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《尿素添加硝化抑制剂DMPP对稻田土壤不同形态矿质态氮的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2011,30(7):1357一1363J0岫a1ofAgm-Environmemscience尿素添加硝化抑制剂DMPP对稻田土壤不同形态矿质态氮的影响俞巧钢-,一,陈英旭·(1.浙江大学环境与资源学院,杭州310029;2.浙江省农业科学院环境资源与土壤肥料研究所,杭州310021)摘要:采用小粉土和青紫泥两种典型土壤种植水稻,研究尿素添加新型硝化抑制剂3,扯二甲基吡唑磷酸盐(DMPP)对土壤氮素转化及水稻生物学效应的影响。结果表明。水稻田施用含DMPP硝化抑制剂的尿素,与常规尿素处理相比,小粉土和青紫泥土壤中铵态氮浓度分别增加94.6%~97.9%和55.4%~65
2、,l%,硝态氮浓度下降49.O%~81.3%和33.9%一83.7%,亚硝态氮浓度下降46.9%~90.9%和53.7%~90.2%。添加DMPP抑制剂于尿素.小粉土和青紫泥处理水稻的产量增加24.9%和14.2%,生物量增加20.6%和14.4%,吸氮量增加15.3%和22.5%。DMPP抑制剂可有效保持土壤高铵态氮浓度、低硝态氮与亚硝态氮浓度,促进水稻对氮索的吸收利用,提高氮素利用率。关键词:硝化抑制剂;3'4一二甲基吡唑磷酸盐;稻田;氮素转化;尿素中图分类号:)csl43.1文献标志码:A文章编号:1672—2043(2011)07一1357—0r7l搬bctoftheU№a稍th
3、Nitrifi阻ti伽InllibitorDMPPAdmtiononDi仃e心ntFomNitr02enT髓nsfbmationinRiceFieldsYUQiao—gang啦。CHENYiIlg—xul(1.CoUegeofNatu豫lResources帅dEnviro岫entalScience,Zlleji明gUnive璐ity,Hangzhou310029,China;2.InstituteofEnvironment,Re一∞uI{ce,S胡锄dFertili∞r,ZllejiaIlgAcademyofA加culturalsciences,Ha“g小ou31002l,China)A
4、ki昀ct:Inaricepotincuhationexperinlent,tlleeff;ectofnitrogen仃ansfbnnation硼dricegrowtllwer;estIldiedby印pliedur{eawi山newni一谳cati伽illIlibitor3,4一dimetIlylpyr呦lephosphaIe(DMPP)intIlepowder∞il蚰dbluec崎eypaddysoil.ne陀sIlltsshowedtIIat’intllepowder∞il锄dblueckyeypaddy$oil,山e锄啪lliumconcentmti蛐wereincreased9
5、4.6%to97.9%卸d55.4%to65.1%,fIitmtenitmgenconce哺rationswe陀declined49.O%to81.3%粕d33.9%to83.7%,釉dnitritenitrogenconcentmtionsweredeclined46.9%to90.9%锄d53.7%to90.2%,respectively.DMPPco圳stimulatetlIen疵genup诅ke,improvethericeyields24.9%肌d14.2%,i肿re撇bioⅡ啪s砌ount20.6%锄d14.4%,intllepowdersoil粕dblueclayeypad
6、dy∞il,respectively.111enitmgenadsorptionamoumwasal∞increased15.3%and22.5%inthepowder∞il锄dbluec18yeypaddysoil,improvingtIIenitrogenu鸵efficiencyinriceproduction.ThenitrificationirdlibitorDMPPadditionintlIeur;eacoulde&ctivelysustainmeh讪绷moni啪nitmgenconcentration锄dlowllitmte蛐dnitritellitH’genconcentr
7、ationsinthesoil,inc托asetlIenitrogenuptal【ebyrice明dimpmvetIlenitmgenu眈e仿ciency.Keywords:ni谳cationinhibitor;3,4-dimetllyIpyr配olepho印hate;ricefieIds;nitrogenmmsfo册ation;u弛a水体生态环境的恶化,很大程度上归因于农田面源氮磷等营养型污染物【㈦。近年来,我国沿海稻田不·___
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