資源描述:
《低溫對(duì)豇豆種子萌發(fā)和出苗的影響.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、南方農(nóng)業(yè)學(xué)報(bào)JOURNALOFSOUTHERNAGRICULTURE2013.44(11):1785—1790ISSN2095—1191;CODENNNXAABhttp://www.nfnyxb.cnDOI:10.3969/j:issn.2095-1191.2013。11。1785低溫對(duì)豇豆種子萌發(fā)和出苗的影響張獻(xiàn)英1,唐力生2,猶昌艷,,胡飛”(1華南農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,廣州510642;2廣東省氣候與農(nóng)業(yè)氣象中心,廣州510080)摘要:【目的】研究低溫對(duì)豇豆種子萌發(fā)及出苗的影響,為華南地區(qū)冬種豇豆拒避低溫影響提供參考?!痉椒ā恳杂桶?號(hào)和粵紅5號(hào)豇豆種子為試材,在人工氣候箱內(nèi)研究不
2、同溫度(10、15、20和25oC)、不同溫度組合和不同溫度持續(xù)時(shí)間長(zhǎng)短對(duì)種子萌發(fā)和出苗的影響?!窘Y(jié)果】不同溫度處理試驗(yàn)結(jié)果顯示,10℃時(shí)兩個(gè)豇豆品種起始萌發(fā)比25℃滯后12~13d,油白1號(hào)的萌發(fā)率為33.3%,粵紅5號(hào)為63.O%;15℃時(shí)兩個(gè)品種起始出苗時(shí)間k925cc滯后9~10d,油白l號(hào)的出苗率為22.0%,粵紅5號(hào)為18.0%;10oC時(shí)兩品種均未能出苗。在低溫處理不同時(shí)間條件下,10℃低溫持續(xù)5d以上種子萌發(fā)率顯著降低,油白1號(hào)為74,1%,粵紅5號(hào)為44.4%;出苗過程中10℃低溫持續(xù)2d以上或15℃低溫持續(xù)5d以上,種子出苗率顯著降低。油白1號(hào)在相同低溫條件下比粵
3、紅5號(hào)的抗性表現(xiàn)略好?!窘Y(jié)論】在華南地區(qū)冬種豇豆如果出現(xiàn)10℃低溫的天氣,或15℃以下低溫天氣持續(xù)5d以上不宜進(jìn)行播種;若播種后10℃低溫持續(xù)2d以上或15℃低溫持續(xù)5d以上,要采取保溫等措施,確保較高的出苗率。關(guān)鍵詞:豇豆;低溫;萌發(fā);出苗;華南地區(qū)中圖分類號(hào):$643.4文獻(xiàn)標(biāo)志碼:A文章編號(hào):2095—1191(2013)11-1785~06Effectsoflowtemperaturesonseedgerminationandseedlingemergenceofcowpea(Vignaunguiculata)ZHANGXian—ying1,TANGLi-shen92,YOU
4、Chang—yanl,HUFeil+(1CollegeofAgriculture,SouthChinaAgriculturalUniversity,Guangzhou510642,China,2GuangdongClimateandAgrometeorologyCenter,Guangzhou510080,China)Abstract:【Objective】Theeffectsoflowtemperatureonseedgerminationandseedlingemergenceofcowpeawerestudiedtoprovidereferencesforplantingeow
5、peaatlOWtemperatureinSouthChina.【Method】TwovarietiesofcowpeasYoubaiNo.1andYuehongNo.5seedswereusedastestmaterials.Germinationandemergenceofcowpeaseedsweretestedunderdifferenttemperatures(10,15,20and25oC),differenttemperaturecombinations,anddifferentlastingtimeoftemperatures.Theexperimentswereco
6、nductedinartificialclimatechambers.【Result】Thetestresultsshowedthatbegin—ninggerminationtimeoftwovarietiesofcowpeaat10oCwaslagged12一13dcomparingtothatat25℃.GerminationrateofYoubaiNo.1andYuehongNo.5was33.3%and63.0%.respectively.Beginninggerminationtimeoftwovarietiesofcowpeaat15℃waslagged9—10dcom
7、paringtOthat25℃.GerminationrateofYoubaiNo.1andYuehongNo.5was22,0%and18.0%.respectively.Buttheywereunabletoemergeat10℃.Duringprocessofgerminating.thegerminationratedecreasedsignificantlyiftheseedswerekeptat10℃for5days.Gmlninationra