晚稻种衣肥的制备及理化性能

Preparation and Physicochemical Properties of Late Rice Seed-coating Fertilizer

为了获得晚稻种衣肥的制备条件,明确其理化性质,考察了肥料用量、膜料用量、种子负载率、包衣方式、烘烤时间等单因素对晚稻种衣肥制备效果的影响,用正交试验L9(3)进一步明确了晚稻种衣肥制备的最佳条件;并对该条件下制备的晚稻种衣肥进行了理化性能检测。晚稻种衣肥的最佳制备条件为:肥料用量10%,膜料用量0.1%,种子负载率50%,包衣方式为0.5A-B-0.5A,烘烤时间20 min。理化性能为:pH 6.77、粘度值20.7 m Pa/s、成膜性中等、成膜时间9.3 min、包衣均匀度为95.0%、包衣脱落率为8.9%、丸衣水中裂开时间6.0 min,表明制备的晚稻种衣肥理化性质良好。

To obtain preparation conditions and explore physicochemical properties of late rice seed-coatingfertilizer, single factor effects of application amount, coating agent amount, seed load rate, coating method anddrying time on the preparation of late rice seed-coating fertilizer were studied, and the optimal preparationcondition was determined by orthogonal test L9（3）, the physicochemical properties of fertilizer under theoptimal condition were measured. The results showed that the optimal preparation condition was as follows： theapplication amount was 10%, coating agent amount was 0.1%, seed load rate was 50%, coating method was0.5 A-B-0.5 A and the drying time was 20 min. Test results of physicochemical properties showed that： pHvalue was 6.77, viscosity was 20.7 m Pa/s, the film-forming property was middle, the film-forming time was9.3 min, coating uniformity was 95.0%, coating-off rate was 8.9%, split time in water of coating was 6.0 min,which indicated that the coating-agent for late rice seed-coating fertilizer had good physicochemical properties.