Gastrointestinal nematode egg counts and performance of beef cattle raised on open pastures and silvopastoral systems in
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Gastrointestinal nematode egg counts and performance of beef cattle raised on open pastures and silvopastoral systems in Brazil Luciano Bastos Lopes . Bruno Carneiro Pedreira . Camila Eckstein . Lı´via Loiola dos Santos . Raiane Gosenheimer Peruffo
Received: 14 June 2018 / Accepted: 11 February 2020 Ó Springer Nature B.V. 2020
Abstract 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 L. B. Lopes (&) B. C. Pedreira Embrapa Agrosilvopastoral, Rodovia dos Pioneiros MT222, Km 2,5, Caixa Postal 343, Sinop, Mato Grosso CEP: 78.550-970, Brazil e-mail: [email protected] C. Eckstein Department of Clinics and Surgery, Federal University of Minas Gerais, Av. Pres. Antoˆnio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais CEP: 31270-901, Brazil e-mail: [email protected] L. L. dos Santos Unifaminas, Avenida Cristiano Varella, 655 - Bairro Universita´rio, Muriae´, Minas Gerais CEP: 36.880-000, Brazil e-mail: [email protected] R. G. Peruffo Federal University of Mato Grosso, Campus Sinop. Av. Alexandre Ferronato No 1200; Setor Industrial, Sinop, Mato Grosso, Brazil e-mail: [email protected]
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. Keywords Nellore Helminths Daily weight gain Integrated systems
Introduction Brazilian grass-fed cattle typically spend their entire lives grazing exclusively on grass monoculture pastures, with low or minimal plant diversity, without shaded areas available in most ranches, despite the tropical conditions. Among its multiple benefits,
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Agroforest Syst
livestock-forestry systems have potential to mitigate weather effects like heat stress (Porfirio da Silva
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