摘要
以丙烯酸、丙烯酰胺、氨水、尿素、磷酸镁铵和腐殖酸钠等为主要原料,制备了一种既具有缓释性又可吸水保水的双层包膜尿素。对其制备条件进行了优化,得产品含氮量为26.3%,常压下吸自来水95倍;研究了产品在土壤中的吸水保水性和缓释性,推测了其释放过程机理;并通过扫描电镜检测了包膜尿素和膜层的形貌特征。结果表明:试验土壤中加入1%本产品,最大持水率提高14.3%,水分蒸发率明显降低,土壤具有很好的吸水保水性能,养分释放率在一个月内不超过80%。
Using acrylic acid, acrylamide, ammonia, urea, magnesium ammonium phosphate and sodium humate as the main raw materials, a slow-release urea with the function of water-absorption and water-retention was prepared. The synthesis conditions were optimized. The fertilizer contained 26.3% nitrogen and its water absorbency was 95 g/g in tap water. The properties of water-absorption and slow release were studied in soil, and the fertilizer＇s coatings were characterized with SEM. The results showed that the largest water-holding ratio of soil with 1% of the fertilizer was 14.3%, and the water evaporation rate also decreased obviously. The released nutrients were below 80% after one month.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2008年第9期1417-1423,共7页
Chemical Industry and Engineering Progress
