CAJ | 학술논문

　　以低甲醛脲醛和石膏的有机-无机复合物为粘结剂，与膨润土复配，形成缓释体系，根据玉米不同生长期对N、P、K的需要，合理配比缓效氮肥（尿素石膏）、速效氮肥（硫酸铵）、磷素肥料或钾素肥料的用量，通过挤压混合反应，振动筛分，圆盘造粒一体化制备技术制备低甲醛脲醛-石膏-膨润土基玉米专用缓释氮肥和缓释复合肥，分别用聚乙烯醇缩甲醛包膜(PVF)，获得包膜缓释氮肥和包膜缓释复合肥；利用沙柱连续淋溶法对缓释肥料中N、P、K、S 4种养分的释放速率进行了测定，并与常规复合肥对比，结果表明其缓释性能良好。
　　이저갑철뇨철화석고적유궤-무궤복합물위점결제，여팽윤토복배，형성완석체계，근거옥미불동생장기대N、P、K적수요，합리배비완효담비（뇨소석고）、속효담비（류산안）、린소비료혹갑소비료적용량，통과제압혼합반응，진동사분，원반조립일체화제비기술제비저갑철뇨철-석고-팽윤토기옥미전용완석담비화완석복합비，분별용취을희순축갑철포막(PVF)，획득포막완석담비화포막완석복합비；이용사주련속림용법대완석비료중N、P、K、S 4충양분적석방속솔진행료측정，병여상규복합비대비，결과표명기완석성능량호。
Based on the compound of urea formaldehyde and gypsum as the binder and compound with bentonite, a slow-release system was got, and the reasonable amount of slow-release nitrogen fertilizer (urea-gypsum), available nitrogen fertilizer (ammonium sulfate), phosphorus fertilizer or potassium fertilizer were added in according to the demand for N, P, K in different growth period of corn. Then through the extrusion mixing reaction, screening and granulation, the integration preparation technology, urea formaldehyde-gypsum-bentonite based specialty slow release nitrogen fertilizer and slow release compound fertilizer for corn were prepared. Fertilizers obtained were coated with polyvinyl formal (PVF) respectively, and corresponding coated fertilizers were got. Using the continuous leaching method, the release rates of N, P, K and S in slow release fertilizers were determined and were compared with conventional compound fertilizer, the results showed that the slow release properties of the fertilizers prepared by the integration preparation technology were better.