欢迎来到天天文库
浏览记录
ID:52171441
大小:632.71 KB
页数:4页
时间:2020-03-23
《低甲醛脲醛-石膏-膨润土基玉米缓释肥的制备.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、第36卷第4期非金属矿Vo1.36NO.42013年7月Non.Meta1licMineSJuly,2013低甲醛脲醛一石膏一膨润土基玉米缓释肥的制备李娜邓跃全。董发勤李丽君马春雪(1西南科技大学材料学院,四川绵阳621010;2固体废物处理与资源化省部共建教育部重点实验室,四川绵阳621010)摘要以低甲醛脲醛和石膏的有机.无机复合物为粘结剂,与膨润土复配,形成缓释体系,根据玉米不同生长期对N、P、K的需要,合理配比缓效氮肥(尿素石膏)、速效氮肥(硫酸铵)、磷素肥料或钾素肥料的用量,通过挤压混合反应,振动筛
2、分,圆盘造粒一体化制备技术制备低甲醛脲醛.石膏.膨润土基玉米专用缓释氮肥和缓释复合肥,分别用聚乙烯醇缩甲醛包膜(PVF),获得包膜缓释氮肥和包膜缓释复合肥;利用沙柱连续淋溶法对缓释肥料中N、P、K、S4种养分的释放速率进行了测定,并与常规复合肥对比,结果表明其缓释性能良好。关键词低甲醛脲醛石膏膨N-b-缓释肥玉米中图分类号:TQ449+.1文献标识码:A文章编号:1000—8098(2013)04.0056-04PreparationofUreaFormaldehyde-Gypsum-BentoniteBas
3、edSpecialtySlowreleaseFertilizersforCornLiNa’DengYuequanDongFaqinLiLijunMaChunxue(1SchoolofMaterials,SouthwestUniversityofScienceandTechnology,Mianyang,Sichnan621010;2TheMinistryofEducationKeyLabora—toryofSolidWasteDisposalandResourceBuildedbyProvinceandthe
4、MinistryofEducation,Mianyang,Sichuan621010)AbstractBasedonthecompoundofureaformaldehydeandgypsumasthebinderandcompoundwithbentonite,aslow·releasesystemwasgot,andthereasonableamountofslow—releasenitrogenfertilizer(urea—gypsum),availablenitrogenfertilizer(amm
5、oniumsulfate),phosphorusfertilizerorpotassiumfertilizerwereaddedinaccordingtothedemandforN,Kindifferentgrowthperiodofcorn.Thenthroughtheextrusionmixingreaction,screeningandgranulation,theintegrationpreparationtechnology,ureaformaldehyde—gypsum—bentonitebase
6、dspecialtyslowreleasenitrogenfertilizerandslowreleasecompoundfertilizerfortomwereprepared.Fertilizersobtainedwerecoatedwithpolyyinylformal(PVF)respectively,andcorrespondingcoatedfertilizersweregot.Usingthecontinuousleachingmethod,thereleaseratesofN,P'KandSi
7、nslowreleasefertilizersweredeterminedandwerecomparedwithconventionalcompoundfertilizer,theresultsshowedthattheslowreleasepropertiesofthefertilizerspreparedbytheintegrationpreparationtechnologywerebetter.Keywordsureaformaldehydegypsumbentoniteslowreleasecorn
8、据统计,一般条件下肥料当季利用率中,氮肥为膨润土可用于改良土壤,也可作为载体制备缓释25%~40%,磷肥为10%~25%,钾肥为30%50%,肥。本实验提出一种以低甲醛脲醛-石膏复合材料肥料利用率较低,不仅造成资源浪费,同时污染环境为胶粘剂,与膨润土复配,形成缓释体系,合理配比缓[1-3]o缓/控释肥料能缓慢持久地释放植物生长必需效氮肥素石膏)、速效氮肥(硫酸铵)、磷素肥料或的营养元素,具有利用率高
此文档下载收益归作者所有