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1、第31卷第1期經(jīng)濟(jì)林研究Vol.31No.12013年3月NonwoodForestResearchMar.2013植物激素對(duì)薄殼山核桃種子萌發(fā)及幼苗生長(zhǎng)的影響李俊南,熊新武,習(xí)學(xué)良,劉恒鵬,王高升(云南省林業(yè)科學(xué)院漾濞核桃研究院,云南漾濞672500)摘要:為給薄殼山核桃育苗技術(shù)及苗木生產(chǎn)提供理論依據(jù),以薄殼山核桃種子為試材,GA3、IBA、IAA、NAA和6-BA分別設(shè)50、100、150、200、250mg/L的5個(gè)質(zhì)量濃度水平浸種7d后播種于沙床中,50d后對(duì)發(fā)芽數(shù)、蟲(chóng)害數(shù)、霉?fàn)€數(shù)和90d后
2、對(duì)地徑、苗高、根徑、根長(zhǎng)、須根數(shù)、葉數(shù)進(jìn)行調(diào)查和綜合比較分析。5種外源植物激素處理中,發(fā)芽率最高的是IAA100mg/L(98%),其次是IBA250mg/L(93.3%),NAA250mg/L、6-BA100mg/L和GA3250mg/L處理的發(fā)芽率均為90%。NAA150mg/L處理的幼苗最高,達(dá)15.1cm;地徑生長(zhǎng)值最大的處理是GA350mg/L,達(dá)0.31cm;GA3150mg/L根徑最大,達(dá)0.49cm;NAA100mg/L處理主根最長(zhǎng),達(dá)25.5cm;6-BA50mg/L處理須根數(shù)最多
3、,為53根;IAA250mg/L、6-BA50mg/L葉片數(shù)最多,有6片。薄殼山核桃種子經(jīng)外源植物激素浸泡后出芽率有明顯的提高,各處理發(fā)芽率均高于對(duì)照。GA3影響幼苗地上部和地下部的粗生長(zhǎng),中低質(zhì)量濃度的NAA有利于主根的長(zhǎng)生長(zhǎng),6-BA有利于側(cè)根的分生。IBA對(duì)幼苗苗高的影響較大。關(guān)鍵詞:薄殼山核桃;植物激素;發(fā)芽率;生長(zhǎng);種子中圖分類號(hào):S664.1文獻(xiàn)標(biāo)志碼:A文章編號(hào):1003—8981(2013)01—0081—06Effectsofdifferenthormonesonseedgermi
4、nationandseedlinggrowthinCaryaillinoensisLIJun-nan,XIONGXin-wu,XIXue-liang,LIUHeng-peng,WANGGao-sheng(YangbiHickoryResearchInstitute,YunnanAcademyofForestry,Yangbi672500,Yunnan,China)Abstract:Inordertoofferatheorybaseforseedling-raisingtechniquesandsee
5、dlingproductioninCaryaillinoensis,takingseedsinC.illinoensisasmaterials,germinationandgrowthindexesoftheseedswereinvestigated,comparedandanalyzedwhichweresoakedsevendaysinhormonesandthensowninthesandbed.GA3,IBA,IAA,NAA,6-BArespectivelyweresetfivemassco
6、ncentrationlevelsof50,100,150,200,250mg/L.Thegerminationindexesofgerminationnumber,numberofpestinfestationseeds,numberofmildewedandrotseedsafterraisingfor50days,andthegrowthindexesofgrounddiameter,height,rootdiameter,rootlength,fibrousrootsnumber,leave
7、snumberafterraisingfor90days.Inthefivekindsofexogenousplanthormonestreatments,thehighestgerminationrate(98%)isgainedinthetreatmentofIAA100mg/L,thenextisthetreatmentofIBA250mg/L(93.3%),andthegerminationratesofthethreetreatmentsofNAA250mg/L,6-BA100mg/Lan
8、dGA3250mg/Lare90%.Thehighestseedlingis15.1cmintheNAA150mg/Ltreatment,themaximumgrounddiameteris0.31cmintheGA350mg/Ltreatment,andthemaximumrootdiameteris0.49cmintheGA3150mg/Ltreatment,themaximummainrootlengthis25.5cmintheNAA100mg/Ltreatm