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机构地区:[1]西充县林业局,四川西充637200 [2]四川省林业调查规划院,成都610081
出 处:《四川林勘设计》2014年第2期43-45,共3页Sichuan Forestry Exploration and Design
摘 要:收集了西充县342株柏木的地径、胸径、树高,通过多个模型拟合选优的方法,建立了柏木树高曲线和胸径—地径模型,并利用柏木二元材积表,编制了一元地径材积表,经检验,平均误差、标准差、均方误都不超过±10%,为制表合格精度3级,精度满足要求,可用于估算西充县采伐或被盗伐柏木的材积。Based on data from ground diameter, DBH and tree height of 342 Cupress funebr/s, tree height curve, DBH and ground diameter model of Cupressfunebr/s were established through optimization of multiple model fitting. Furthermore, unitary ground diameter volume table was established using binary volume table of Cupress funebris. The average error, standard deviation and mean square error were not exceed ± 10%. The tabulation accuracy was class 3 and the accuracy could meet the requirement. The unitary ground diameter volume table could be used to estimate the volume of felled or stolen Cupress funebris in Xichong County
分 类 号:S791.310.6[农业科学—林木遗传育种]
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