东川市薪炭林树种及造林技术的定量选择研究

Astudy on quantitative selection and silvicultural technique of fuelwood species in dongchuan manicipality

  • 摘要: 根据东川市环境条件、现有的资料和造林经验,1992年7月选择银合欢(Lecaena leucocephala),苏门答腊金合欢(Acacia farnesiana),巨桉(Eucalyptus grandis),铁刀木(Cassia siamca Lam),赤桉(Eucalyptus camaldulensis Dehn),直干桉(Eucalyptus maideni F. V. M.),圣诞树(Acacia dealbata Link),刺槐(Robinia pseudoacacia L),黑荆(Acaciamearnsii Willd),苦楝(Melia izedarach L),香须树(Aibizia odoratissima L. F. Bethn),木麻黄(Casuarina eguisetifolia)12个树种,在绿茂乡紫牛小江沙坝布置了-个裂区试验。1994年4月对试验进行调查,经过统计、分析、研究,12个树种在树高、地径、冠幅、材积上存在着极显著的差异,并从参试的12个树种中选出巨桉、赤桉、苦楝、银合欢、圣诞、直干桉、黑荆作为东川市推广的薪炭林树种。用各种造林技术与对照比较,制订出入选树种造林技术的标准。

     

    Abstract: Based on bilphysical conditions and silvicultural experiences in Dongchuan,12 fuelwood species (Acacia farnesiana,A.dealbafa,A.mearnsii willd,Albizia odoraatissima,Cassia siamee,Casuarina eguisetifolia,Eucalyptus grandis,E.camaldulensis,E.maideni Leucaena leucocephala,Melia izedarzch.Robinia Pseudoa-cacia)were selected and planted in Zhiniu Village,Lumon Town with a splite design ex-periment in July,1992.The measurement was taken in April 1994 about height,ground diameter,crown width and wood volume.The statistcal analysis showed thatthe difference was very significant among these 12 species.To avoid site influence,theintegrated index consisting of height,ground diameter,crown width,and wood vol-ume was applied as the first criteria for evaluating the aboveground growth of fuelwoodspecies.Two hundred kilograms per mu per year of biomass was the second criteria forspecies selection.Seven fuelwood species were selected and identified as extensionhelwood species in Dongchuan area according to the criteria.These seven species were Acacia mearnsii,Eucalyptus camaldulensis,E.grandis,E.maideni,Leucaena leucocephala,Melia zedarach and Acacia decilbala.In addition,different silvicultral techniquewas compared and best techiniques were evaluated and selected.Through the field trialwith these species,these methods and criteria proved to be practical.

     

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