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《不同養(yǎng)分缺乏對(duì)烤煙根系形態(tài)及營(yíng)養(yǎng)生長(zhǎng)的影響.pdf》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、中國(guó)煙草科學(xué)ChineseTobaccoScience2015-04,36(2)不同養(yǎng)分缺乏對(duì)烤煙根系形態(tài)及營(yíng)養(yǎng)生長(zhǎng)的影響李碉,賴(lài)勇林’,王軍,王行2,沈宏(1.華南農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,廣州510642;2.廣東省煙草南雄科學(xué)研究所,廣東南雄512400)摘要:為了弄清礦質(zhì)元素缺乏對(duì)煙苗生長(zhǎng)的影響,以K326和湘煙四號(hào)兩個(gè)烤煙品種幼苗為材料,在氮、磷、鉀、鈣、鎂、硫、鐵缺乏條件下觀察煙株的缺素癥狀,并測(cè)定根系形態(tài)和植株生物量。結(jié)果表明,兩個(gè)烤煙品種在7種缺素條件下地上部和根系均出現(xiàn)各自特有的癥狀,其中缺鐵癥狀出現(xiàn)最早,缺硫癥狀出現(xiàn)最晚。缺氮處理促進(jìn)K326和湘煙四號(hào)烤煙根系生長(zhǎng),其中根系生物量分別
2、比對(duì)照增加80.0%和78.1%,然而地上部生物量明顯下降。而缺硫處理對(duì)兩個(gè)烤煙品種的根系形態(tài)和地上部生物量影響不大。其他缺素處理下,兩個(gè)品種的根系和地上部生物量明顯下降,K326品種的側(cè)根數(shù)也顯著降低,但是湘煙四號(hào)品種僅在缺鎂和缺鐵處理中降低明顯。關(guān)鍵詞:烤煙;缺素;根系形態(tài);生物量;營(yíng)養(yǎng)生長(zhǎng)中圖分類(lèi)號(hào):$572.06文章編號(hào):1007—5119(2015)02-0060—06DOI:10.13496~.issn.1007-5l19.2015.02.01lEfectofDiferentNutrientDeficienciesonRootMorphologyandVegetativeGrowt
3、hinFlue.CuredTobaccoLIYue,LAIYonglin,WANGJun2,WANGHang,SHENHong(1.CollegeofAgronomy,SouthChinaAgriculturalUniversity,Guangzhou510642,China;2.NanxiongInstituteofTobaccoResearch,Nanxiong,Guangdong512400,China)Abstract:TwotobaccocultivarsK326andXiangyan4wereselectedtoinvestigatenutrientdeficiencysympto
4、ms,rootmorphology,andbiomassunderthenitrogenfN),phosphorus(P),potassium(K),calcium(Camagnesium(Mg),sulfur(S)andiron(Fe)deficienttreatmentsinordertoidentifytheefectsofnutrientdeficienciesontobaccoseedling.Theresultsindicatedthattheshootsandrootsofbothcultivarsappearedspecificsymptomsunder7elementdefi
5、ciencytreatments.Amongthem,F(xiàn)edeficiencyresultedintheappearanceoftheearliestdeficient-symptom,butSdeficiencyresultedinthelatestsymptom.Comparedtothecontrol,NdeficiencypromotedrootgrowthofK326andXiangyan4,andtherootbiomassincreasedby80.0%and78.1%,respectively.However,Ndeficiencydecreasedshootbiomassof
6、bothtobaccocultivars.Sdeficiencyhadtheleasteffectonrootmorphologyandplantbiomassoftwocultivars.Undertheotherelementdeficiencytreatments,thebiomassofshootsandrootsdecreasedremarkablyforbothcultivars.ThelateralrootnumberofK326alsodeclinedrapidly,however,forXiangyan4,itslateralrootnumberreducedsharplyo
7、nlyunderMgandFedeficienttreatments.Keywords:flue-curedtobacco;nutrientdeficiency;rootmorphology;biomass;vegetativegrowth煙草是我國(guó)農(nóng)業(yè)生產(chǎn)中重要的經(jīng)濟(jì)作物,其影響,前人已作了大量研究,但不同生育期、收入是我國(guó)的重要經(jīng)濟(jì)來(lái)源l】]。煙草的正常生長(zhǎng)、不同品種的煙草對(duì)不同元素缺乏的響應(yīng)