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1、中国农学通报2014,30(3):139-145ChineseAgriculturalScienceBulletin不同浓度钾素对甜菜幼苗生理生化指标的影响1,22,31,21,21,21,2杨云，於丽华，彭春雪，邳植，郭夏立，孙菲，1,21,22,3孙学伟，赵慧杰，耿贵（1黑龙江大学生命科学院，哈尔滨150080；2黑龙江省普通高等学校甜菜遗传育种重点实验室，哈尔滨150080；3中国农业科学院甜菜研究所，哈尔滨150080）+摘要：试验采用1/2Hoagland营养液水培，研究不同浓度K对甜菜幼苗生长和生理生化指标的影响。+结果表明，甜菜幼苗叶片、叶柄、根系和整株的干物质量均随钾
2、素浓度提高而增加，在K浓度为+3.00mmol/L时最高；随K浓度提高，甜菜幼苗根系、叶柄、叶片钾含量，幼苗全氮、磷、钾积累量，叶片、叶+柄含水量，叶片相对含水量以及叶片面积随之逐步升高，3.00与6.00mmol/LK处理无明显差异；叶片叶绿素a、叶绿素b、叶绿素a+b含量，SOD、GPX活性，根系、叶柄和叶片全N含量随之逐步下降，3.00与+6.00mmol/LK处理无明显差异；叶片CAT活性，根系、叶柄和叶片P含量保持不变或变化无规律。在本+研究条件下，3.00mmol/LK是甜菜幼苗生长最佳营养浓度。关键词：甜菜；钾；抗氧化酶活性；氮磷钾含量中图分类号：S566.3文献标志码
3、：A论文编号：2013-1070EffectsofDifferentPotassiumConcentrationonPhysiologicalandBiochemicalIndexesofSugarBeetSeedlings1,22,31,21,21,21,2YangYun,YuLihua,PengChunxue,PiZhi,GuoXiali,SunFei,1,21,22,3SunXuewei,ZhaoHuijie,GengGui(1CollegeofLifeScience,HeilongjiangUniversity,Harbin150080;2KeyLaboratoryofSug
4、arBeetGeneticBreedingofHeilongjiangProvince,Harbin150080;3ChineseAcademyofAgriculturalScienceInstituteofSugarBeet,Harbin150080)+Abstract:Theeffectsofdifferentpotassium(K)concentrationonseedlinggrowth,physiologicalandbiochemicalindexesofsugarbeetwerestudiedusinghalf-strengthHoaglandnutrientsolut
5、ion.Theresultsshowedthatthedryweightofleaves,petioles,rootsandofthewholeplantofsugarbeetseedlingsincreased++withtheincreaseofKconcentration,andarrivedthehighestwhenKconcentrationwas3.00mmol/L.Besides,+Klevelinroots,petiolesandleaves,accumulationamountsoftotalnitrogen(N),phosphorus(P)andpotassiu
6、m)(Kinseedlings,petiolesandleaveswatercontent,relativewaterlevelinleavesandleafareaincreased+graduallywithincreaseinKconcentration,however,theseindexesshowednoobviousdifferencebetween+treatmentsof3.00and6.00mmol/LK.Nevertheless,thecontentsofchlorophylla,chlorophyllbandchlorophylla+b,activitieso
7、fSODandGPX,andNlevelinroots,petiolesandleavesdecreasedgraduallywith+theincreaseinKconcentration,whilenonotabledifferencewasobservedwhentreatedwith3.00and6.00+mmol/LK.Ontheotherhand,CATactivity,Pcontentinroots,petioles,andleavessho
