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1、毕业设计(论文)题目:DMPP对土壤氮素流失和苋菜硝酸盐含量及品质的影响研究目录中文摘要………………………………………………………………………Ⅰ外文摘要……………………………………………………………………………Ⅱ前言…………………………………………………………………………………11.材料与方法………………………………………………………………………2材料……………………………………………………………………………2方法……………………………………………………………………………22.结果与分析……………………………………………
2、…………………………32.1土壤氮素流失的动态变化…………………………………………………32.2土壤氮素流失量变化………………………………………………………42.3苋菜产量及硝酸盐含量影响………………………………………………62.4苋菜营养指标含量…………………………………………………………73.结论与讨论………………………………………………………………………8参考文献……………………………………………………………………………9致谢…………………………………………………………………………………11ⅠⅠDMPP对土壤氮素流
3、失和苋菜硝酸盐含量及品质的影响研究[摘要]采用盆栽试验，研究了尿素添加DMPP（3，4-二甲基吡唑磷酸盐）硝化抑制剂)和尿素添加有机肥和DMPP后对土壤氮素流失及苋菜硝酸盐含量及品质的影响。结果表明，在40d内，与常规尿素和尿素添加有机肥相比，添加DMPP硝化抑制剂的处理可以降低土壤中硝酸盐含量，使硝态氮的累积流失量分别降低61.2%和40.8%，氨氮流失量提高10.6%和11.2%，无机氮降低50.6%和32.5%，减轻氮素向水体迁移的风险；同时添加DMPP硝化抑制剂的处理，能有效控制苋菜中硝酸盐积累，使苋菜硝酸盐含量
4、下降34.9%和22.4%，产量提高37%和8.7%，同时增加苋菜的Vc、氨基酸和可溶性糖等营养成分含量，改善青菜品质。[关键词]DMPP；氮素流失；硝酸盐积累；苋菜品质ⅠⅠⅡEffectofDMPPoninorganicnitrogenleachingloss,nitratecontentandqualityofthree-coloredamaranthStudent:Chenlu,CollegeofAgriculture,YangtzeUniversityTutors:SunZhengxiang,CollegeofA
5、griculture,YangtzeUniversityYuQiaogang,ZhejiangAcademyofAgriculturesciences[Abstract]Apotexperimentwasperformedtostudythenitrogenleachingloss,nitrateandqualityofthree-coloredamaranthbyappliedureawithnewnitrificationinhibitor3,4-dimethylpyrazolephosphate(DMPP)oror
6、ganicfertilizerinpaddysoil.Theresultsshowed,comparedtotheregularureatreatmentandthetreatmentwhichappliedureaandorganicfertilizer,withinthe40daysoftheexperiment,addingDMPPdecreasednitratecontentofsoil,andtheaccumulativeleachinglossesofsoilnitrateintreatmentwithDMP
7、Pdeclined61.2%and40.8%,respectively,.Whiletheaccumulativeleachinglossesofammoniumnitrogenincreased10.6%and11.2%,respectively.Theaccumulativeleachinglossesofinorganicnitrogenreduced50.6%and32.5%,respectively.Nitratecontentofthree-coloredamaranthinaddingDMPPtreatme
8、ntreduced34.9%and22.4%,respectively.Yieldincreased37%and8.7%,respectively.WhileaddingDMPPcouldimprovethecontentsofVc,aminoacidsandsolublesugar.Thus,DMPPcouldef
