Recently, the use of polymers in agricultural and horticultural applications has been seen as a solution to reduce water consumption and excess fertilizer use in particularly. In this study, macrogels were synthesized to allow fertilizer species and water to be controlled and released in the soil. A natural macrogel derived from N,N-Dimethylacrylamide (DMAAm), Maleic Acid (MA) and Citric Acid (CA) was selected because of its ability to absorb/release a large amount of water and to have modifiable functional groups. Urea, which is an abundant source of nitrogen, was chosen to model the fertilizer. The macrogel was prepared using easily available, low-cost, modifiable starting materials by redox polymerization technique. p(DMAAm-co-MA-co-CA) (DMC₁) surface was modified by hydrochloric acid (HCl) and sodium hydroxide (NaOH) to obtain p(DMAAm-co-MA-co-CA)/HCl (DMC₂) and p(DMAAm-co-MA-co-CA)/NaOH (DMC₃), which have positively and negatively charged, respectively. After being analyzed for intermolecular interactions (Fourier-Transform Infrared Spectroscopy,FT-IR) and thermal properties (Thermogravimetric Analysis,TGA), the macrogels were tested in terms of sorption isotherms and thermodynamic parameters. However, in order to examine the urea release mechanism, the macrogels were tested using four release models such as Zero Order Kinetic Model(Z-O), First Order Kinetic Model(F-O), Higuchi(H) and the Korsmeyer-Peppas(K-P) power law. Cumulative urea release values for DMC₁, DMC₂ and DMC₃ macrogels were calculated as 100% at pH 4 and 10, 100% at pH 6, 8 and 10, 100% at pH 4, 6, 8 and 10, respectively. Analyzes confirmed that synthesized macrogels can be good water holder for soil and can be a slow release of urea.

近来，在农业和园艺应用中使用聚合物已被视为特别是减少水消耗和过量肥料使用的解决方案。在这项研究中，合成了大分子凝胶，以控制肥料种类和水并在土壤中释放。选择了一种天然的大分子凝胶，其衍生自N，N-二甲基丙烯酰胺（DMAAm），马来酸（MA）和柠檬酸（CA），因为它具有吸收/释放大量水并具有可修饰官能团的能力。选择了尿素作为氮肥的丰富氮源，氮是氮的丰富来源。大分子凝胶是通过氧化还原聚合技术使用易于获得，低成本，可修饰的起始原料制备的。p（DMAAm-co-MA-co-CA）（DMC ₁）表面用盐酸（HCl）和氢氧化钠（NaOH）改性，得到p（DMAAm-co-MA-co-CA）/ HCl（DMC ₂）和p（DMAAm-co-MA-co-CA）/分别带正电和负电的NaOH（DMC ₃）。在分析了分子间的相互作用（傅里叶变换红外光谱，FT-IR）和热性能（热重分析，TGA）后，对大凝胶进行了吸附等温线和热力学参数方面的测试。但是，为了检查尿素的释放机理，使用四种释放模型（例如零级动力学模型（ZO），一级动力学模型（FO），Higuchi（H）和Korsmeyer-Peppas（KP）功率）对大凝胶进行了测试。法律。DMC ₁和DMC _2的累积尿素释放值和DMC _3大凝胶分别在pH 4和10时为100％，在pH 6、8和10时为100％，在pH 4、6、8和10时为100％。分析证实，合成的大凝胶可以很好地保持土壤水分，并且可以缓慢释放尿素。