single volume model, selected the volome, DBH, tree height, crown length and other independent variables to establish the trunk biomass model, the crown biomass model and single wood biomass model, and fitted the regional forest biomass estimation model. At last, we used independent sample to test the errors and accuracy of the optimal model, and compared the estimation results of the general model for volume and biomass of P. massoniana in Fujian Province. The age range of 34 Pinus massoniana varies from 19 to 42 a, average single wood volume varies from 0.004 4 to 0.194 9 m^3, above-ground single wood biomass varies from 2.733 9 to 140.331 4 kg, and there is no significant correlation between tree age and volume and biomass. The biomass allocation ratio of each organ was stem without bark biomass(57.67±8.28)%, branch biomass(24.15±7.33)%, leaf biomass(10.79±3.17)%, and bark biomass(7.38±1.39)%. The volume and biomass of the three DBH classes(8, 10, and 12 cm) in the whole forest exceeded 50% of the total amount. R^2 for all models is greater than 93%, DBH-tree height combined variable can improve the fitting effect of single volume and biomass model. The optimal Single wood volume mode, Single wood biomass model, Trunk biomass model, Crown biomass model, Forest biomass model have an accuracy of more than 77%, the total relative error and average relative error of optimized single wood volume model, single wood biomass model, and forest biomass model are lower than those general model. The prediction accu

关 键 词：红壤 土壤侵蚀 马尾松 生物量 生长模型 

分 类 号：S791.248[农业科学—林木遗传育种]