两个杨树无性系生长进程动态分析  

Dynamic Analysis on the Growth of Two Poplar Clones

作　　者：魏蕾[1] 曹帮华[1] 魏洁[2] 曹玉翠[1] 刘凤[1] 

机构地区：[1]山东农业大学林学院,山东泰安271000 [2]潍坊职业学院,山东潍坊261031

出　　处：《西南林学院学报》2009年第2期20-22,43,共4页Journal of Southwest Forestry College

基　　金：山东省农业良种工程项目资助(鲁科农字【2006】90号)

摘　　要：利用Logistic方程对2个17年生杨树无性系I-107和W-141的树高、胸径和材积生长进程进行拟合。结果表明:用Logistic方程拟合效果显著(P<0.000 1),相关系数皆在0.97以上。并以此将2个无性系的生长过程分为生长前期、速生期和生长后期3个阶段,生长量在3个阶段表现出"慢—快—慢"的节律,对各生长阶段的生长特点进行分析,不同无性系的速生期持续时间有一定差异,但无论是哪个无性系,材积的速生点、进入速生期时间、结束速生期时间均比树高和胸径晚,且速生期持续时间短,树高和胸径之间差异不大。Logistic equation was applied to model the growth course of the height, diameter at breast height （DBH） and the timber volume of 17-year-old poplar trees of two clones. The results showed that the fit effect of the model was significant（P 〈0. 000 1 ）and the correlation coefficients were more than 0. 97. Based on the modeled growth course equation, the tree growth of the both poplar clones could be divided into three periods, namely the survival period, fast-growing period and post-growing period, showing the ＇ slow-fast-slow＇ rhythm. There were differences in duration of each growth stage for the different clones. No matter what poplar clones, the rapid growth time of volume occurred later than those of height and DBH, the rapid growth duration of timber volume was shorter than those of the height and DBH but there were little differences between the height and DBH growth indexes.

关 键 词：杨树 无性系 生长规律 LOGISTIC方程 生长模型 

分 类 号：S792.110.6[农业科学—林木遗传育种]