pH值对缓释性钾肥溶出性能的影响研究(英文)  

STUDY OF pH VALUE EFFECT ON THE SOLUBILITY OF SLOW RELEASE POTASSIUM

作　　者：贺祯[1] 殷海荣[1] 王薇[1] 刘新年[1] 田鹏[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2010年第4期1-4,共4页Journal of Shaanxi University of Science & Technology

基　　金：西安市未央区科技计划项目(200020)

摘　　要：以矿渣及K2CO3为原料,采用烧结法制备了K2O-RO-SiO2(R=Ca,Mg)系统玻璃缓释性钾肥,利用原子吸收光谱分析检测了不同pH值下所制备缓释性钾肥中K+、Mg2+的溶出量.结果表明,所制备缓释性钾肥中的K+、Mg2+在柠檬酸溶液中溶解分别为95%和70%,在柠檬酸铵溶液中溶解分别为86%和40%,在0.5 N盐酸,pH=2的柠檬酸和pH=4.5的柠檬酸铵中的溶解程度大小顺序依次为:盐酸>柠檬酸>柠檬酸铵,说明肥料呈碱性.K2O-RO-SiO2（R=Ca,Mg） based glass slow release potassium were prepared by sintering method using mineral slag and K2CO3 as raw materials.The dissolution quantities of the K^ ＋ and Mg^2＋ in the glass-based potassium are investigated by Atomic Absorption Spectroscopy at different pH values.The results show that the dissolution fractions of K^ ＋ and Mg ^2＋ are 95% and 70% in the citric acid solution,and dissolved 86% and 40% in ammonium citrate solution respectively.In 0.5 N hydrochloric acid,citric acid with pH value of 2,and ammonium citrate solution with pH value of 4.5,the dissolution rates follow the sequence： hydrochloric acid〉citrate〉ammonium citrate.

关 键 词：缓释性肥料 钾肥 矿渣 

分 类 号：S14[农业科学—肥料学]