木质素包膜尿素(LCU)的研制及其肥效试验

利用工业木质素作为包膜材料对颗粒尿素进行包膜处理，制成一系列缓释尿素，并开展了玉米和菜心盆栽肥效试验。结果表明，在等养分与等重量施肥情况下，木质素包膜尿素处理的玉米和菜心生物量均高于普通尿素，而且施用木质素包膜尿素处理的两茬累积氮肥利用率也高于普通尿素处理，最高的氮肥利用率比普通尿素提高了12．49％。

Preparation of Urea Coated with Lignin (LCU) and Its Fertilizer Efficiency Test

Series coated urea with lignin in di fferent layer thickness was made up i n rotating drumcoating machine.Apot experiment was conducted to study the fertilize r efficiency of LCU used as a slow -release nitrogen fertilizer on corn and flowering Chinese cabbage.The result of the equal nutr ition and equal weight of fertilizer pot experiment indicated that LCUcould strikingly increase the biomass and utilization ratio of nitrogen of the pot corn and flowering Chinese cabbage.Compared with un -coa ted normal urea,the largest accumulative utilization r atio of nitrogen of two batches was in creased by 12.49%.LCUis a kind of eff ective slow -releasing fertilizer,it can perform the both f unctions of enhancing the utilization ratio of nitrogen and protecting e co -environment.