Compared to conventional cattle ranching that can be characterized by low biodiversity level and grass monoculture adoption, integrated systems have great potential to improve not only animal welfare but also livestock performance. Among several strategies combining crops, livestock and forestry, silvopastoral systems must be highlighted due to the microclimatic conditions, mainly in tropical countries such as Brazil, where cattle are frequently submitted to unfavorable thermal conditions. However, according to previous studies, shading can potentially worsen parasitism in herds raised in these systems due to more favorable microenvironmental conditions. This study aimed to evaluate daily weight gain in Nellore steers in open pasture and in silvopastoral system and its relationship with microclimatic conditions and faecal egg count. A negative correlation (− 0.42677) between nematode egg counts and daily weight gain was found in both systems. Besides, the mean egg counts were equal in the silvopastoral system and in the open pasture. Regarding the effect of seasons over the year, there was an environmental influence on the egg counts, with higher averages during the dry seasons. Haemonchus, Cooperia, and Oesophagostomum were the genera identified in both systems. Based on the results, it can be concluded that the silvopastoral system was not able to influence the nematode egg counts and daily weight gain in Nellore steers raised in Mato Grosso.

中文翻译：

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巴西露天牧场和林牧系统饲养的肉牛的胃肠道线虫卵计数和性能

与生物多样性水平低和采用草单一栽培的传统养牛场相比，综合系统具有巨大的潜力，不仅可以改善动物福利，还可以改善牲畜性能。在结合作物、畜牧业和林业的几种战略中，由于小气候条件，林牧系统必须得到重视，主要是在巴西等热带国家，那里的牛经常面临不利的热条件。然而，根据之前的研究，由于更有利的微环境条件，遮荫可能会加剧在这些系统中饲养的畜群的寄生。本研究旨在评估开放牧场和林牧系统中 Nellore 公牛的每日增重及其与小气候条件和粪便卵数的关系。在两个系统中都发现线虫卵计数与每日体重增加之间呈负相关 (- 0.42677)。此外，林牧系统和开放牧场的平均鸡蛋计数相等。关于一年中的季节影响，环境对鸡蛋数量的影响较大，旱季的平均值较高。Haemonchus、Cooperia 和 Oesophagostomum 是在这两个系统中确定的属。根据结果​​，可以得出结论，林牧系统无法影响马托格罗索州饲养的内洛尔公牛的线虫卵数和日增重。鸡蛋数量受到环境影响，旱季的平均值更高。Haemonchus、Cooperia 和 Oesophagostomum 是在这两个系统中确定的属。根据结果​​，可以得出结论，林牧系统无法影响马托格罗索州饲养的内洛尔公牛的线虫卵数和日增重。鸡蛋数量受到环境影响，旱季的平均值更高。Haemonchus、Cooperia 和 Oesophagostomum 是在这两个系统中确定的属。根据结果​​，可以得出结论，林牧系统无法影响马托格罗索州饲养的内洛尔公牛的线虫卵数和日增重。