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1、红松落叶松不同带状混交比例造林经济效益的研究陈杰(辽宁省森林经营研究所丹东118002)摘要:为了探索出山区林业经济发展的新途径,充分发挥林地立体综合开发经济效益,辽宁省森林经营研究所的科研人员于1985年开始,在本溪市桓仁县八里甸镇马鹿泡村,开展了“红松、落叶松不同带状混交比例造林经济效益差异”课题研究;试验设五种不同带状混交比例类型,即:Ⅰ类混交类型为3红:1落;Ⅱ混交类型为5红:3落;Ⅲ混交类型为4红:3落;Ⅳ混交类型为5红:1落;Ⅴ混交类型为2红:1落。各类型林分经过二十几生长变化,现已进入中、幼
2、龄林阶段,不同林分的经济效益出现明显的分化。通过对各类型林分的调查与分析,得出试验初步结论:4红:3落、5红:3落两种带状混交比例类型比较好,不仅林分林木木材产量高,且红松球果收入较好,林分总产值均高于其它混交类型,适于在红松、落叶松均能良好生长的地区广泛推广应用;5红1落、3红1落两种混交比例类型,虽红松球果收益较好,但木材收益差,林分总产值较低,因此不能充分发挥林地立体综合效益;2红:1落的混交比例类型,木材产值收益虽较高,但由于落叶松较多,生长到一定时期后,红松长期处于落叶松林冠下,生长受到严重压制
3、,红松由于得不到很好地生长,甚至有少量红松植株出现枯死,最终成为落叶松为主导的纯落叶松林。结果表明:此混交类型效益最差;红松与落叶松的混交林,通过对落叶松进行渐进式地强度不同的抚育间伐,能很大程度地提高红松的结实率和产量,大幅度地提高该混交类型林分的总产值。关键词:混交类型、产值、经济效益MixedwithdifferentproportionoflarchpineforestbeltofeconomicbenefitsChenjie(ForestResearchInstituteofLiaoningPr
4、ovinceDandong118002)Abstract:Inordertoexploreamountainforestnewwaysofeconomicdevelopment,comprehensivedevelopmentofthree-dimensionalfulleconomicbenefitsofforestland,ForestManagementInstituteofLiaoningProvince,in1985researchersbeganHuanreninBenxiCity,theto
5、wnofRedDeerCounty,bubbleAustinBaliVillage,launchedthe"pineandlarchforestindifferentpercentageofbandedmixedeconomicdifferences"research;testsetratiooffivedifferenttypesofmixedband,namely:Ⅰclassofmixedtypeis3red:1down;Ⅱmixedtype5Red:3down;Ⅲmixedtypeis4red:3
6、down;Ⅳmixedtypeis5red:1down;Ⅴmixedtype2Red:1down.Aftertwodozendifferenttypesofforestgrowthandchange,hasenteredinto,theyoungforeststage,theeconomicbenefitsofdifferentforestapparentdifferentiation.Standbyforalltypesofinvestigationandanalysisoffindingsofthet
7、rialpreliminaryconclusions:4Red:3down,5Red:3stripoffthetwotypesofmixedratioisbetter,notonlyhighyieldtimberforesttrees,andpineballincomeisbetterthanotherstandsaremixedtypesofoutput,suitableforredpineandlarchcangrowwellinwiderangeofapplicationareas;5red1dow
8、n,31dropofredmixedratiooftwotypes,althoughpineconesgoodincome,butincomepoortimber,forestoutputlow,sotheforestcannotbefullythree-dimensionalcomprehensivebenefits;2Red:1dropintheproportionofmixedtype,timbervalue,altho