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时间:2020-03-25
《降香黄檀轻基质容器苗分级标准研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、南方农业学报JournalofSouthernAgriculture2016.47(12):2103—2107ISSN2095一I191;CODENNNXAABhttp:}
2、wⅧ.nfnyxb.coinDOI:10.3969/j:issn.2095—1191.2016.12.2103降香黄檀轻基质容器苗分级标准研究黎明,黄柏华,韦叶桥,梁福江,曾冀(中国林业科学研究院热带林业实验中心,广西凭祥532600)摘要:【目的】探讨适合降香黄檀轻基质容器苗分级的方法和标准,为制定降香黄檀苗木培育技术规程提供参考依据。【方法】利用轻基质培育
3、降香黄檀实生苗,于苗龄9个月时测定苗高(H)、地径(D)、地上和地下部分生物量,计算每株苗木的总生物量、高径比及茎根比;应用相关分析法确定降香黄檀苗木的质量分级指标,采用逐步聚类、快速聚类和平均值-4-标准差划分降香黄檀苗木的分级标准;根据分级标准确定苗木的级别并开展造林试验,比较分析各级别苗木的造林效果,对成活苗木进行重新分级。【结果】应用平均值±标准差法分级的降香黄檀合格苗(I和II级苗)所占比例及造林9个月后各级别苗木的存活情况优于逐步聚类和快速聚类法;将造林9个月后成活的苗木进行重新分级发现,应用平均值±标准差法确定的合格
4、苗有10.5%转变为III级苗,有1.8%和37.9%的III级苗(不合格苗)分别转变为I和II级苗,采用逐步聚类和快速聚类两种方法分级的合格苗转变为III级苗的比率分别为23.2%和53.O%,III级苗转变为合格苗的比率分别为53.o%和80.2%。【结论】降香黄檀轻基质容器苗适宜采用平均值±标准差法进行分级,其分级标准为:I级苗H一>55.3cm,D≥7.9mm;II级苗24.4cm、5、关分析;平均值±标准差法;造林效果中图分类号:$723.4文献标志码:A文章编号:2095—1191(2016)12—2103—05ClassificationofcontainerseedlingsgrowingwithlightmediaforDalbergiaodoriferaLIMing,HUANGBo—hua,WEIYe—qiao,LIANGFu—Jiang,ZENGJi(ExperimentalCentreofTropicalForestry,ChineseAcademyofForestry,Pingxiang,Gua6、ngxi532600,China)Abstract:【Objective】GradingmethodandstandardforDalbergiaodoriferaT.Chenseedlingsincontainerswithfightmediawereinvestigatedinordertoprovidereferenceforformulatingcultivationtechniqueregulations.【Method]TakingD.odoriferaT.Chenseedlingsincontainerswithli7、ghtmediaasmaterials,seedlingheight(H),grounddiameter(D),above—groundbiomassandundergroundbiomassweremeasuredwhentheseedlingswerenine—month—old.Thentotalbiomass.seedlingheighttogrounddiameterratioandshoottorootratiowerecalculated.UsingcorrelationanalysistodetermineD.od8、oriferaT.Chenseedlingqualitygradingindexes,andusinggradualclustering,k-meansclusteringandmean±standarddeviationtodivideseedlinggradingstandard.Theseedlingsweregradedaccordingtotheclassificationstandardandaf-forestationexperimentwasconducted.Afforestationeffectsofseedl9、ingsatdifferentgradeswerecomparedandanalyzed.Thesurvivalseedlingswerere-graded.【ResuhlTheproportionofqualifiedseedlings(grad
5、关分析;平均值±标准差法;造林效果中图分类号:$723.4文献标志码:A文章编号:2095—1191(2016)12—2103—05ClassificationofcontainerseedlingsgrowingwithlightmediaforDalbergiaodoriferaLIMing,HUANGBo—hua,WEIYe—qiao,LIANGFu—Jiang,ZENGJi(ExperimentalCentreofTropicalForestry,ChineseAcademyofForestry,Pingxiang,Gua
6、ngxi532600,China)Abstract:【Objective】GradingmethodandstandardforDalbergiaodoriferaT.Chenseedlingsincontainerswithfightmediawereinvestigatedinordertoprovidereferenceforformulatingcultivationtechniqueregulations.【Method]TakingD.odoriferaT.Chenseedlingsincontainerswithli
7、ghtmediaasmaterials,seedlingheight(H),grounddiameter(D),above—groundbiomassandundergroundbiomassweremeasuredwhentheseedlingswerenine—month—old.Thentotalbiomass.seedlingheighttogrounddiameterratioandshoottorootratiowerecalculated.UsingcorrelationanalysistodetermineD.od
8、oriferaT.Chenseedlingqualitygradingindexes,andusinggradualclustering,k-meansclusteringandmean±standarddeviationtodivideseedlinggradingstandard.Theseedlingsweregradedaccordingtotheclassificationstandardandaf-forestationexperimentwasconducted.Afforestationeffectsofseedl
9、ingsatdifferentgradeswerecomparedandanalyzed.Thesurvivalseedlingswerere-graded.【ResuhlTheproportionofqualifiedseedlings(grad
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