Evaluation and Prediction of Nitrogen Use Efficiency and Outputs in Faeces and Urine in Beef Cattle

Abstract

Two experiments were conducted to evaluate reduced supplementation frequencies for grazing beef cattle in rainy season. In experiment 1, evaluating the nutritional parameters, four rumen-cannulated Nellore bulls (BW = 410 kg) were used. In experiment 2, evaluating animal performance, 48 Nellore bulls (BW = 358 kg) were used. The treatments were as follows: mineral supplement (MS) alone and MS plus protein-energy supplement provided 3×, 5× and 7×/week. Supplementation frequency did not affect (P > 0.05) intake and digestibility. Average daily gain was greater (P < 0.001) to supplementation compared with MS. The supplementation 5×/week resulted in greater weight gain per hectare (9.24) and higher economic returns during the study period (1.64%) compared to other supplementations. Supplementation 5×/week increased animal performance and positively influenced economic returns.

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Authors and Affiliations

1. Programa de Pós-Graduação em Ciência Animal, Universidade Federal de Mato Grosso, Cuiabá, Mato Grosso, Brazil

   Renata Pereira da Silva-Marques, Joanis Tilemahos Zervoudakis, Nelcino Francisco De Paula, Luciana Keiko Hatamoto-Zervoudakis & Pedro Ivo José Lopes da Rosa e Silva

2. Faculdade de Medicina Veterinária, Universidade Federal de Mato Grosso, Cuiabá, Mato Grosso, Brazil

   Núbia Bezerra do Nascimento Matos

Corresponding author

Correspondence to Renata Pereira da Silva-Marques.

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The authors declare that they have no conflicts of interest.

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da Silva-Marques, R.P., Zervoudakis, J.T., De Paula, N.F. et al. Effects of protein-energetic supplementation frequency on growth performance and nutritional characteristics of grazing beef cattle. Trop Anim Health Prod 50, 495–501 (2018). https://doi.org/10.1007/s11250-017-1458-6

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• Received: 19 April 2017

• Accepted: 25 October 2017

• Published: 31 October 2017

• Issue Date: March 2018

• DOI : https://doi.org/10.1007/s11250-017-1458-6

Keywords

• Bulls
• Controlled supplementation
• Forage
• Profitability

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Source: https://link.springer.com/article/10.1007/s11250-017-1458-6

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