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Provedor de dados:  R. Bras. Zootec.
País:  Brazil
Título:  The influence of covering methods on the nutritive value of corn silage for lactating dairy cows
Autores:  Amaral,Rafael Camargo do
Santos,Mateus Castilho
Daniel,João Luiz Pratti
Sá Neto,Adir de
Bispo,Álvaro Wosniak
Cabezas-Garcia,Edward Hernando
Bernardes,Thiago Fernandes
Nussio,Luiz Gustavo
Data:  2014-09-01
Ano:  2014
Palavras-chave:  Dairy cow
Film protection
In vivo digestibility
Resumo:  The objective of this study was to evaluate the effect of covering methods on the nutritive value of corn silage and performance of dairy cows. Whole-plant corn was harvested at 340 g/kg of dry matter (DM) and ensiled for 135 d in horizontal silos covered with one of the following methods: oxygen barrier film (45-µm thick) + white-on-black polyethylene film (200-µm thick) over the oxygen barrier film (OB+WB); white-on-black polyethylene film (200-µm thick) (WB); black polyethylene film (200-µm thick) (B); or recycled black polyethylene film (200-µm thick) covered with a layer of 10 cm of sugarcane bagasse (RB+SB). Nutrient composition, fermentation profile, and yeast and mold counts in edible silages were similar across treatments. Silage temperature during the storage period was 24.6, 28.7, 28.4 and 33.1 °C for RB+SB, OB+WB, WB and B, respectively, and the proportion of spoiled silage ranged from 28.7 (for the RB+SB treatment) to 74.2 g/kg DM (for the B treatment). Dry matter intake was similar across treatments and averaged 21.9 kg/d. Milk production was higher for cows fed corn silage covered with RB+SB (34.4 kg/d) compared with those fed corn silage covered with B (30.4 kg/d), resulting in higher feed efficiency for RB+SB treatment. Silages covered with OB+WB and WB had intermediate values. In vivo digestibility of organic matter was higher for cows fed corn silage covered with RB+SB compared with those fed corn silage covered with WB and B, but were similar to those fed corn silage covered with OB+WB. The utilization of oxygen barrier films and the protection of polyethylene film with sugarcane bagasse are effective strategies to increase the recovery of digestible nutrients and, consequently, to enhance production efficiency of lactating dairy cows.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Zootecnia
Relação:  10.1590/S1516-35982014000900003
Formato:  text/html
Fonte:  Revista Brasileira de Zootecnia v.43 n.9 2014
Direitos:  info:eu-repo/semantics/openAccess

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