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Productivity and nutritional value of BRS capiaçu grass (Pennisetum purpureum) managed at four regrowth ages in a semiarid region

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Abstract

The objective of this study was to evaluate the productivity, productive efficiency, and nutritional value of the elephant grass cultivar BRS capiaçu (Pennisetum purpureum Schum.), managed at four regrowth ages during winter in the semiarid region of northern Minas Gerais, Brazil. A completely randomized design with the elephant grass cultivar BRS capiaçu was submitted to four cut intervals (30, 60, 90, and 120 days) in the winter with ten replications, for a total of 40 plots, each with a useful area of 6 × 5 m. There was a linear increase of 76.25% (P < 0.01) in the height of BRS capiaçu grass when cut from 30 to 120 days. Green matter production (P < 0.01) and dry matter production (P < 0.01) increased daily by 1081 kg/ha and 237 kg/ha, respectively. The annual dry matter production was 72 t/ha. Efficiency in water use changed (P < 0.01) from 7.91 kg of dry matter (DM)/mm at 30 days to 57.59 kg of DM/mm at 120 days of regrowth. There was a reduction in the ash content (P < 0.01), crude protein (P < 0.01), and the total digestible nutrient content (P < 0.01) with the increase in the age of the cut. The readily soluble fraction of DM (fraction A, P < 0.01), degradation rate “c” of insoluble fraction “B” (P = 0.01), potential degradability (PD; P < 0.01), and degradability (ED; P < 0.01) decreased linearly as the regrowth age increased. Harvesting is recommended at 90 days of regrowth during the winter season in this semiarid region.

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Acknowledgments

The authors thank the Foundation for Research Support of the State of Minas Gerais (FAPEMIG), National Council for Scientific and Technological Development (CNPq), the Experimental farm of Unimontes/Janaúba, EMBRAPA - Gado de Leite, and INCT - Ciência Animal.

Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

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Authors and Affiliations

  1. Department of Animal Science and Technology, State University of Montes Claros, Avenue Reinaldo Viana, 2630, Janaúba, Minas Gerais, Brazil

    Flávio Pinto Monção, Marco Aurélio Morais Soares Costa, João Paulo Sampaio Rigueira, Eleuza Clarete Junqueira de Sales, Dijair Barbosa Leal, Marcos Felipe Pereira da Silva, Virgílio Mesquita Gomes, Julieta Maria Alencar Chamone, Dorismar David Alves, Cinara da Cunha Siqueira Carvalho, José Eduardo Jardim Murta & Vicente Ribeiro Rocha Júnior

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  1. Flávio Pinto Monção
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  2. Marco Aurélio Morais Soares Costa
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  11. José Eduardo Jardim Murta
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Correspondence to Flávio Pinto Monção.

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All animal care and handling procedures were approved by the Animal Care and Use Committee of the Universidade Estadual de Montes Claros, Brazil (protocol CEBEA-Unimontes 175/2018).

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Monção, F.P., Costa, M.A.M.S., Rigueira, J.P.S. et al. Productivity and nutritional value of BRS capiaçu grass (Pennisetum purpureum) managed at four regrowth ages in a semiarid region. Trop Anim Health Prod 52, 235–241 (2020). https://doi.org/10.1007/s11250-019-02012-y

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