不同养分管理条件下酸化紫色土磷淋溶研究

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1、万方数据AbstractLeachingofPhosphorusfromtheAcidifiedPurpleSoilundertheConditionofDifferentNutrientManagementAdvisor：AssociateProf．ZhangLeiCandidate：WuXianqinDirecfion：SoilScienceABSTRACTPurplesoilaccountsfor69．2％oftheareaofcultivatedland．andtheformofacidificationisbecomingin

2、creasinglyseriousduetheacidrainaswellaslongtermapplicationofchemicalfertilizer．Aciditychangessoilphysicalandchemicalpropertiescomparingwithneutraloralkalinesoilsofthesamegroup．Inordertounderstandtheleachingofphosphorusfromacidifiedpurplesoils，fieldexperimentsinLongwanggo

3、uandpotexperimentsinthegreenhousewereconducted．The蕾esultsofG^西resoaj℃hshowedasfollow：1)TheleachingriskofphosphorusfromacidifiedpurplesoilsWasbiggerundertheconditionofmustardtuber-ricecroprotation(0．019-2．687ug／m1)thanmustardtuber-corncroprotation(0．019--0．289ug／m1)：andth

4、eriskwassignificantlygreaterinriceseason(0。091-2．687ug／m1)thanmaizeseason．itWasgreaterincornseason(0．104～0．289ug／m1)thanmustardtuberseason(O．019-42．239ug／m1)：theleachingriskofphosphoruswassignificantlyhigherunderorganicfertilizertreatmentsinriceseason(0．091～2．687ug／m1)th

5、anchemicalfertilizertreatments(0．180-1．102ug／m1)．Inmustardtuberseason．theleachingconcentrationoftotalphosphorus，particulatephosphorusandorthophosphateunderchemicalfertilizertreatmentswaslowestinthebeginningoftheenlargement，highestinvegetativegrowth；however,theleachingcon

6、centrationofitsdissolvedphosphoruswasinarelativelystablestatefromthebeginningoftheenlargementunderorganicfertilizer(manure)treatments；theleachingriskoftherestofphosphorusformsWasaminimumintumormorphologystemgrowth．InC01season，thepeakleachingconcentrationoftotalphosphorus

7、andparticulatephosphorusunderchemicalfertilizertreatmentsemergedattheelongationandfillingstages，andthatofitsdissolvedphosphorusandorthophosphatewasmainlyat7-8leafstage；butunderorganicfertilizer(manure)treatments，theleachingconcentrationofitstotalphosphorusIII万方数据西南大学硕士学位

8、论文andparticulatephosphoruswasinsmallupsanddownsthroughoutthegrowingperiod，andthepeakleachingconcentrati