摘要
为了探明复合型缓释肥包衣剂的理化性质及其缓释特性,对复合型缓释肥包衣剂的粘度、成膜性、成膜时间、膜韧性、包衣脱落率、包衣肥的养分初期溶出率、养分微分溶出率、养分累积释放曲线等进行了测定。理化性质测试结果显示:缓释肥包衣剂的粘度为44.5MPa/s、成膜性良好、成膜时间7min、包衣膜拉长倍数达2.8倍,包衣脱落率<5%。缓释特性测试结果显示:包衣肥养分N、P、K初期溶解率<15%、微分溶解率<2%,符合中国缓释肥料标准GB/T23348—2009。其中P的初期溶解率小于N、K的初期溶解率,而N、P、K微分溶解率相差不大。养分累积释放曲线大致呈"S"型,与作物生长需肥规律一致。表明复合型缓释肥包衣剂的理化性质良好,能有效控制普通复合肥养分的缓释。
To explore the physical and chemical properties and slow-release properties of compound coating-agent for slow-release fertilizer （KSFF-2）, the viscosity, forming film property, forming film time, film tenacity, coating off rates of coating agent, and the nutrient initial-release ratios, nutrient micro-release ratios and nutrient accumulation-release curves of coating slow-release fertilizer were determined. Results showed that the viscosity of the compound coating-agent was 44.5 MPa/s, forming film property was better, forming film time was 7 min, film stretch ratio was 2.8 times, coating off rates was less than 5%. The initial release ratio of N, P, K in the coated fertilizer was less than 15%, the micro release ratio was less than 2%, which was consistent with the slow-release fertilizer standard GB/T 23348-2009 constituted by China. The initial dissolution rate of P was less than those of N and K, and the micro release ratio of N, P, K was almost the same. The nutrient accumulation-release curves were S-shape, which was consistent with the nutrient demand of crops. These results indicated the physical and chemical properties of compound coating-agent forslow-release fertilizer were good, and it could effectively control the slow-release of nutrients of general compound fertilizer.
出处
《中国农学通报》
CSCD
北大核心
2011年第33期85-89,共5页
Chinese Agricultural Science Bulletin
基金
国家"863"项目"纳米肥料关键技术研究"(2001AA218041)
湖南省科技厅计划项目"肥料控释包衣剂的创制及控释性能研究"(2010FJ6022)
关键词
肥料
缓/控释肥
缓释肥包衣剂
复合型包衣剂
理化性质
缓释特性
fertilizer
slow/controlled release fertilizer
coating-agent for slow-release fertilizer
compound coating-agent
physical and chemical properties
slow-release properties
