不同年龄序列巨尾桉人工林生长的坡位效应  

Slope Position Effects of Eucalyptus grandis×E.urophylla Plantations with Different Age Sequences

作　　者：王杰 李坤 方能干 刘秉兴 杨梅[2] WANG Jie;LI Kun;FANG Neng-gan(Guangxi State-owned Qipo Forest Farm,Nanning,Guangxi 530219;College of Forestry,Guangxi University,Nanning,Guangxi 530004)

机构地区：[1]广西国有七坡林场,广西南宁530219 [2]广西大学林学院,广西南宁530004

出　　处：《安徽农业科学》2023年第8期142-144,147,共4页Journal of Anhui Agricultural Sciences

基　　金：广西林业科技项目(桂林科研[2021]7号)。

摘　　要：[目的]了解不同立地条件下巨尾桉人工林生长差异。[方法]对七坡林场上思分场不同坡位的巨尾桉人工林进行连年(1~5年)监测。[结果]坡位显著影响巨尾桉人工林生长进程,其生长状况下坡最优,中坡次之,上坡较差;随着年限增加,巨尾桉人工林胸径、树高连年生长量和平均生长量逐渐降低,但蓄积生长量逐年增加;自第2年起,各坡位巨尾桉胸径、树高和蓄积连年生长量开始出现显著差异,总体表现为下坡>中坡>上坡,且随着年限增加,差异越加显著。[结论]在桉树人工林经营过程中,优先选择中、下坡进行造林,上坡林分应加大施肥量;桉树属于前期快速生长树种,应加强前期经营管理,确保质量和产量。[Objective]In order to understand the growth differences of Eucalyptus grandis×E.urophylla plantation under different site conditions.[Method]The plantation of Eucalyptus grandis×E.urophylla at different slope positions in the Qipo Forest Farm was monitored for successive years(1-5 years).[Result]The slope position significantly affects the growth process of Eucalyptus grandis×E.urophylla plantation,and its growth condition was the best downslope,followed by the mid-slope,and the upslope was poor;The annual growth and average growth decreased gradually,but the accumulated growth increased year by year;From the second year,there were significant differences in DBH,tree height and annual growth of Eucalyptus grandis×E.urophylla in different slope positions,and the trend was downslope>mid-slope>upslope,and as the years went on,the differences became more significant.[Conclusion]In the management process of Eucalyptus grandis×E.urophylla plantation,the middle and lower slope should be preferentially selected for afforestation,and the amount of fertilizer should be increased in the upslope stands.Eucalyptus grandis×E.urophylla is a fast-growing tree species in the early stage,and early management should be strengthened to ensure the quality and yield.

关 键 词：巨尾桉 坡位 连年生长量 平均生长量 

分 类 号：S725[农业科学—林木遗传育种]