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将尿素和聚磷酸铵包埋于魔芋葡甘露聚糖中作为肥料内核,以聚乙烯醇/甲基纤维素共混物作为内层包膜材料,以魔芋葡甘露聚糖-g-聚(N-(2-羟丙基)甲基丙烯酰胺-co-2-丙烯酰胺-2-甲基丙烷磺酸)[KGM-g-P(HPMAm-coAMPS)]保水剂作为外层包膜材料,制备了一种具有吸水保水功能的包膜型缓释复合肥料。该双层包膜肥料中N和P含量为18.4%和8.9%,具有较好的养分缓释性能。
Urea and ammonium polyphosphate were embedded in konjac glucomannan as fertilizer core, polyvinyl alcohol / methyl cellulose blend as the inner coating material, konjac glucomannan-g-poly (N - (2-hydroxypropyl) methacrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) [KGM-gP (HPMAm-coAMPS)] water-retaining agent as an outer coating material, With the function of water-absorbing coating of slow release compound fertilizer. The N and P content of the double-coated fertilizer is 18.4% and 8.9%, and has good nutrient release-releasing properties.