白浆土中抑制剂不同浓度组合对尿素态氮的转化作用效果李莉

246201012JournalofSoilandWaterConservationVol.24No.6Dec.,2010　　　:2010-05-22　　:“”(2009BADB3B07,2006BAD10B06,2006BAD10B01);(KSCX2-YW-N-078)　　:(1985-),,,,。E-mail:[e-mail]　　:(1964-),,,,、。E-mail:[e-mail]李莉1,2,李东坡1(1.,110016;2.,100049):,NBPT、DMPP4,。,,NH+4-NNO-3-N,NH+4-N,;0.25%0.5%NBPT10d,14d,0.5%NBPT;80d,54.58%～55.82%,50%,DMPP80d,70d。4,0.5%NBPT+0.5%DMPP,。:NBPT;DMPP;;;:S153.6　　　:A　　　:1009-2242(2010)06-0099-06SynergisticEffectofDifferentConcentrationofUrease/NitrificationInhibitorontheTransformationofUrea-NinAlbicSoilLILi1,2,LIDong-po1(1.InstituteofAppliedEcology,ChineseAcademyofScience,Shenyang110016;2.GruduateSchoolofChineseAcademyofScience,Beijing100039)Abstract:Theexperimentwasconductedunderconstanttemperature,tostudytheeffectsofthecombinationof(n-butyl)thiophosphorictriamideand3,4-DinethylpyrazolphosphatewithdifferentconcentrationsonureanitrogentransformationinalbicsoilinSanjiangPlain,inordertoselectthemostsuitableconcentrationforthealbicsoil.Theresultsshowedthateachcombinationtreatmentoftheinhibitorcaneffectivelyslowdownthehydrolysisofurea,inhibitthetransformationfromNH+4-NtoNO-3-N,maintaintheconcentrationofNH+4-Nahighamountforalongtime,reducethenitratecontent;theeffecttimeofthetreatmentswith0.25%and0.5%NBPTareupto10d,shorterthan14dinblackandbrownsoil.And0.5%NBPTisbet-ter.Onthe80thd,thereisstill54.58%～55.82%ofthenitrogenstayinthesoilintheformofammoniumnitrogen,thenitrificationrateisonlyabout50%,andtheeffecttimeofDMPPisupto80d,longerthan70dinblackandbrownsoil.Thetreatmentwith0.5%NBPT+0.5%DMPPisthebestsuitablecombinationforthealbicsoil.Keywords:(n-butyl)thiophosphorictriamide;3,4-Dinethylpyrazolphosphate;ammoniumnitrogen;nitratenitrogen;ureanitrogen1　引言60%,30%～35%[1],,、,,[2,3]。N-(NBPT),、,NBPT,NBPTO[4,5],。3,4-(DMPP),NH+4NO-2,,NO-3N2O[6-8]。N,[9-11],,,,NH+4,[12],,N。,NBPTDMPP、、,,,,527.2hm2,,,。,,NBPTDMPP,、、。NBPTDMPP,NBPTDMPP,。2　材料与方法2.1　,20099,、,2400～2500h,120～140d,500～650mm。,,,,、、。,2mm,403.9g/kg,1.25g/kg,0.84g/kg,Oslen-P33.4mg/kg,119mg/kg,pH(H2O)5.79。,;N-(NBPT)、3,4-(DMPP),J&K。2.2　,NBPT0.5%,0.25%,DMPP1%,0.5%;1gN/kg。5:(1)+0.5%NBPT+0.5%DMPP(a);(2)+0.5%NBPT+1%DMPP(b);(3)+0.25%NBPT+1%DMPP(c);(4)+0.25%NBPT+0.5%DMPP(d);(5)(urea);3。,700g(2mm),,,,75,5,15,20%,,,25℃。20091217,4,7,10,13,16,19,22,25,28,35,42,49,56,63,70,80d(:,,,),201033,、,,。2.3　,、2mol/LKCl,3-AA3;KCl-,3-AA3Microsoftexcel2003SPSS13.0,。1　3　结果与讨论3.1　,,,。,,,,。4d,100　　　　　24(P0.05),a、b、d,58.38%,63.94%,61.67%,ca、b、d,e,46.52%。10.75%(1),,4d,NBPTDMPP,。c3(1),4d,DMPPNBPT。4d7d,,,(1、2),20℃,,4～5d。7d,0.31%,,a、b3.43%3.11%,c、d2.01%2.92%(1),7d,0.5%NBPT0.25%NBPT。,25℃,3d,3～5d[14],,,,、。7d10d,,10d,,0,,3.00%,,,NBPTDMPP10d,[15,16],。,NBPTDMPP,,0.5%NBPT0.25%NBPT,a0.5%NBPT+0.5%DMPP,0.5%NBPT+1%DMPP,c0.25%NBPT+1%DMPP。,NBPT。2　3.2　NH+4-N,,NH+4;NH+4-NNO-3-N,NH+4-NNO-3-N。NH+4-N,NH+4-N。4d,NH+4-N,(P0.05),75.12%(2),4d,75%,;a、b50.05%49.87%,c、d54.73%54.40%,a、bc、d(P0.05),ab、cd(P0.05),NBPT,,NBPT,,,NH+4-N,NH+4-N,(1)。0.5%NBPT0.25%NBPT,0.5%NBPTNH+4-N,NH3。4d7d,NH+4-N,7d,NH+4-N,,530mg/kg,4d,,a、b56.49%57.00%,c、d39.96%52.65%,2.45%(2),,NBPT+DMPPNBPT,DMPP,。7d,(3)。7d10d,,18.90%～25.43%,d,25.43%,c,18.90%(2),10d,1016　　　　　:,7d。NH+4-N,,NH+4-N,NH3,NH+4-N;,NH+4-N,,[17,18],NH+4,NH+4NO-3,NH+4-N,3NO-3-N。13d,NH+4-N(2),,,DMPP,NH+4-N。13d42d,NH+4-N,NH+4,DMPP,NH+4-N。13d28d,16d,NH+4-N。28d42d,a、cb、d,a。42d,NH+4-N,DMPP,42d80d,49d、63d,;49d,a、dNH+4-Nb、c;63d,aNH+4-N,b、d,cNH+4-N。,,NBPTDMPPNH+4-NNO-3-N,7d,NH+4-N;28d,,35d,a、cb、d,aNH+4-N,42d,a,0.5%NBPT0.5%DMPP,,NH+4-N。b0.5%NBPT+1%DMPP,d0.25%NBPT+0.5%DMPP。,0.5%NBPT+0.5%DMPP4。3.3　NO-3-NNO-3-N,42d,NH+4-N,42d56d,NO-3-N,56d。4d,,20mg/kg,4,,,。4d13d,,,;13d,90mg/kg,,。NO-3-N,。28dNO-3-N,12.92～54.43mg/kg,NBPT+DMPPNH+4-NNO-3-N,;7～13d,NH+4-N,NO-3-N,17.06～33.82mg/kg,NH+4-NNO-2,NO-3-N,NH+4NO-2,NH+4NH3,NH3,,NH3,[18],NH+4-NNO-3-N。13d25d,,25d,404.08mg/kg,,。28d42d,,118.64～179.06mg/kg,,,DMPP,4(2),4,a,c,b,d。49d56d(3),,NO-3N2ON2,。56d80d4(3),92.37～421.55mg/kg,DMPP,,。(2)。63d,,63d,,NBPT+DMPP,63d102　　　　　24,,。DMPP63d。35d42d,aNO-3-N,b、d(P0.05),c;b、d,35d,NBPTDMPP0.5∶10.25∶0.5。,42d,。a,c,bd28d49d;。DMPP,,DMPP。3　3.3　NO-3-N,。,,,。4d25d,16d,4,;4d7d,,NH+4-N,。28d40.5%NB-PT+1%DMPP,3。35d42d,,(3),,35d,a、cb、d,a、c;42d,ab、d,a。49d80d,63d,ab、c、d,,。,DMPP49d。80d,a、b、c、d48.79%,50.33%,49.83%,52.34%,50%,,,,NBPTDMPP,DMPP80d。7～80d,urea,DMPPNH+4-NNO-3-N。,a,c。、,,13d,,NBPT、DMPP,。。16dDMPP,56d,DMPP,4,63d,DMPP,,37%。DMPP,。1　NH+4%/d4710131619222528354249566370800.5%NBPT+0.5%DMPP+U3.60a3.26b5.34b7.45b11.17bc9.31b9.97b8.74b7.59c17.40c20.33d12.88b16.57b31.72d41.27b48.79c0.5%NBPT+1%DMPP+U4.08a3.11b5.42b7.21bc9.86c8.70b9.96b8.57bc9.70b22.22b23.29bc15.02b15.34b37.10b45.34b50.33bc0.25%NBPT+1%DMPP+U3.26a3.08b5.27b6.93bc12.1b8.84b9.49b9.36b7.75c17.73c20.79cd14.38b19.85b37.47b46.64b49.83bc0.25%NBPT+0.5%DMPP+U3.65a3.12b5.47b6.66c8.03d8.51b9.45b7.83c8.00c24.05b23.77b16.39b15.46b34.57c45.86b52.34b3.60a8.60a18.14a18.32a43.13a44.45a46.97a49.96a46.90a44.49a47.35a49.76a49.80a49.04a52.06a58.81a　　:(%)=NO-3-N/(NO-3-N+NH+4-N)×100;(P0.05)。4　结论,NBPTDMPP,,NH+4,NH+4-N28～63d,1036　　　　　:4～28d,28～63d,0.25%0.5%NBPT10d,,7～28d,0.5%NB-PT。80d,54.58%～55.82%,D