滇南地区高纤维纸浆材桉树混交培育模式探究  

Study on the Mixed Cultivation Model of High Fiber Pulpwood Eucalyptus in South Yunnan Province

作　　者：胡敏 李亚茜 Hu Min;Li Yaxi(Forestry Service Center in Lianzhu Town,Mojiang Hani Autonomous County,Mojiang,Yunnan 654800,China)

机构地区：[1]云南省墨江哈尼族自治县联珠镇林业服务中心,云南墨江654800

出　　处：《绿色科技》2023年第3期153-156,162,共5页Journal of Green Science and Technology

摘　　要：桉树种植面积广泛,多以桉树纯林为主,随着多年多代连续经营,出现了土壤退化、植株生长不良,病虫害频发等问题。杉木是重要的速生丰材树种,生长周期较桉树长,中性偏阴,根系浅。桉树与杉木混交经营,生长空间上互补,改变桉树纯林结构功能单一的同时,通过长短结合,可提升林木生长量和林木质量。基于此,对比了桉树纯林、桉树+杉木混交培育经营模式在相同立地条件下生长状况,通过测量单株和样地成活率、胸径、树高、蓄积、枯落物厚度等方面,探讨了桉树+杉木混交林多年可持续经营的可行性。结果表明:成活率与经营模式无必然联系,桉树+杉木混交林与桉树纯林样地,成活率均较高,仅有个别样地低于85%。桉树混交林平均单株桉树树高与桉树纯林差值介于-0.02~1.6,仅第2年的其中一个样地低于纯林样地0.02,其余均优于桉树纯林样地。桉树混交林平均单株桉树胸径均高于桉树纯林,差值介于0.13~0.62,第6年差值最大。桉树混交林平均单株桉树蓄积均优于桉树纯林,差值介于0.0003631~0.011368374,第6年差值最大。并推测在二代桉树时期土壤理化性质将优于桉树纯林,样地总蓄积将超过桉树纯林。As the main timber tree species,eucalyptus grows fast with deep root systems,tall trees,positive,and extensive planting areas.Most of them are pure eucalyptus forests.With continuous operation for many years,problems such as soil degradation,poor plant growth,and frequent occurrence of diseases and pests have emerged.Cunninghamia lanceolata is an important fast-growing and timber rich tree species.Its growth cycle is longer than that of eucalyptus,with neutral shade and shallow root system.Theoretically,the mixed management of Eucalyptus and Cunninghamia lanceolata can complement each other in growth space,change the single structure and functions of eucalyptus pure forest,and improve the growth and quality of trees through the combination of length.This paper attempts to compare the growth status of the pure Eucalyptus forest and the mixed Eucalyptus+Cunninghamia lanceolata cultivation and management mode under the same site conditions.By measuring the survival rate,diameter at breast height,tree height,stock,litter thickness and other aspects of the single plant and sample plots,statistical analysis is carried out to explore the feasibility of the long-term sustainable management of the mixed Eucalyptus+Cunninghamia lanceolata forest.It is concluded that the survival rate and preservation rate of the mixed Eucalyptus+Cunninghamia lanceolata management model are both high,with only a few plots lower than 85%,which is not necessarily related to the management model.The difference between the average single Eucalyptus tree height of the mixed Eucalyptus forest and that of the pure Eucalyptus forest is between-0.02 and 1.6.Only one sample plot in the second year is 0.02 lower than that of the pure Eucalyptus forest sample plot,and the rest are better than that of the pure Eucalyptus forest sample plot.The average DBH of single Eucalyptus in the mixed Eucalyptus forest is higher than that in the pure Eucalyptus forest,with the difference between 0.13 and 0.62,and the largest difference in the sixth year.The average

关 键 词：桉树 杉木 混交林 可持续经营 生长量 

分 类 号：S792.39[农业科学—林木遗传育种]