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Supplementation strategies for lactating F1 Holstein x Zebu cows on deferred pastures

Guilherme Reis de Souza, Universidade Estadual de Montes Claros, João Paulo Sampaio Rigueira, José Reinaldo Mendes Ruas, Virgílio Mesquita Gomes, Vicente Ribeiro Rocha Júnior, Flávio Pinto Monção, Leidy Darmony de Almeida Rufino, Cinara da Cunha Siqueira Carvalho, Ariadne Freitas Silva, Edilane Aparecida da Silva, Universidade Estadual de Montes Claros (+8 others)
2022 Semina: Ciências Agrárias  

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The objective of this study was to evaluate the effects of different concentrate supplementation strategies to lactating F1 Holstein x Zebu cows managed on deferred signal grass pasture on milk yield, composition and body weight gain. Thirty-six F1 Holstein x Zebu cows with average days in milk of 102 ± 10 and body weight of 501 ± 19 kg were allotted to a 4 x 5 completely randomized factorial design, with four feeding strategies and five weeks of evaluation. The treatments consisted of four
more » ... itional strategies: deferred pasture as a source of roughage + 700 grams of protein supplement (PDPI); deferred pasture as a source of roughage + 1,200 grams of protein supplement (PDPII); deferred pasture + 15 kilograms of corn silage (natural basis) + 1,200 grams of protein supplement (PDSP) and corn silage (ad libitum) + 700 grams of protein supplement (CSS). There was no interaction (P = 0.99) between supplementation strategies and test days on milk yield and chemical composition. The mean milk yield of cows managed on PDPI, PDPII and PDSP was 11.50 kg/day (P > 0.05), which was 14.30% lower than that of cows managed on CSS. Fat content (P < 0.01), protein (P < 0.01), lactose (P < 0.01), defatted dry extract (DDE) (P< 0 .01), total solids (P < 0.01) and milk casein (P < 0.01) were affected by different supplementation strategies. F1 Holstein x Zebu cows on deferred Urochloa decumbens cv. Basilisk pasture and supplemented with concentrate maintains milk production at 11.50 kg with normal composition, maintaining satisfactory body weight and condition score.
doi:10.5433/1679-0359.2022v43n3p1065 fatcat:24i3sxg7qjfhxjzvj5beibhhda
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Guilherme Reis de Souza, Universidade Estadual de Montes Claros, João Paulo Sampaio Rigueira, José Reinaldo Mendes Ruas, Virgílio Mesquita Gomes, Vicente Ribeiro Rocha Júnior, Flávio Pinto Monção, Leidy Darmony de Almeida Rufino, Cinara da Cunha Siqueira Carvalho, Ariadne Freitas Silva, Edilane Aparecida da Silva, Universidade Estadual de Montes Claros, Universidade Estadual de Montes Claros, Universidade Estadual de Montes Claros, Universidade Estadual de Montes Claros, Universidade Estadual de Montes Claros, Empresa de Pesquisa Agropecuária de Minas Gerais, Universidade Estadual de Montes Claros, Universidade Estadual de Montes Claros, Empresa de Pesquisa Agropecuária de Minas Gerais. "Supplementation strategies for lactating F1 Holstein x Zebu cows on deferred pastures." Semina: Ciências Agrárias 43.3 (2022) 1065-1078