早熟禾不同品種苗期抗旱性研究.pdf

1、東北農(nóng)業(yè)大學(xué)碩士學(xué)位論文早熟禾不同品種苗期抗旱性研究姓名：馮淑華申請學(xué)位級別：碩士專業(yè)：果樹學(xué)指導(dǎo)教師：陳雅君2003.6.1童!!查些查蘭窒耋堡圭蘭堡篁蘭StudiesonDroughtResistanceofSeedlinginBluegrassCultivarsAbstractInthisresearch9bluegrasscultivarswerecollected：1nativebluegrass(PoapratensisVa

2、rancepsGard，BIuegrassw)andt1eotherswerecultivarswhichwereusedusuallyinthenorthInthetestthemethodofdroughtcontinuallywasadapted，andassociatedfieldexperimentandanalysisinthelab，researchedtheeffectsofdroughtonthephysicaland

3、chemicalcharacteristics，morphologicalcharacteristicsofbluegrassseedling，thesametime，determinedtheeffectofdroughtonthegerminationforce，last，9culfivarswerecategorizedbvdrought——resistanceThemainresultswereshowedasfollowing

4、：lSeedsweretreatedbyPEG，lowconcentration0025m∥mladvancedthegermination，butashighconcentration005m∥ml，0075m∥ml，010mg／ml，thegerminationwasinhibited，andtheinhibitiondegreeaggravatedwithPEGconcentrationjncreaseddififefencewa

5、sevidentamong9bluegrasscultivars2TherelativewatercontentsofIeavesin9cuttivarstreateddecreasedcomparedwithcktheamountdecreasedwasincreasedgraduallyAfterwateredagain，therelativewatercontentsof】eavesrecovereddifieFencewasma

6、rkedamongthecu[tivars3Thelostwaterrateof】eavesofIeftbodyof9cultivarstreateddecreasedcomparedwithckwithinl4daysduringdroughtincreasedas21daysAfterwateredagainthelostwaterrateof】eftofIeavesdecreasedcomparedwi血oktooandIowed

7、greatly4TherelativeelectricaJconductivityrate(％)oftheIeavesincreasedin9bluegrasscultivarstreatedbydrought，increasedgraduallywithtimeAfterwateredagain，therelativeelectrica】conductivityrate(％1oftheleavesrecoveredamong9cult

8、ivarstreatedwiththemwhichwere2ldaysunderdroughtbutdidnotreachldentical】eve】withck5Thechlorophyllcontentsofleavesweregreaterthanckamong9cultJvarswithin】4dayswiththeexceptionoftheBluegrassw[essthanckas21daysAfterwateredaga

9、in，excludingtheBluegrassw，theotherswerelessthancktoo6Thefleeprolinecontentsoftheleaveswereaccumulatedquitealotbydroughtamong9cultivarstreated，andincreasedwithtimeofdroughtAtierwateredagain，reco～reredcomparedwiththoseof21

10、daysofdrought，changewasdistinctive，butdidnotreachidenticalleve【withck7Therootdrymassaccumulationwasinhibitedbydroughtamong9cultivarstreated，therootdrymassfowed，andtheamountdecreasedwasgreaterwithtimeAfterwateredagain，rec