This study aimed to assess the productive performance and economic viability of intact, surgically castrated, and immunocastrated cattle. The experiment was completely randomized with 102 animals divided into three treatments: intact (control group), surgically castrated (group I), and immunocastrated (group II). Animal production indices, circulating testosterone levels, carcass yield and finishing, and profit generated by each method after slaughter were determined. Control group and immunocastrated animals showed a higher (p<0.05) total weight gain (TWG) than surgically castrated animals, with means of 181.85, 170.34, and 148.88 kg, respectively. Average daily weight gain (ADG) in immunocastrated was higher (p<0.05) than that obtained by surgically castrated, not differing (p<0.05) from intact animals, with means of 0.534, 0.466, and 0.570 kg/animal, respectively. The assessment of the degree of finishing showed that surgically castrated animals had an adequate fat deposition (three to six millimeters) and maturity. On the other hand, immunocastrated animals presented 50.0% of carcasses with tolerable classification, 36.11% desirable, and 13.89% undesirable. Control animals had a higher testosterone concentration than the other groups (p<0.05), with a mean of 128.56 ng/dL. Immunocastrated animals had a 60.91% reduction in testosterone concentration compared to control animals. However, these were significantly higher (p<0.05) than surgically castrated animals, which had a mean concentration of 12.34 ng/dL, representing a reduction of 90.4% in comparison with control animals. Therefore, immunocastration reduced the damages caused by surgical castration and qualitatively improved the carcass of Nellore animals, thus joining animal welfare and production. However, intact animals showed higher profitability.

本研究旨在评估完整、手术阉割和免疫阉割的牛的生产性能和经济可行性。该实验完全随机化，102 只动物分为三个治疗组：完整（对照组）、手术去势（I 组）和免疫去势（II 组）。测定了动物生产指数、循环睾酮水平、屠体产量和肥育以及每种方法屠宰后产生的利润。对照组和免疫阉割动物的总体重增加 (TWG) 高于手术阉割动物 (p<0.05)，平均值分别为 181.85、170.34 和 148.88 kg。免疫阉割的平均每日体重增加 (ADG) 比手术阉割的高 (p<0.05)，与完整动物没有区别 (p<0.05)，平均值为 0.534、0.466 和 0。分别为 570 公斤/动物。完成程度的评估表明，手术阉割的动物有足够的脂肪沉积（3 到 6 毫米）和成熟度。另一方面，免疫阉割的动物有 50.0% 的尸体具有可容忍的分类，36.11% 是可取的，13.89% 是不可取的。对照动物的睾酮浓度高于其他组 (p<0.05)，平均值为 128.56 ng/dL。与对照动物相比，免疫阉割动物的睾酮浓度降低了 60.91%。然而，这些显着高于（p<0.05）手术阉割的动物，其平均浓度为 12.34 ng/dL，与对照动物相比降低了 90.4%。所以，免疫阉割减少了手术阉割造成的损害，从质量上改善了内洛尔动物的尸体，从而加入了动物福利和生产。然而，完整的动物显示出更高的盈利能力。