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1、林业科学研究2010,23(3):425～429ForestResearch文章编号:1001-1498(2010)03-0425-0511个能源林杨柳无性系热值季节及年度变化11*李洪,胡建军(1中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091)摘要:测定了5个乔灌木柳树无性系和6个杨树无性系夏季、冬季不同组分的干质量热值,研究了1年生杨、柳无性系皮部和干部在夏季和冬季的干质量热值的变化情况,以及随着平茬次数的增加1年生柳树无性系全株热值的变化规律。结果表明:杨、柳树无性系不同组分在不同季节干质量热值的变化不完全一样,但是在冬季皮部、干部和全株热值
2、均比在夏季时高;5个柳树无性系不同季节年份的干质量热值变化规律基本一致,冬季热值为1年生根1年生干>2年生根1年生干>3年生根1年生干,柳树无性系间的1年生根1年生干冬季热值与2年生根1年生干冬季热值的差异极显著,与3年生根1年生干冬季热值的差异显著,灌木柳的热值比乔木柳的高;6个杨树无性系(1年生根1年生干)的冬季全株干质量热值>夏季全株干质量热值,但无性系间差异均不显著;1年生柳树全株冬季干质量热值普遍高于杨树。关键词:能源林;杨树;柳树;干质量热值中图分类号:S792.11S792.12文献标识码:ASeasonalandAnnualDynamicsoftheGrossC
3、aloricValueofElevenPoplarandWillowClonesLIHong,HUJian-jun(ResearchInstituteofForestry,ChineseAcademyofForestry;KeyLaboratoryofTreeBreedingandCultivation,StateForestryAdministration,Beijing100091,China)Abstract:ThegrosscaloricvalueoffiveSalixandsixPopulusclonesharvestedinsummerandwinterwerede
4、terminedtoexplorethechangeofgrosscaloricvalueonone-year-oldpoplarandwillowbarkandtrunkinthetwoseasons.Andthegrosscaloricvaluechangeonthewholetreeofone-year-oldwillowclonesafterseveralharvestswerealsodiscussed.Theresultsshowthatthegrosscaloricvalueofdifferentfractionsofwillowandpoplararenotth
5、esame.However,thegrosscaloricvaluesofthebark,trunkandthewholetreeinwinterwerehigherthanthoseinsummer;thevariationoffivewillowcloneswereconsistentwitheachother,thegrosscaloricvalueofone-year-oldtrunkwithone-year-oldrootinwinter>thegrosscaloricvalueofone-year-oldtrunkwithtwo-year-oldrootinwint
6、er>thegrosscaloricvalueofone-year-oldtrunkwiththree-year-oldrootinwinter,thegrosscaloricvalueofone-year-oldtrunkwithone-year-oldrootinwinterandthatofone-year-oldtrunkwithtwo-year-oldrootinwinteramongdifferentwillowclonesreachedsignificantlevelatP=0.01,thegrosscaloricvalueofone-year-oldtrunkw
7、iththree-year-oldrootinwinteramongdifferentwillowclonesreachedsignificantlevelatP=0.05,thegrosscaloricvalueofshrubwillowwerehigherthanthatoftreewillow;Concerningsixpoplarclones,thegrosscaloricvalueofone-year-oldtrunkwithone-year-oldrootinwinterwasb
