水杨酸对毛枝五针松壮苗的形成及生理指标的影响.PDF

中国农学通报 2017,33(1):29-32 Chinese Agricultural Science Bulletin 水杨酸对毛枝五针松壮苗的形成及生理指标的影响 向振勇，张珊珊，康洪梅，杨文忠 （云南省林业科学院珍稀濒特森林植物保护和繁育国家林业局重点实验室，昆明650201） 摘 要：为了克服毛枝五针松幼苗发育不良、根系细弱不发达、死亡率高等问题，采用营养袋育苗试验， 用不同浓度的水杨酸(SA)溶液(0 、0.25 、0.5、1.0 、1.5、2.0 g/L)喷洒毛枝五针松幼苗，研究不同浓度的SA 溶液对毛枝五针松壮苗及生理指标的影响，筛选出最佳的SA 溶液浓度。结果表明：SA 溶液可显著改善 毛枝五针松幼苗的生长状况，能够扩大植株根系体积，提高根系活力，增强毛枝五针松幼苗的抗逆性，有 助于壮苗的形成。在不同SA 处理中，以喷施1 g/L 浓度时，形成的壮苗效果最好，比对照高295.18% ，且 抗逆性最高。建议对毛枝五针松幼苗进行SA 处理时，最适浓度为1 g/L 。 关键词：水杨酸；毛枝五针松；壮苗；抗逆性 中图分类号：S-723.1+ 1 文献标志码：A 论文编号：cas EffectofSalicylicAcidonHighQualitySeedlingFormingandPhysiologicalIndexofPinuswangii XiangZhenyong,ZhangShanshan,KangHongmei,YangWenzhong (KeyLaboratoryofRareandEndangeredForestPlantsofStateForestryAdministration, YunnanAcademyofForestry,Kunming650201) Abstract:InordertosolvetheproblemsthatPinuswangiiseedlingshavepoorgrowth,poorlydevelopedroots, and very higher mortality rate, seedlings planted in nutritional bags were used in this study. Different concentrationsofsalicylicacid(SA)(0,0.25,0.5, 1.0, 1.5,2.0g/L)weresprayedonP.wangii seedlings.The effectsofdifferentconcentrationsofSAonformingandphysiologicalindexesofhighqualityseedlingwere studied.Theoptimalconcentrationwasscreened.Theresultshowedthat,SAimprovedthegrowthofP.wangii seedlingssignificantly,enlargedtherootvolume,stimulatedtherootactivitiesandenhancedstressresistance. SothatSAsolutionfacilitatedtheformationofhighquality P.wangii seedlings. 1 g/LSAindifferentSA treatmentshadthebeststrongseedlingeffect,whichwas 295.18%higherthanthecontrol,andtheseedlings alsohadthestrongeststressresistance. 1g/LSAtreatmentwasrecommendedforP.wangiiseedlings. Keywords:salicylicacid;Pinuswangii;highqualityseedling;resistance