The investigation aimed to evaluate the use of micronutrients Zn, B, and the urease inhibitor (N-(n-butyl) thiophosphoric triamide) (NBPT), associated with an organic polymer to reduce ammonia losses (N-NH₃) and increase maize yield. Two experiments were conducted under field conditions in Luminárias and Ingaí, Minas Gerais, Brazil. The treatments consisted of the application of prilled urea, urea coated by an organic polymer, polymer + zinc (Zn), and boron (B) or NBPT, which are urease inhibitors in the soil, and a control treatment without N application. The reduction of N-NH₃ losses applying the studied sources ranged between 0.2 and 42% on average. Leaf N concentration at flowering varied between 21 and 27 g kg⁻¹, Zn concentration varied between 34 and 38 mg kg⁻¹, and grain yield ranged from 3403 to 4810 kg ha⁻¹. Grain yield increased by 15% on average compared to the control treatment. The addition of the organic polymer alone to urea reduces N losses by volatilization compared to prilled urea. However, when associated with Zn and B additions, this approach becomes more effective. The NBPT (N-(n-butyl) thiophosphoric triamide) concentrations used in this study exhibited low efficiencies in reducing N losses by volatilization. The application of Zn and B with the organic polymer affected nutrient uptake at the maize flowering stage but was not enough to increase maize yield. The removal of Zn and B by the grains was enhanced by the addition of these micronutrients to the organic polymer coating, regardless of the Zn source.

该研究旨在评估微量营养元素Zn，B和脲酶抑制剂（N-（正丁基）硫代磷酸三酰胺）（NBPT）与有机聚合物的结合使用，以减少氨气损失（N-NH ₃）和增加玉米屈服。在巴西米纳斯吉拉斯州的卢米纳里亚斯（Luminárias）和因加（Ingaí）的野外条件下进行了两个实验。这些处理包括在土壤中施用造粒尿素，被有机聚合物，聚合物+锌（Zn）和硼（B）或NBPT覆盖的尿素，它们是土壤中的脲酶抑制剂，以及不施氮的对照处理。使用研究的源减少的N-NH ₃损失平均在0.2％到42％之间。开花时叶片氮含量在21至27 g kg ^-1之间变化，锌浓度在34至38 mg kg ^-1之间变化，谷物产量在3403至4810 kg ha ^-1之间。与对照处理相比，谷物平均产量提高了15％。与粒状尿素相比，将有机聚合物单独添加到尿素中可通过挥发减少氮的损失。但是，当与Zn和B的添加相关联时，此方法会更有效。在这项研究中使用的NBPT（N-（正丁基）硫代磷酸三酰胺）浓度在降低挥发引起的N损失方面显示出较低的效率。锌和硼与有机聚合物一起施用会影响玉米开花期的养分吸收，但不足以增加玉米产量。通过将这些微量营养素添加到有机聚合物涂层中，无论锌的来源如何，都可以提高谷物中锌和硼的去除率。