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1、中国水稻科学(ChinJRiceSci),2013,27(3):273-279http://www.ricesci.cnDOI:10.3969/j.issn.1001-7216.2013.03.007273砷胁迫下磷用量对不同磷效率水稻苗生长、磷和砷吸收的影响连娟郭再华*贺立源(华中农业大学资源与环境学院,湖北武汉430070;*通讯联系人,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连娟,郭再华,贺立源.砷胁迫下磷用量对不同磷效率水稻苗生长、磷和砷吸收的影响.中国水稻科学,2013,27(3):273-279.摘要:通过盆栽试验研究了苗期砷胁迫下磷用量对磷高效水稻99011和磷低效水稻99056生长以及对P、As吸收的影响。试验设3个磷水平(0、30、150mg/kg)和5个砷水平(0、25、50、100、200mg/kg)。结果表明,苗期施砷显著
8、增加了两个水稻品种地上部及地下部砷的含量,降低了两个水稻品种的株高、分蘖数、地上部及地下部干质量;施磷不但促进了两个水稻品种的生长,而且还增加了根系对砷的吸收量。当土壤砷浓度为25mg/kg和50mg/kg时,施用30mg/kg磷抑制了两个水稻品种砷向地上部的转移,但施用150mg/kg磷却促进了砷向地上部的转移。相
