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Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing Ciência Rural
Barbieri,Cezar Wankura; Quadros,Fernando Luiz Ferreira de; Jochims,Felipe; Kuinchtner,Bruno Castro; Carvalho,Thiago Henrique Nicola de; Casanova,Pedro Trindade; Fernandes,Augusto Miranda; Pereira,João Bento.
It was evaluated the effect of two rest intervals between grazing occupations in rotational grazing; 375 and 750 DD (degree-days); based on the cumulative thermal sum necessary for leaf expansion of native grasses of two functional groups over the grazing behavior variables from beef heifers with 12 months old. The experiment was conducted as a completely randomized block design, with two treatments, three replications and measures repeated over time. Grazing behavior was assessed in three occasions (Nov 2011, Jan and Mar 2012), with 24h each. The herbage intake was estimated using an external marker (Cr2O3). The leaf mass was similar among the rest intervals, with a mean of 1261kg DM ha-1. The average grazing time was 627.4min day-1 and bite rate was 37.1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bite rate; Degree-day; Grazing time; Sward structure; Thermal-sum.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056
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Beef heifers performance in natural grassland under continuous and rotational grazing in the autumn-winter Ciência Rural
Soares,Émerson Mendes; Quadros,Fernando Luiz Ferreira de; Carvalho,Régis Maximiliano Roos de; Oliveira,Leandro Bittencourt de; Jochims,Felipe; Dutra,Gabriela Machado; Fernandes,Augusto Miranda; Trindade,José Pedro Pereira; Ilha,Gustavo Freitas.
The aim of this study was to evaluate the performance of beef heifers in natural grassland under continuous and rotational grazing during the autumn-winter period. The treatments were distributed in a completely randomized design and conducted using the forage mass above eight cm and 50% of the leaf blades mass of tussocks. The animals were Brangus beef heifers with initial body weight of 258kg. The variables evaluated were available forage mass (FMa), leaf blades mass of tussocks (LBMt), real forage allowance (FAr), sward height of the lower stratum (HLS), crude protein (CP), neutral detergent fiber (NDF), organic matter digestibility (OMD), total digestible nutrients (TDN), average daily gain (ADG), body condition score (BCS), reproductive tract score...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pampa biome; Reproductive tract score; Grazing methods; Heifers rearing; Sward height..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001859
Registros recuperados: 2
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