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1、中國水稻科學(xué)(ChinJRiceSci),2013,27(3):273-279http://www.ricesci.cnDOI:10.3969/j.issn.1001-7216.2013.03.007273砷脅迫下磷用量對不同磷效率水稻苗生長、磷和砷吸收的影響連娟郭再華*賀立源(華中農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院,湖北武漢430070;*通訊聯(lián)系人,E-mail:gzh2005@mail.hzau.edu.cn)EffectofDifferentPLevelsontheGrowth,PandAsAbsorptionofDiffe
2、rentP-efficiencyRiceVarietiesunderAsStressConditionsatSeedlingStageLIANJuan,GUOZai-hua*,HELi-yuan(ResourceandEnvironmentCollege,HuazhongAgriculturalUniversity,Wuhan430070,China;*Correspondingauthor,E-mail:gzh2005@mail.hzau.edu.cn)LIANJuan,GUOZaihua,HELiyuan.Effec
3、tofdifferentPlevelsonthegrowth,PandAsabsorptionofdifferentP-efficiencyricevarietiesunderAsstressconditionsatseedlingstage.ChinJRiceSci,2013,27(3):273-279.Abstract:Apottrialwasconductedtoclarifytheeffectofdifferentphosphorus(P)levelsonthegrowth,Pandarsenic(As)abso
4、rptionofP-efficientrice99011andP-inefficientrice99056underAsstressconditions.Pwasappliedatthreerates(0,30and150mg/kg)andAsatfiverates(0,25,50,100and200mg/kg)insoil.ResultsshowedthatapplicationofAsincreasedshootandrootAsconcentrationanddecreasedplantheight,tillern
5、umber,shootandrootdryweightofthetworicevarieties.ApplicationofPincreasedthegrowthaswellastherootAsconcentrationofthetworicevarieties.At25mg/kgand50mg/kgofAsinsoil,applicationof30mg/kgPdecreasedthetranslocationofAsfromrootstoshootsandapplicationof150mg/kgPincrease
6、dthetranslocationofAsfromrootstoshootsofthetworicevarieties.Underthesametreatment,shootandrootdryweightofP-efficientrice99011weresignificantlyhigherthanthoseofP-inefficientrice99056.UndertheAstreatment,thetranslocationfactorofAsinP-inefficientrice99056minimizedat
7、30mg/kgPtreatment.Keywords:phosphorus;arsenic;rice;arsenictranslocationfactor連娟,郭再華,賀立源.砷脅迫下磷用量對不同磷效率水稻苗生長、磷和砷吸收的影響.中國水稻科學(xué),2013,27(3):273-279.摘要:通過盆栽試驗研究了苗期砷脅迫下磷用量對磷高效水稻99011和磷低效水稻99056生長以及對P、As吸收的影響。試驗設(shè)3個磷水平(0、30、150mg/kg)和5個砷水平(0、25、50、100、200mg/kg)。結(jié)果表明,苗期施砷顯著
8、增加了兩個水稻品種地上部及地下部砷的含量,降低了兩個水稻品種的株高、分蘗數(shù)、地上部及地下部干質(zhì)量;施磷不但促進了兩個水稻品種的生長,而且還增加了根系對砷的吸收量。當(dāng)土壤砷濃度為25mg/kg和50mg/kg時,施用30mg/kg磷抑制了兩個水稻品種砷向地上部的轉(zhuǎn)移,但施用150mg/kg磷卻促進了砷向地上部的轉(zhuǎn)移。相
