简介：Thesystemofriceintensification(SRI)isaproductionsystemthatinvolvestheadoptionofcertainchangesinmanagementpracticesforricecultivationthatcreateabettergrowingenvironmentforthecrop.Thissystemwascomparedwithconventionalpracticesandassessedunderorganicandinorganicmanagement.SRIpracticesshowedsignificantresponseinrootnumber,numberofeffectivetillersperhill,daystofloweringandharvestindex.Inaddition,SRIwasfoundeffectiveinminimizingpestanddiseasein...

简介：Aerobicrice(OryzasativaL.)cultivationisconsideredanalternativeproductionsystemtocombatincreasedwaterscarcityandarsenic(As)contaminationinthefoodchain.PotexperimentswereconductedattheWheatResearchCentre,Dinajpur,Bangladeshtoexaminetheroleofwatermanagement(WM),Asandphosphorus(P)onyieldandyieldattributesofboro(varietyBRRIdhan29)andaman(varietyBRRIdhan32)rice.Atotalof18treatmentcombinationsofthethreelevelsofAs(0,20and40mg/kg)andP(0,12.5and25.0mg/kg)andtwoWMstrategies(aerobicandanaerobic)wereinvestigated.YieldattributesweresignificantlyaffectedbyincreasingAslevels.GrainyieldsofBRRIdhan29andBRRIdhan32werereducedfrom63.0to7.7and35.0to16.5g/potwithincreasingAsapplication,respectively,indicatingagreatersensitivityofBRRIdhan29thanBRRIdhan32.Moreover,AstoxicitywasreducedwithaerobiccomparedtoanaerobicWMforallPlevels.Duringearlygrowthstages,phytotoxicsymptomsappearedonBRRIdhan29andBRRIdhan32ricestemswithincreasingAslevelswithoutapplyingPunderanaerobicWM.UnderanaerobicandAs-contaminatedconditions,BRRIdhan29washighlysusceptibletostraighthead,whichdramaticallyreducedgrainyields.Thereweresignificantrelationshipsbetweenthenumberofeffectivetillersperpotandrootdryweight,grainyield,andnumberoffertileandunfertilegrainsperpotforbothBRRIdhan29andBRRIdhan32(P<0.001).OurfindingsindicatethatricecouldbegrownaerobicallyinAs-contaminatedareaswithareducedriskofAstoxicityandyieldloss.