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1、中国农学通报2012,28(25):101-105ChineseAgriculturalScienceBulletin油茶苗木质量分级标准研究1,21,21,21,21,21,21,2彭邵锋,陈永忠,杨小胡,王湘南,马力,王瑞,陈隆升(1湖南省林业科学院,长沙410004;2国家林业局油茶研究开发中心,长沙410004)摘要:为了提高油茶出圃苗木质量,规范苗木市场,制定出科学合理的油茶苗木质量分级标准,在湖南、江西、广西等油茶主产区,选取1年生嫁接苗、1年生实生苗、2年生嫁接苗的苗圃9个,采用小样方随机抽样和主成分分析法,调查研究了油茶苗木的苗高(H)、地径(D)、侧根长(L)、叶片数
2、,筛选出苗木质量分级指标。结果表明:苗高、地径和侧根长可作为油茶苗木分级质量指标。油茶苗木质量分级标准为:1年生嫁接苗:I级苗H≥15cm,D≥0.25cm;II级苗H≥10cm,D≥0.20cm;1年生实生苗:I级苗H≥25m,D≥0.30cm,L≥10cm;II级苗H≥15cm,D≥0.25cm,L≥7cm;2年生嫁接苗:I级苗H≥40cm,D≥0.40cm,L≥15cm;II级苗H≥25cm,D≥0.30cm,L≥10cm。关键词:油茶;苗木分级;嫁接苗;实生苗;主成分分析中图分类号:S794.4文献标志码:A论文编号:2012-1325StudyontheClassificat
3、ionofSeedlingQualityofOil-teaCamellia(Camelliaoleifera)1,21,21,21,2PengShaofeng,ChenYongzhong,YangXiaohu,WangXiangnan,1,21,21,2MaLi,WangRui,ChenLongsheng(1HunanAcademyofForestry,Changsha410004;2CamelliaoleiferaResearchandDevelopmentCenterofStateForestryAdministration,Changsha410004)Abstract:Inor
4、dertoimprovethequalityofseedlingsandstandardizethemarketandformulatescientificallyrationalstandardsforseedlingsofoil-teacamellia,throughmethodofsmallsampleplotandrandomsamplingandprincipalcomponentsanalysis,theseedlingheight,grounddiameter,lateralrootlengthandleavenumberofoil-teacamellia,whichin
5、cludedannualgraftedseedlings,annualseedlingsandbiennialgraftedseedlings,wereinvestigatedin9nurseriesdistributedinHunan,JiangxiandGuangxi.Meanwhile,theindiceswhichcouldbeusedforseedlinggradingwereconsidered.Theresultsshowedthatseedlingheight,grounddiameterandmainrootlengthwereemployedforthequalit
6、yguidelineofseedlinggrading.Thequalitygradingstandardsofthethreekindsofseedlingswereobtainedasfollowing:annualgraftedseedlings(seedlingheight≥15cm,grounddiameter≥0.25cmasgradeI;seedlingheight≥10cm,grounddiameter≥0.20cmasgradeII);annualseedlings(seedlingheight≥25cm,grounddiameter≥0.30cm,lateralro
7、otlength≥10cmasgradeI;seedlingheight≥15cm,grounddiameter≥0.25cm,lateralrootlength≥7cmasgradeII);biennialgraftedseedlings(seedlingheight≥40cm,grounddiameter≥0.40cm,lateralrootlength≥15cmasgradeI;seedlingheight≥25cm,grounddiam