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时间:2020-03-27
《不同土壤类型下重金属Cd对水稻剑叶光合特性和产量构成的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(6):1021—1026JournalofAgro—EnvironmentScience不同土壤类型下重金属Cd对水稻剑叶光合特性和产量构成的影响范中亮-,杨菲·,吴琦·,季辉1,张卫建1,2(1.南京农业大学应用生态研究所,南京210095;2.中国农业科学院作物科学研究所,北京100081)摘要:以杂交籼稻(K优818)为材料,设置不同cd浓度水平,采用盆栽试验,研究了不同土壤类型下(潮土和水稻土)重金属Cd对剑叶光合特性和水稻产量及其构成的影响。结果显示,在3mg·kg。浓度水平下,与对照相比,两种土壤类型下Cd处理均提高了水稻剑叶净光合速率(只),其中
2、潮土条件下只提高了6.4%;而当Cd处理浓度达到7mg·kg。时,两种土壤条件下只均显著下降,其中水稻土条件下只与对照相比下降了13.8%。Cd在低浓度水平(1—3mg·kg-1)时,两种土壤类型下水稻结实率和单穗重均略有下降;但在高浓度水平(5~7mg·kg。1)下。水稻结实率和单穗重均显著下降(P3、RicePhotosyntheticCharacteristicsofFlagLeafandYieldComponentsUnderTwoSoilTypesFANZhong-lian91,YANGFeil,WUQil,JIHuil,ZHANGWei-jian啦(1.InstituteofAppliedEcology,NanjingAgriculturalUniversity,Nanjing210095,China;2.InstituteofCropScience,ChineseAcademyofAgriculturalSciences,Beijing100081,China)Abstract4、:Increasingattentionshavebeenpaidtothefoodsafetyalongwithpeople’slivingimprovement.Cdisoneofthemostdeadlyheavymetaltohumanhealthy.Duetounreasonableuseandmanagement,aconsiderableareaoffarmlandsoilhasbeencontaminatedbyCd.Inor-dertounderstandtheimpactsofsoilCdonriceproduction,apotcultureexperimentwasc5、onductedwithonericevarietyofhybridIndicaKU818undertwosoiltypes(alluvialsoilandpaddysoil)in2008,NanjingCity.Fivesoiltreatmentlevels(O、1、3.5、7mgCd·kg-1soil)werese—leeredwiththreereplicates.TheeffectsofsoilCdonflagleafphotosynthesis,chlomphyUfluorescencecharacteristicsandgrainyieldeompo—nentswereteste6、dinthisexperiment.TheresultsshowedthatbelowtheCdtreatmentlevelof3mg·kg一,thenetphotosynthesisrates(只)ofriceflagleafsignificantlyincreasedinthetwosoiltypes,andtheincrementWas6.4%inthealluvialsoil.Abovethelevelof3mg。kg一,thevaluesof只significantlydecreasedinthetwosoiltypes,andthereductionWas13.8%atthele7、velof7mg。kg。1comparedtotheCKinthepaddysoil.Also,belowthelevelof3mg·kg。(1-3mg·kg。),thesinglespikeweightandseed-settingratesofriceslightlyreducedrelativetothecontr01.butthereductionWassignificantcomparedtothe
3、RicePhotosyntheticCharacteristicsofFlagLeafandYieldComponentsUnderTwoSoilTypesFANZhong-lian91,YANGFeil,WUQil,JIHuil,ZHANGWei-jian啦(1.InstituteofAppliedEcology,NanjingAgriculturalUniversity,Nanjing210095,China;2.InstituteofCropScience,ChineseAcademyofAgriculturalSciences,Beijing100081,China)Abstract
4、:Increasingattentionshavebeenpaidtothefoodsafetyalongwithpeople’slivingimprovement.Cdisoneofthemostdeadlyheavymetaltohumanhealthy.Duetounreasonableuseandmanagement,aconsiderableareaoffarmlandsoilhasbeencontaminatedbyCd.Inor-dertounderstandtheimpactsofsoilCdonriceproduction,apotcultureexperimentwasc
5、onductedwithonericevarietyofhybridIndicaKU818undertwosoiltypes(alluvialsoilandpaddysoil)in2008,NanjingCity.Fivesoiltreatmentlevels(O、1、3.5、7mgCd·kg-1soil)werese—leeredwiththreereplicates.TheeffectsofsoilCdonflagleafphotosynthesis,chlomphyUfluorescencecharacteristicsandgrainyieldeompo—nentswereteste
6、dinthisexperiment.TheresultsshowedthatbelowtheCdtreatmentlevelof3mg·kg一,thenetphotosynthesisrates(只)ofriceflagleafsignificantlyincreasedinthetwosoiltypes,andtheincrementWas6.4%inthealluvialsoil.Abovethelevelof3mg。kg一,thevaluesof只significantlydecreasedinthetwosoiltypes,andthereductionWas13.8%atthele
7、velof7mg。kg。1comparedtotheCKinthepaddysoil.Also,belowthelevelof3mg·kg。(1-3mg·kg。),thesinglespikeweightandseed-settingratesofriceslightlyreducedrelativetothecontr01.butthereductionWassignificantcomparedtothe
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