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1、中国生态农业学报2009年3月第17卷第2期ChineseJournalofEco-Agriculture,March2009,17(2):273−276DOI:10.3724/SP.J.1011.2009.00273*长期施肥对小麦体内各形态磷含量的影响**田凤娇汪金舫陈军平(中国科学院南京土壤研究所南京210008)摘要利用长期定位施肥试验,研究了不同施肥处理下小麦体内各种形态磷含量的变化。结果表明:不同施−1肥处理的小麦籽粒各形态磷含量均明显高于茎秆。籽粒磷脂态磷含量最高,平均为1.19g·kg,其次为活性−1有机磷、活性无机磷,未知形态磷含量最少,平均为
2、0.348g·kg。茎秆中活性无机磷含量最高,为0.142−1−1g·kg,活性有机磷含量最低,为0.034g·kg。单施有机肥处理小麦茎秆活性有机磷含量显著低于对照及其他处理。除此之外,施磷处理(PK、NP、NPK、OM和1/2OM+1/2NPK)的小麦体内其他各形态磷含量均高于不施磷处理(CK、NK)。与对照相比,单施有机肥能显著增加小麦籽粒各形态磷、全磷和茎秆活性无机磷、未知形态磷、全磷含量;NP处理茎秆有机磷(活性有机磷、磷脂磷)含量显著高于其他处理。不同施肥处理下,小麦籽粒中各形态磷含量与籽粒全磷含量间均呈显著正相关。关键词长期定位施肥磷形态小麦籽粒茎
3、秆中图分类号:S158.3文献标识码:A文章编号:1671-3990(2009)02-0273-04Effectoflong-termfertilizationonthecontentofdifferentformsofphosphorusinwheatTIANFeng-Jiao,WANGJin-Fang,CHENJun-Ping(InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008,China)AbstractBasedonalong-termfertilizationexperiment,
4、theeffectofdifferentfertilizationsonthecontentofdifferentformsofphosphorusinwheatwasinvestigated.Theresultsindicatethatunderdifferenttreatments,thecontentsofdifferentformsofphos-−1phorusinwheatgrainarehigherthanthoseinthestem.Inwheatgrain,lecithoidphosphorusisthehighest(1.19g·kg),fol
5、lowedby−1labileorganicandinorganicphosphorus;whereasthecontentofunknownformsofphosphorusislowest(0.348g·kg).Inthestem,−1−1thecontentoflabileinorganicphosphorusishighest(0.142g·kg)whilethatoflabileorganicphosphorusislowest(0.034g·kg).Thecontentoflabileorganicphosphorusinwheatstemunder
6、organicmanure(OM)treatmentissignificantlylowerthaninthecon-troltreatment.AlsothecontentoftheotherformsofphosphorusishigherunderP(PK,NP,NPK,OM&1/2OM+1/2NPK)treat-mentsthanundernon-P(CK,NK)treatments.Comparedwiththecontroltreatment,thecontentofthedifferentphosphorusformsandtotalphospho
7、rusinwheatgrainandlabileinorganicP,unknownformsofPandtotalphosphorusinstemsincreasessignificantlyunderOMtreatment.Inwheatstem,thecontentoflabileorganicphosphorusandlecithoidphosphorusunderNPtreatmentishigherthanunderothertreatments.Thereisasignificantpositivecorrelationbetweenthediff
8、erentformsof
