title: Effect of Supplementing Diets of Anglo-Nubian Goats with Soybean and Flaxseed Oils on Lactational Performance.
abstract: We studied the effect of soybean or flaxseed oil feeding in the diets of lactating Anglo-Nubian goats. A total of 20 goats (33.6 ± 0.6 kg) were divided into four treatments and fed a basal diet of berseem clover and concentrates (40:60 DM basis; control) or the control diet supplemented with either 20 mL/day of flaxseed oil or soybean oil or 10 mL of soybean oil plus 10 mL of flaxseed oil per day for 12 weeks (i.e., 22 to 23 g per kg of DM intake). Oil inclusion decreased ruminal pH (P < 0.05), and acetate but increased (P < 0.05) total volatile fatty acids and molar proportion of propionate and blood glucose (P < 0.01). In addition, increased milk yield and decreased milk-fat contents were evident (P < 0.05) with oil supplementation. Diets containing oil increased (P < 0.05) unsaturated fatty acids (FA), conjugated linoleic acid, and the athrogenicity index of milk fat but decreased saturated FA concentrations. It is concluded that soybean-oil or flaxseed-oil supplementation of goats at 20 mL/day increased feed utilization and milk production.
authors.affiliation: Dairy Science Department, National Research Centre , 33 Bohouth Street, Dokki, Giza, Egypt.
authors.forename: Ahmed E
authors.initials: AE
authors.lastname: Kholif
authors.affiliation: Dairy Science Department, National Research Centre , 33 Bohouth Street, Dokki, Giza, Egypt.
authors.forename: Tarek A
authors.initials: TA
authors.lastname: Morsy
authors.affiliation: Dairy Science Department, National Research Centre , 33 Bohouth Street, Dokki, Giza, Egypt.
authors.forename: Ahmed M
authors.initials: AM
authors.lastname: Abd El Tawab
authors.affiliation: Carrington Research Extension Center, North Dakota State University , 663 Highway 281 NE, Carrington, North Dakota 58421, United States.
authors.forename: Uchenna Y
authors.initials: UY
authors.lastname: Anele
authors.affiliation: College of Agricultural Sciences & Natural Resources, Texas Tech University , Lubbock, Texas 79409, United States.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Galyean
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D019587:Dietary Supplements / Q000032:analysis; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D006041:Goats / Q000254:growth & development / Q000502:physiology*; D007774:Lactation; D008043:Linseed Oil / Q000378:metabolism*; D013024:Soybean Oil / Q000378:metabolism*
chemical_list: D005227:Fatty Acids; D013024:Soybean Oil; D008043:Linseed Oil
keywords: conjugated linoleic acid; feed utilization; goats; milk; milk fatty acids; plant oil