植物生长延缓剂对柠条生长与其抗性的影响

《植物生长延缓剂对柠条生长与其抗性的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、-------摘要本论文选用植物生长延缓剂(Profile2SC)对柠条(CaraganakorshinskiiKom.)进行生长和抗性两方面研究。主要结论如下：(1)通过大田试验，研究不同苗龄柠条土壤施用植物生长延缓剂，对其株高、地径、生物量和根系的影响。结果表明：土壤施用植物生长延缓剂对不同苗龄柠条的株高和地上生物量都有一定抑制作用，而对地径和根长、根系表面积和根系体积均有不同程度的促进作用。其中，同一苗龄的柠条经不同用量的植物生长延缓剂处理后，根长、根系表面积和根系体积较对照都有增加的趋势，经40ml/穴植物生长延缓剂处理的柠条

2、效果最明显。比较经植物生长延缓剂处理不同苗龄的柠条发现，苗龄越小，植物生长延缓剂对根长，根系表面积和根系体积的影响越大。(2)通过室内植物生长延缓剂浸种试验，研究干旱胁迫下柠条幼苗叶片相对含水量、叶绿素含量、丙二醛含量等7项生理抗旱指标的变化情况，采用隶属函数进行抗旱性综合评价。结果表明：经植物生长延缓剂浸种处理的柠条幼苗，较对照抗旱性明显增加。抗旱性强弱的顺序依次为1:11>1:16>1:21>1:6>1:1>对照；而且随着浸种时间的增加，抗旱性也表现出增加的趋势。关键词：植物生长延缓剂；柠条；形态结构；浸种；生理特性-------

3、----TheEffectsofplantGrowthRegulatorsonCaraganakorshinskiikom.SeedlingGrowthandStressResistantPhysiologyAbstractThispaperistheresearchaboutthegrowthregulatorsoncaraganakorshinskiikom.seedlinggrowthandstressresistantphysiology.Themainresulttoshow:(1)Studytheeffectofdiffe

4、rentseedlingageofcaraganatoitsplantheight,grounddiameter,biomassandrootsystembythefieldexperiment.TheresultsshowedthatthegrowthretardantscouldinhibitdifferentseedlingageofCaragana’sgroundplantheightandbiomass,butcouldpromoteitsgrounddiameterandsurfaceareaandvolumeofroot

5、.ThesameseedingageCaraganawhichdisposedwithdifferentamountgrowthretardants,thelength,surfaceareaandvolumeofrootallincreased.Disposedwith40ml/point’sincreasedobviously.Comparedtheage,thesmallertheseeding,theeffectofthegrowthretardantstoitsthelength,surfaceareaandvolumeof

6、root.(2)Studythechangeoftheleaves’relativewatercontent,chlorophyllcontent,MDAcontent,etc.oftheseedingindroughtstress.Maketheoverallmeritbymembershipfunction.Theresultsshowedthattheseeding’sdroughtresistancewhichtreatedwithgrowthretardantsbyseedsoakingincreasedobviouslyc

7、omparedwithcontrolsample.Theorderfromstrongtoweakofthedroughtresistanceis1:11>1:16>1:21>1:6>1:1>controlsample.Alongwiththeincreasingofthesoakingseedtime,thedroughtresistanceincreasedtoo.Keywords:Plantgrowthretardant；Caraganakorshinskiikom；Morphologicalstructure；Seedsoak

8、ing；PhysiologicalpropertyDirectedby:Prof.WANGJiApplicantforMasterdegree:YANGMin(WaterandSoilConservationandDes