Mg2对膨润土载体缓释肥缓释效果的影响徐俊虎

襍襊、。5%MgCl215%MgCO3MgCl2MgCO3。Mg2+。Mg2+TQ422/TQ449.1X786A1674-0912201605-0036-05Mg2+Mg2+1989-。10%。。25%~40%10%~25%30%~50%[1~3]。、。2070/SRFS/CRFS[4]。、、。、MgCl2MgCO3。11.11.1.1。[56]、、、1。1.1.2200150g1000mL800mL0.5h10min。、10min3600r/min105℃200。1。1200150g1g/100g34.02mL/1g4.90mL/15g35.0mmoL/100g63.536襍2016/9/5襊1.1.36∶415%TDP-1.5[78]。2。1.2HK-08ATDL-5-A722Byes100TDL-5-AFA1004B。1.31.3.1[9]。1.3.2250mL100mL25g25℃。15d。3。550mL32250g2mm25g。1/min150mL2d。20d10。3。22.1P3%4%5%6%MgCl215d20dMgCl2。、。3“L”。1d15d3%4%5%6%24.88%23.87%22.57%22.14%21.63%48.55%41.34%37.17%32.43%27.35%。431103%4%5%6%21.77%20.78%19.65%19.22%18.59%44.18%37.73%32.86%28.15%24.07%。125℃1d、24.88%21.63%15d、48.55%27.35%。15dP。21、21.77%18.59%10、44.18%24.07%3%~4%。2Mg2+37襍襊Mg2+NH4+PO4-MgNH4PO4·6H2O。P。5%。2.2P5%10%15%20%MgCO315d20dMgCO3。、。5“L”。1d15d5%10%15%20%20.58%17.77%16.83%15.29%31.24%27.45%26.62%23.65%。651105%10%15%20%18.77%15.90%14.74%13.38%29.66%25.87%24.03%21.76%。125℃1d、20.58%15.29%15d、31.24%23.65%。P。21、18.77%13.38%10、29.66%21.76%2%。/4504540353025201510/%123456789103%MgCl24%MgCl25%MgCl26%MgCl2325℃504540353025201510/%1234567153%MgCl24%MgCl25%MgCl26%MgCl225℃/d525℃3530252015105/%1234567155%25℃/d10%15%20%Mg2+38襍2016/9/5襊63530252015105/%5%10%15%20%/123456789107Mg2+MgNH4PO4Mg2+。Mg2+NH4+PO4-MgNH4PO4·6H2O。P。15%。2.3。P。7。。24h。。。。Mg2+。NH4+HPO42-Mg2+2.5×10-13Mg2++NH4++HPO42-+OH-+6H2OMgNH4PO4·6H2O+H2O。NH4+HPO42-Mg2+Mg2+Mg2+。31MgCl2Mg2+39襍襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊襊Studyontheactionofmagnesiumioninslow-releasefertilizerwithcarrierofbentoniteXUJunhu,WANGYanhui,SUHongyu,LUJing,PANGBingyingChinaUrbanConstructionDesign&ResearchInstitute,Beijing100120,ChinaAbstract:Asthecarrierofammoniumdihydrogenphosphatefertilizer,naturalporousmineralbentonitewasmixedwithsomeurea-formaldehyderesinandmagnesiumsaltaccordingtoacertainration.Withthehelpofelectricpressuremachine,theslowreleasefertilizerwaswellmade.Throughthemethodofwaterdissolutionrateandthesandcolumnleachingsolution,theresearchhadfoundthatthedosageofmagnesiumcarbonateismore,theeffectofthenutrientreleaseofthepreparedslowreleasefertilizertabletsisbetter.Andtheslow-releaseeffectofsustainedreleasetabletswasbest,whenthedosageofmagnesiumchlorideandmagnesiumcarbonatewere5%and15%.Slow-releaseeffectisnotsignificantwhenthedosageofmagnesiumsaltincreasemore.Asmagnesiumchlorideissolublesaltsanditssolubilityinwaterisbig,itwillreleaseasmallamountofmagnesiumion,reactionwithammoniumionandphosphateofthematrixoftheslowreleasefertilizertoformasmallamountofstruvite,whichhaveenhancedtheslow-releaseeffect.Keywords:Mg2+;bentonite;slowreleasefertilizer;releasemechanism2016－04－11MgCl25%。2MgCO3。MgCO3MgCl2Mg2+。MgCO315%。3Mg2+NH4+PO4-P。P。Mg2+。《》。《》。、。“”、。“”、。、、。40