杉木短周期小径级速生材培育

ConstructionofaTreTrunkBiomasModelforShort-cycle

摘要:

以湖北省咸宁市咸安区 7~12a杉木短周期小径级速生材培育模式人工林为研究对象,用 96株解析木数据构建 该模式树干生物量模型 。结果表明:平均单木树干生物量为 18.64kg,其中 62.5%的样本树干生物量在 10~20kg,而主伐 年龄 9~10a的平均单木生物量为 20kg左右:以胸径为变量的 一 元方程和以胸径、树高为变量的二元方程均达到了较好 的拟合效果(R2>0.9),但二元方程拟合精度更高:经检验,最优 一元方程(W=0.104xD2.123)和最优二元方程(W=0.02x D1.486 xH1.362)的预估精度分别为 92.25%和 94.75%,均能满足生产应用需求和标准,为该栽培模式木材生物量估算提供 技术支持。

Abstract:

Thetretrunkbiomasmode1of7~12yearsCuninghamialanceolatashort-cyc1esma1-pathfast-growing p1antationinxian,anDistrict,xianningCity,HubeiProvincewasconstructedwiththedataof96ana1ytica1tres.There- su1tsshowedthattheaveragesing1etretrunkbiomaswas18.64kg,ofwhich62.5% ofthesamp1eswereintherangeof 10~20kg,andtheaveragesing1etrebiomaswasabout20kgintheageof9~10years.Theunivariateequationwith DBH asvariab1eandthebivariateequationwithDBHandtreheightasvariab1eachievedgoodfitingefect(R2>0.9), butthebivariateequationhadhigherfitingacuracy.Bytest,thepredictionacuracyoftheoptima1monadicequation (W=0.104×D2.123)andtheoptima1bivariateequation(W=0.02×D1.486 ×H1.362)were92.25% and94.75%,respec- tive1y,whichcou1dmettherequirementsandstandardsofproductionandapp1ication,andprovidetechnica1supportfor woodbiomasestimationinthiscu1tivationmode.