Key Laboratory of Soil Resource Sustainable Utilization for Jilin Province Commodity Grain Bases, College of Resources and Environmental Science, Jilin Agricultural University, Changchun 130118, China.
Key Laboratory of Soil Resource Sustainable Utilization for Jilin Province Commodity Grain Bases, College of Resources and Environmental Science, Jilin Agricultural University, Changchun 130118, China.
Sci Total Environ. 2020 Feb 20;704:135394. doi: 10.1016/j.scitotenv.2019.135394. Epub 2019 Nov 21.
As a commonly used nitrification inhibitor, nitrapyrin can significantly improve the utilization of nitrogen in soils. However, the effectiveness of the traditional dosage form of nitrapyrin is reduced by soil adsorption. In this study, nitrapyrin was encapsulated into a melamine-formaldehyde resin microcapsule with good dispersion and release behavior using an in situ polymerization method. The nitrapyrin microcapsules were characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, and particle-size analysis. The results indicated that the microcapsules had a spherical-shell structure, a uniform morphology with nanoscale micropores on the surface, and a decent nitrapyrin loading content (67.19%). Tests revealed that the release behavior of the nitrapyrin microcapsules was outstanding and conformed to the double-release kinetic model. These results of this study indicate that the nitrapyrin microcapsules can be applied as nitrification inhibitors with beneficial environmental effects and high efficacy.
作为一种常用的硝化抑制剂，硝呋吡嗪能显著提高土壤中氮的利用率。然而，硝呋吡嗪的传统剂型由于土壤吸附而降低了效果。本研究采用原位聚合法将硝呋吡嗪包封到具有良好分散性和释放性能的三聚氰胺-甲醛树脂微胶囊中。采用傅里叶变换红外光谱、热重分析、扫描电子显微镜、透射电子显微镜和粒径分析对硝呋吡嗪微胶囊进行了表征。结果表明，微胶囊具有球形壳结构，形态均匀，表面具有纳米级微孔，硝呋吡嗪的负载量较高（67.19%）。试验表明，硝呋吡嗪微胶囊的释放行为优异，符合双释放动力学模型。本研究结果表明，硝呋吡嗪微胶囊可用作具有良好环境效应和高效的硝化抑制剂。
