不同混交模式对楠木生长的影响  

Effects of Different Mixed Patterns on the Growth of Phoebe zhennan

作　　者：何芳 He Fang(Guangxi Beijiang River Forest Farm of Rongshui Miao Autonomous County,Liuzhou 545300,Guangxi Zhuang Autonomous Region,China)

机构地区：[1]柳州市融水苗族自治县国营贝江河林场,广西壮族自治区柳州545300

出　　处：《农业技术与装备》2025年第1期121-123,126,共4页Agricultural Technology & Equipment

摘　　要：为了探讨不同混交模式对楠木生长的影响,设置楠木纯林(T1)、楠木与杉木混交(T2)、楠木与毛竹混交林(T3)和楠木与桉树混交林(T4)4种处理方式,对比分析了5 a生楠木的树高、胸径、材积、冠幅、叶绿素含量、枝下高、侧枝轮数、分枝角及最粗侧枝直径等生长指标。研究发现,与楠木纯林相比,楠木与杉木混交林能显著提高楠木的树高、胸径和材积,其中树高提高了96.58%,胸径和材积也分别有显著增长;楠木与毛竹混交林也能显著提高楠木的树高、胸径和材积,但效果略低于楠木与杉木混交林;楠木与桉树混交林的楠木生长指标表现介于楠木纯林和其他混交林之间;杉木和毛竹混交林对楠木的冠幅和叶绿素含量有促进作用,楠木与桉树混交林对楠木冠幅和叶绿素含量的影响相对较小。结果表明,混交模式对楠木生长具有显著的促进作用,其中楠木与杉木混交林、楠木与毛竹混交林对楠木的生长促进效果更为明显。In order to investigate the effects of different mixed modes on the growth of Phoebe zhennan,pure Phoebe zhennan forest(T1)and mixed Phoebe zhennan and Cunninghamia lanceolata(T2),mixed forest of Phoebe zhennan and Phyllostachys edulis(T3)and mixed forest of Phoebe zhennan and Cunninghamia lanceolata(T4)were compared and analyzed the growth indexes of 5 year old Phoebe zhennan,such as tree height,DBH,volume,crown width,chlorophyll content,height under branches,number of lateral branches,branch angle and diameter of the thickest lateral branches.The results showed that compared with pure Phoebe zhennan forest,the tree height,DBH and volume of Phoebe zhennan increased significantly in mixed Phoebe zhennan and Cunninghamia lan‐ceolata forest,and the tree height increased by 96.58%,DBH and volume also increased significantly.The tree height,DBH and vol‐ume of Phoebe zhennan were also significantly increased in the mixed forest of Phoebe zhennan and Phyllostachys edulis,but the ef‐fect was slightly lower than that of the mixed forest of Phoebe zhennan and Cunninghamia lanceolata.The growth index of mixed Phoebe zhennan and Cunninghamia lanceolata forest was between pure Phoebe zhennan forest and other mixed forest.The mixed forest of Cunninghamia lanceolata and Phyllostachys edulis promoted the crown width and chlorophyll content of Phoebe zhennan,but the mixed forest of Phoebe zhennan and Cunninghamia lanceolata had relatively little effect on the crown width and chlorophyll content of Phoebe zhennan.The results showed that the mixed pattern had significant effect on the growth of Phoebe zhennan among them,the growth promotion effect of Phoebe zhennan and Cunninghamia lanceolata mixed forest and Phoebe zhennan and Phyllo‐stachys edulis mixed forest was more obvious.

关 键 词：楠木 混交模式 树高 胸径 材积 冠幅 

分 类 号：S792.24[农业科学—林木遗传育种]