主伐择伐和栽植密度对林下套种楠木林分生长量的影响  

Effect of Main Cutting,Selection and Planting Density on the Growth of Interplanting Phoebe zhennan S.Lee Stand

作　　者：杨庆平 Yang Qingping(Weimin State-Owned Forest Farm,Shaowu,Fujian 354000,China)

机构地区：[1]福建省邵武卫闽国有林场,福建邵武354000

出　　处：《绿色科技》2023年第19期113-116,共4页Journal of Green Science and Technology

基　　金：福建省林业科技项目(编号:闽林文[2021]35号)。

摘　　要：为分析主伐择伐保留、套种栽植密度对成熟杉木林下套种楠木林分生长量的影响。于2015年福建省邵武卫闽国有林场开展试验研究,选取立地条件相近的26年生成熟杉木纯林进行主伐择伐,保留3个密度处理,分别为600、750、900株/hm^(2),于2015年1月在林下套种2年生楠木,套种密度分别为1200、1050、900株/hm^(2),并设置主伐择伐保留900株/hm^(2),杉木不套种楠木的对照组,于2023年3月对林分生长量进行了比较。结果表明:主伐择伐保留杉木密度600株/hm^(2)、林下套种楠木1200株/hm^(2)时主林层杉木、亚林层楠木的平均树高、平均胸径、平均单株立木材积高于其他密度处理和对照组(P<0.05);主林层杉木单位面积蓄积随主伐择伐保留密度增加而增加,亚林层楠木单位面积蓄积随择伐保留密度增加而减少,但各处理间总单位面积蓄积对比无显著差异(P>0.05)。对于成熟杉木林,主伐择伐保留密度增加后,对杉木及林下套种楠木生长产生不良影响,但是林分生长量未有显著变化,考虑原因可能是套种楠木正处于幼龄林阶段。The effects of selective cutting retention and interplanting density on the growth of Phoebe zhennan S.Lee stand under mature Cunninghamia lanceolata forest were analyzed.An experimental study was carried out in Weimin State-Owned Forest Farm in Shaowu,Fujian Province in 2015.26-year-old mature pure forest of Cunninghamia lanceolata with similar site conditions was selected for main cutting,and three density treatments were retained,namely 600,750,900 trees/hm^(2).Two-year-old Phoebe zhennan S.Lee was planted under the forest in January 2015.The interplanting densities were 1200,1050,900 trees/hm^(2),respectively,and a control group of 900 trees/hm^(2) were selected for main cutting.The stand growth of Cunninghamia lanceolata trees was compared in March 2023.The average tree height,average DBH and average tree volume of Cunninghamia lanceolata and sub-forest Phoebe zhennan S.Lee were higher than those of other density treatments and control group(P<0.05)when the density of preserved Cunninghamia lanceolata was 600 trees/hm^(2) and that of underforest Phoebe zhennan S.Lee was 1200 trees/hm^(2).The stock per unit area of Cunninghamia lanceolata in the main forest increased with the increase of the selective cutting retention density,and the stock per unit area of Cunninghamia lanceolata in the sub-forest decreased with the increase of the main cutting density,but there was no significant difference in the total stock per unit area between different treatments(P>0.05).For mature Cunninghamia lanceolata forest,the growth of Cunninghamia lanceolata and underforest intercropping Phoebe zhennan S.Lee was adversely affected by the increase of primary cut selection retention density,but there was no significant change in stand growth,which may be due to the fact that the intercropping Phoebe zhennan S.Lee was in the young forest stage.

关 键 词：杉木 楠木 林下套种 主伐择伐保留 林分生长量 

分 类 号：S792[农业科学—林木遗传育种]