摘要
试验研究了不同施磷水平对土体有效磷含量、土壤养分自然供给力、吸磷特性及小麦产量的影响。结果表明，施用磷肥可明显提高表层土壤有效磷含量；底层土壤有效磷含量变化相对明显；增加了土壤组分对有效磷的吸附固定作用，致使磷的有效性降低，明显促进冬小麦的生长发育，提高小麦产量；同时作物生产力的提高对磷肥施用的依赖性增强。
Theexperimentwascarriedouttostudytheeffectofdifferentlevelsofphosphorusapplicationonrateofsoilavailablephosphorus(SAP),capacityofnaturalnutrientsupply,featureofabsorbingphosphorusandwheatyield.TheresultsshowedthatthephosphorusapplicationcouldincreasetherateofSAPinuppersoillayersignificantly,andtherateofSAPinsubsoillayerchangedremarkably.ThephosphorusapplicationalsopromotedtheabsorptionandfixationofSAP,whichresultedinthedecreasingofutilizationefficiencyofsoilphosphorus.Thewheatyieldwasalsoincreasedduetothephosphorusapplication.Meanwhile,theincreasingofcropproductivitydependgreatlyonthephosphorusapplication.
基金
河北省"九五"科技攻关课题
关键词
土壤有效磷
土壤
小麦
产量
施肥
磷肥
soilavailablephosphorus
capacityofnaturalsupply
absorptionandfixation
