4种混交比例对桉树-红椎人工混交林生长和土壤养分的影响  

Effects of four mixed ratios on the growth and soil nutrient of Eucalyptus-Castanopsis hystrix mixed plantations

作　　者：杨嘉麒 邓海燕 张港隆 胡中洋 莫晓勇 YANG Jiaqi;DENG Haiyan;ZHANG Ganglong;HU Zhongyang;MO Xiaoyong(College of Forestry and Landscape Architecyure,South China Agricultural University,Guangzhou 510642,Guangdong,China)

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642

出　　处：《中南林业科技大学学报》2021年第11期90-97,共8页Journal of Central South University of Forestry & Technology

基　　金：国家重点研发计划项目(2016YFD0600505);广东省林业科技创新项目(2018KJCX028)。

摘　　要：【目的】探究不同混交比例对桉树-红椎混交林林分生长和土壤养分的影响,探索最佳桉树-红椎混交模式。【方法】在广东雷州半岛石岭林场种植了4种不同混交比例的桉树-红椎混交林:桉树与红椎带状混交3∶3,桉树与红椎带状混交3∶1,桉树与红椎行间混交1∶1,桉树与红椎带状混交5∶1,以桉树纯林(CK)作为对照,经过5 a生长后,对林木生长因子和林地土壤养分指标进行测定和分析。【结果】1)4种不同比例桉树-红椎混交林林分保存率均比桉树纯林高,且带状混交3∶3和行间混交1∶1桉树-红椎混交林在一定程度上改善土壤养分;带状混交3∶3、带状混交3∶1和行间混交1∶1桉树-红椎混交林均可有效促进桉树生长,带状混交5∶1桉树-红椎混交林抑制桉树生长;各混交林中红椎的胸径、树高和单株材积大小表现为带状混交5∶1>带状混交3∶3>行间混交1∶1>带状混交3∶1;4个林分间桉树和红椎胸径、树高、冠幅和单株材积均存在极显著差异。2)各林分类型中,桉树的单位面积蓄积量为纯林(CK)>带状混交3∶1>带状混交5∶1>行间混交1∶1>带状混交3∶3;红椎单位面积蓄积量为带状混交3∶3>行间混交1∶1>带状混交3∶1>带状混交5∶1,林分单位面积总蓄积量以带状混交3∶1桉树-红椎混交林最大,带状混交3∶3桉树-红椎混交林次之。【结论】带状混交3∶3桉树-红椎混交林的营造模式可作为种植桉树-红椎混交林推荐模式。【Objective】To study the effect of different mixed ratios on the growth of Eucalyptus-Castanopsis hystrix mixed plantations and soil nutrient,explore the best Eucalyptus-Castanopsis hystrix mixed model.【Method】Four types of Eucalyptus-Castanopsis hystrix mixed plantations were planted in Leizhou peninsula Shiling forest farm in Guangdong:Eucalyptus-Castanopsis hystrix mixed 3∶3,Eucalyptus-Castanopsis hystrix mixed 3∶1,Eucalyptus-Castanopsis hystrix mixed 1∶1,Eucalyptus-Castanopsis hystrix mixed 5∶1,with single species plantation of Eucalyptus(CK)as a control,growth factors and some soil nutrient indexes were determined and analyzed after 5 years.【Result】1)The stand preservation rates of the four different ratios of Eucalyptus-Castanopsis hystrix mixed plantations are higher than those of pure Eucalyptus forest,and strip mixed 3∶3 and inter-row mixed 1∶1 Eucalyptus-Castanopsis hystrix mixed plantations can improve soil nutrients to a certain extent;strip mixed 3∶3,strip mixed 3∶1 and inter-row mixed 1∶1 Eucalyptus-Castanopsis hystrix mixed plantations can effectively promote the growth of Eucalyptus,and strip mixed 5∶1 Eucalyptus-Castanopsis hystrix mixed plantation inhibits the growth of Eucalyptus;the DBH,height and individual volume of the Castanopsis hystrix in the mixed plantations are shown as strip mixed 5∶1>stripe mixed 3∶3>inter-row mixed 1∶1>strip mixed 3∶1;there were extremely significant differences in DBH,height,crown width and individual volume of Eucalyptus and Castanopsis hystrix among the 4 stands.2)Each stand type,Eucalyptus volume per unit area is pure Eucalyptus forest(CK)>strip mixed 3∶1>strip mixed 5∶1>inter-row mixed 1∶1>stripe mixed 3∶3;Castanopsis hystrix volume per unit area is stripe mixed 3∶3>inter-row mixed 1∶1>strip mixed 3∶1>strip mixed 5∶1.The total stand volume per unit area is the highest in the strip mixed 3∶1 Eucalyptus-Castanopsis hystrix mixed plantation,followed by the strip mixed 3∶3 Eucalyptus-Castanopsis hystrix mi

关 键 词：桉树-红椎混交林 林分生长 蓄积量 土壤养分 

分 类 号：S792.39[农业科学—林木遗传育种] S792.189[农业科学—林学]