Guo Yanle, Shi Yiyun, Zhang Shugang, Hao Zhenping, Zhuang Fengyuan, Zhou Qiaobo, Lu Hao, Cui Qunxiang
College of Horticulture and Landscape Architecture, Jinling Institute of Technology, Nanjing 210038, China.
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China.
ACS Omega. 2024 Oct 17;9(43):43477-43487. doi: 10.1021/acsomega.4c04847. eCollection 2024 Oct 29.
In this study, we optimized the preparation of urea-formaldehyde fertilizer using response surface methodology with a Box-Behnken experimental design. The aim was to maximize the difference between CWIR and HWIR to maximize the content of slow-release insoluble nitrogen. In this work, a model of the impact of reaction factors on CWIR and HWIR was established. Through analysis of variance, the final model was significant. According to this model, the optimal reaction conditions were: a reaction temperature of 42.5 °C, a reaction time of 66.2 min, a U/F of 1.68, and a pH 3.3. Under these optimal conditions, the CWIR and HWIR reached 55.65 and 33.92%, respectively. In addition, the samples were characterized by scanning electron microscopy and thermal stability analysis. This study accurately synthesized urea-formaldehyde products with specific release periods according to production needs in order to improve the efficiency of fertilizer utilization.
在本研究中，我们采用Box-Behnken实验设计的响应面方法优化了脲醛肥料的制备。目的是使冷水不溶物（CWIR）和热水不溶物（HWIR）之间的差异最大化，以提高缓释不溶性氮的含量。在这项工作中，建立了反应因素对CWIR和HWIR影响的模型。通过方差分析，最终模型具有显著性。根据该模型，最佳反应条件为：反应温度42.5℃，反应时间66.2分钟，尿素与甲醛摩尔比（U/F）为1.68，pH值为3.3。在这些最佳条件下，CWIR和HWIR分别达到55.65%和33.92%。此外，通过扫描电子显微镜和热稳定性分析对样品进行了表征。本研究根据生产需要精确合成了具有特定释放期的脲醛产品，以提高肥料利用效率。
