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Nutritional evaluation of “Braquiarão” grass in association with “Aroeira” trees in a silvopastoral system

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Abstract

This study aimed at evaluating the influence of a silvopastoral system (SPS) composed of “Aroeira” trees (Myracrodruon urundeuva) on the nutritional value of Brachiaria brizantha cv. Marandu forage grass over the rainy season. The experiment was conducted in the SPS located in the “Cerrado” biome in Lagoa Santa County, Minas Gerais state, Brazil, in the agricultural year of 2004–2005. It was evaluated the influence of “Aroeira”, whose density in the area was 140 trees/ha, on the following parameters of the B. brizantha cv. Marandu forage grass: forage mass harvest above stubble height, morphogenic attributes, bromatological composition and nutritional value. The effects of “Aroeira” trees on the micro-climatic conditions were also evaluated. The experiment adopted a randomized block design with five blocks (cutting seasons), two treatments (a shaded pasture—B. brizantha cv. Marandu shaded by M. urundeuva—and a pasture in full sun—B. brizantha cv. Marandu in full sun), and three replicates. The tree component, composed of the tree species M. urundeuva in the experimental density adopted, increased dry matter and crude protein of the forage mass harvest above stubble height, without affecting the concentration of neutral detergent fibre or acid detergent fibre, thus causing dry matter and organic matter in vitro degradability as well as effective degradability of the forage grass to remain the same as those obtained in full sun. Therefore, the results of this study show the possibility of using trees and grass to increase both animal production and environmental services.

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Acknowledgments

The authors wish to thank CAPES for granting the graduate fellowship, Dr Yolanda Viana for kindly lending her property for research, and Helvia Faria for important English help.

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Authors and Affiliations

  1. Federal University of Tocantins, Veterinary School, Rodovia Br 153, Km 390, CEP 77800-000, Araguaína, Tocantins, Brazil

    Luciano Fernandes Sousa

  2. Federal University of São João Del Rey, Praça Frei Orlando, no 170, CEP 36307-352, São João Del Rei, Minas Gerais, Brazil

    Rogério Martins Maurício

  3. Federal University of Minas Gerais, Veterinary Schooll, Av. Presidente Antônio Carlos no 6627, CP 567, CEP 30123-970, Belo Horizonte, Minas Gerais, Brazil

    Guilherme Rocha Moreira, Lúcio Carlos Gonçalves & Iran Borges

  4. Embrapa Gado de leite, Rua Eugênio do Nascimento, no 610, CEP 36038-330, Juiz de Fora, Minas Gerais, Brazil

    Luiz Gustavo Ribeiro Pereira

Authors
  1. Luciano Fernandes Sousa
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  2. Rogério Martins Maurício
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  3. Guilherme Rocha Moreira
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  4. Lúcio Carlos Gonçalves
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  5. Iran Borges
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  6. Luiz Gustavo Ribeiro Pereira
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Correspondence to Luciano Fernandes Sousa.

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Sousa, L.F., Maurício, R.M., Moreira, G.R. et al. Nutritional evaluation of “Braquiarão” grass in association with “Aroeira” trees in a silvopastoral system. Agroforest Syst 79, 189–199 (2010). https://doi.org/10.1007/s10457-010-9297-8

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