The effects of some agricultural By-products on ruminal fermentation and apparent digestibility of Holstein dairy cow
نویسندگان
چکیده
This study was carried out to evaluate the effects of replacing alfalfa hay with ensiled mixed tomato and apple pomace (EMTAP) on ruminal fermentation and apparent digestibility of diets. Six multiparous Holstein dairy cows in mid lactation were used in 3×3 Latin square design and fed alfalfa hay plus concentrate mixture with three levels replacement with EMTAP (0, 15, 30%) during 63 days. Results showed that, differences between treatments were significant. Feeding EMTAP resulted in a significant higher acetic and propionic acids and total volatile fatty acids concentration and significant (P<0.01) lower rumen pH. The substitution of EMTAP in dairy cow diets is associated with a better DM, OM, CP and NDF digestibility. It was concluded that, EMTAP can efficiently replace up to 30% alfalfa hay. The nutritive value of tomato and apple pomace could be improved when they are used together (50:50) in dairy cows diet. [Farzad. Abdollahzadeh, Rahim Abdulmalaki. The effects of some agricultural By-products on ruminal fermentation and apparent digestibility of Holstein dairy cow. Life Sci J 2012;9(4):81-85] (ISSN:1097-8135). http://www.lifesciencesite.com. 13
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