脲醛树脂包膜缓释氮肥的制备及缓释性研究

摘要

脲醛树脂可作为缓释氮肥的包膜材料.这种膜是经过缩合聚合过程得到的相对分子质量不同的线性或支链型树脂,具有明显缓释作用.通过浸泡试验,可以得出这种树脂膜的缓释速度,定量地检验出这种膜的缓释效果.%Urea -formaldehyde resin is a kind of nitrogenous This membrane is having different molecular weight and polymerization process. The slow releasing performance slow releasing effect are tested by immersion test. fertilize as a slow releasing performance fertilizers. having linear or branched type through condensation rate of this kind of resin membrane are got and its