不同混交模式和种植密度对桉树混交林生长的影响  

Effects of Different Mixed Patterns and Planting Densities on the Growth of Eucalypt Mixed Plantations

作　　者：向旺 韦振道 伍琪[1,2] 朱慧 莫云善 李秋荔 罗伟 任世奇 XIANG Wang;WEI Zhendao;WU Qi;ZHU Hui;MO Yunshan;LI Qiuli;LUO Wei;REN Shiqi(Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,Guangxi,China;Nanning Eucalypt Plantation Ecosystem Observation and Research Station of Guangxi,Nanning 530002,Guangxi,China;Guangxi Zhuang Autonomous Region State-owned Qinlian Forest Farm,Qinzhou 535000,Guangxi,China)

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]南宁桉树森林生态系统广西野外科学观测研究站,广西南宁530002 [3]广西壮族自治区国有钦廉林场,广西钦州535000

出　　处：《桉树科技》2024年第1期34-40,共7页Eucalypt Science & Technology

基　　金：广西重点研发计划(桂科AB23026010);广西科技基地和人才专项(桂科23-026-272、桂科AD20325008)。

摘　　要：通过分析混交模式和种植密度对桉树混交林生长特征的影响,为桉树人工林高效、可持续经营提供科学依据。分别设置尾巨桉与红锥、黑木相思、白千层、香樟(B1),与灰木莲、大花序桉、米老排、柠檬桉(B2)2种混交模式和4种种植密度(A1:1.5 m×2.0 m;A2:2.0 m×2.8 m;A3:2.5 m×3.5 m;A4:3.0 m×4.2 m),比较混交模式和种植密度对混交树种树高、胸径、材积和保存率的影响。结果表明:(1)混交模式对尾巨桉生长影响较小,但A3、A4显著增加尾巨桉胸径和单株材积;(2)种植密度对混交树种树高生长影响不显著,但黑木相思和灰木莲在A1种植密度处理下的胸径和单株材积显著低于其他密度处理;(3)大花序桉和米老排A1种植密度处理保存率显著低于A3和A4密度处理,混交树种不同种植密度之间保存率没有显著差异。综合分析,认为A3是较好的种植密度。By analyzing the effects of mixture patterns and planting densities on the growth characteristics of eucalypts in mixed species plantations,this paper provides a scientific basis for the efficient and sustainable management of eucalypt plantations.Two mixed patterns of Eucalyptus urophylla×E.grandis,Castanopsishystrix,Acacia melanoxylon,Melaleuca-cajuputi,Cinnamomumcamphora(B1),E.urophylla×E.grandis,Manglietiaglauca,E.cloeziana,Mytilarialaosensis,Co-rymbiacitriodora(B2),and four planting densities(A1:1.5 m×2.0 m;A2:2.0 m×2.8 m;A3:2.5 m×3.5 m;A4:3.0 m×4.2 m).The effects of mixed patterns and planting densities on tree height,diameter at breast height(DBH),individual tree volume and survival rate of target tree species and mixed tree species were analyzed.The results showed that:(1)mixed patterns had little effect on the growth of E.urophylla×E.grandis,but the planting density(A3,A4)significantly increased average DBH and individual tree volume of E.urophylla×E.grandis.(2)Planting density had no significant effect on tree height growth of the mixed tree species,but DBH and individual tree volume of A.melanoxylon and M.glauca in the A1 planting density treatment were significantly lower than in the other density treatments.(3)In addition,the survival in the A1 planting density treatment of E.urophylla×E.grandis and M.laosensis was significantly lower than those in the A3 and A4 density treatments,and there was no significant difference in survival rates among different planting densities of other mixed tree species.Therefore,the growth of E.urophylla×E.grandis and mixed tree species was mainly affected by planting density,and the comprehensive analysis showed that A3 was a better planting density.

关 键 词：桉树 混交树种 种植密度 生长量 

分 类 号：S725.2[农业科学—林木遗传育种]