TY - JOUR ID - 21500 TI - Effects of Supplemental Conjugated Linoleic Acid (CLA) on Milk Yield and Composition, Energy Balance and Blood Metabolites of Holstein Lactating Dairy Cows in their Early Lactation JO - Iranian Journal of animal Science JA - IJAS LA - en SN - 2008-4773 AU - Mahdavi, Ata AU - Reza Yazdi, Kamran AU - Zare Shahneh, Ahmad AU - Dehghan Banadaki, Mahdi AD - Y1 - 2010 PY - 2010 VL - 41 IS - 2 SP - EP - KW - Blood metabolites KW - Conjugated Linoleic Acid (CLA) KW - Energy balance KW - Holstein dairy cow KW - Milk Composition DO - N2 - The aim of this experiment was to study the effect of Conjugated Linoleic Acid (CLA) supplement on milk yield, milk composition,energy balance and blood metabolites of Holstein cows in their early lactation. Fifteen multiparous lactating Holstein cows (20±3 DIM, 637±8 kg initial BW) were blocked by milk production, and assigned in a completely randomized block design to 1 of 3 treatments, namely: 1) control (basal diet+115g/d Ca salts of palm fatty acids), 2) Rumen protected CLA (basal diet+120g/d of lipid encapsulated CLA), and 3) Rumen unprotected CLA (basal diet+40g/d rumen unprotected CLA). Doses provided a total of 96g of fatty acids per day. Dry matter intake and milk yield were recorded daily. Milk composition, body weight and body condition score were measured weekly during the 35 days of the experiment. Blood samples were collected twice in days 14 and 35 of experiment. Results indicated that rumen protected CLA supplement reduced milk fat content by 17.8% as compared with control (P UR - https://ijas.ut.ac.ir/article_21500.html L1 - https://ijas.ut.ac.ir/article_21500_be8ae2af9939fef3c7dff64e073aed31.pdf ER -