高低冷水溶解度改性聚羰基脲缓释性能的研究
Slow release performances of two levels of cold water solubilityof modified poly carbonyl urea
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摘要: 用三异氰酸酯交联改性聚羰基脲，通过土壤培养试验和小油菜盆栽试验，研究了高低不同冷水溶解度改性聚羰基脲（MPCU）的缓释性能。结果表明，改性聚羰基脲具有良好的缓释性能。在土壤培养试验中，高低不同冷水溶解度改性聚羰基脲的氮素释放率在培养90 d 时分别达到71.77% 和47.05%，氮素释放特征分别满足Elovich 方程和一级动力学方程，其拟合度都可达到0.90 以上。施用高低不同冷水溶解度改性聚羰基脲可以有效提高小油菜的产量、养分含量和品质，与普通复合肥相比，产量可分别提高103.95%、71.62%，磷素含量分别提高11.73%、11.07%，钾素含量分别提高22.60%、33.90%，硫素含量分别提高19.53%、5.10%；高冷水溶解度改性聚羰基脲提高氮素含量20.75%、维生素C 含量22.80%。Abstract: A new type of polymeric slow release fertilizer was prepared with poly carbonyl urea andtriisocyanate. By experiments of soil culture and cole pot，the slow release performances of two levels of cold watersolubility of modified poly carbonyl urea（MPCU）were studied. The results showed that the MPCU had good slowrelease performance. The nitrogen release rates of two levels of cold water solubility of MPCU were 71.77% and47.05% in 90 days in soil，the nitrogen release characteristics of two kinds of MPCU in soil could be describedperfectly by the Elovich equation and first-order kinetic equation，both degrees of fitting were more than 0.90.The results of cole pot experiment showed that，compared with common compound fertilizers，the cole yields of twokinds of MPCU increased by 103.95% and 71.62%，phosphorus contents increased by 11.73% and 11.07%，potassiumcontents increased by 22.60% and 33.90%，sulfur contents increased by 19.53% and 5.10%，respectively. Onlyhigh cold water solubility of MPCU made the nitrogen content increased by 20.75% and the content of vitamin Cincreased by 22.80%.
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