Influence of oral administration of Salix babylonica extract on milk production and composition in dairy cows
2014
Abdelfattah Z.M. Salem | Ahmed E. Kholif | Mona M.Y. Elghandour | German Buendía | María D. Mariezcurrena | Saul R. Hernandez | Luis M. Camacho
A 3×3 Latin Square design was used to evaluate effects of 0, 150 and 300 mL of <em>Salix babylonica</em> (SB) extract mixed into the diet on daily milk production and composition in cows. Three Brown Swiss dairy cows (420±30.3 kg body weight), at late lactation (220±25.1 d in milk), were fed a diet with a restricted amount of concentrate and oat hay <em>ad libitum</em> twice daily in equal amounts. The SB extract was mixed daily with a small amount of concentrate and fed to the cows. <em>In vitro</em> gas production of the diet fed to the cows was recorded at 2, 4, 6, 8, 10, 12, 24, 48, and 72 h of incubation with 0, 0.6, 1.2 and 1.8 mL SB/g DM. Intake of oat hay was increased (P<0.05) by 11.5% with the SB addition at 150 mL/d. Milk production was also increased with extract addition at 150 or 300 mL/d by about 13.3 and 8.9% respectively, compared with control. Milk fat was lower (P<0.05) with SB addition, while milk protein and lactose were not affected by the extract addition. Milk efficiency was improved (P<0.05) with extract addition versus control. In vitro gas production of the diet increased (P<0.05) dramatically with increasing levels of extract addition with a short lag time and high rate of gas production per hour vs control. Addition of SB extract at 150 mL/d improved milk production by 13.3%, while it decreased its fat content and improved milk efficiency.
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