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时间:2017-12-30
《东北落叶松不同器官的热值和灰分含量分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、2012年6月林业资源管理June2012第3期FORESTRESOURCESMANAGEMENTNo.3东北落叶松不同器官的热值和灰分含量分析王云霖,党永峰,曾伟生(国家林业局调查规划设计院,北京100714)摘要:植物热值是森林生态系统中物质循环和能量转化评价的重要指标。利用假设检验和回归分析方法,对东北落叶松不同器官的热值和灰分含量进行了研究。结果表明:林木不同器官的热值和灰分含量在统计上大都存在显著差异,去灰分热值从大到小排序为叶(21.57kJ/g)﹥枝(20.98kJ/g)﹥皮(20.73kJ/g)﹥根(19.88kJ/g)﹥干(19.51kJ/g),灰分含量排
2、序为叶(5.79%)﹥皮(2.48%)﹥枝(1.88%)﹥根(0.95%)﹥干(0.47%);树干热值和灰分含量随树干从下往上呈增加趋势,且上、中、下部均存在显著差异;树根热值和灰分含量从根茎、粗根到细根也呈增加趋势,且两两之间差异显著;地上部分的平均干质量热值、去灰分热值和灰分含量均大于地下部分(树根),且差异显著;不同器官的热值和灰分含量与林木直径、树高和起源等因子显著相关,但其影响程度不尽相同。关键词:干质量热值;去灰分热值;灰分含量;假设检验;回归分析;落叶松中图分类号:S718文献标识码:A文章编号:1002-6622(2012)03-0100-07Calorif
3、icValuesandAshContentsofDifferentOrgansofLarchinNortheasternChinaWANGYunlin,DANGYongfeng,ZENGWeisheng(AcademyofForestInventoryandPlanning,StateForestryAdministration,Beijing100714,China)Abstract:Calorificvaluesofplantsareimportantindicesforevaluatingandreflectingmaterialcycleandenergyconve
4、rsioninforestecosystems.Basedonthedataoflarch(Larixspp)innortheastChina,thecalorificvalues(CV’s)andashcontents(AC’s)ofdifferentplantorganswereanalyzedsystematicallyusinghypothesistestandregressionanalysisinthispaper.Theresultsshow:(i)theCV’sandAC’sofdifferentplantorgansarealmostsignificant
5、lydifferent,andtheorderbyAFCV(ash-freecalorificval-ue)fromthelargesttothesmallestisfoliage(21.57kJ/g),branches(20.98kJ/g),stembark(20.73kJ/g),root(19.88kJ/g),andstemwood(19.51kJ/g);andtheorderbyACisfoliage(5.79%),stembark(2.48%),branches(1.88%),root(0.95%),andstemwood(0.47%);(ii)theCV’sand
6、AC’sofstemwoodsareincreasingfromlowertotopsectionsoftrunk,andthoseoftop,middleandlowersectionsaresignificantlydifferent;(iii)theCV’sandAC’sofrootsareincreasingfromstumptolargeandsmallroots,andthosebetweeneachpairaresignificantlydifferent;(iv)themeanGCV(grosscalorificvalue),AFCVandACofabove
7、groundpartarelargerthanthoseofbelowgroundpart(roots),andthedifferencesarealsostatisticallysignificant;(v)theCV’sandAC’sofdifferentorgansaresig-nificantlyrelatedtodiameter,heightandoriginofthetree,buttheinfluencedegreesofthefactorsonCV’sandAC’sarenotthesame.Key
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