Effects of Soybean and Rice Bran Oil Supplementation on Lactation Performance and Milk Fatty Acid Profile in Surti Goats

Abstract

An experiment was conducted to study the effect of soybean and rice bran oil supplementation on lactation performance and milk fatty acid profile in Surti goats. Twenty-four multiparous Surti lactating goats were distributed into four groups on the basis of live body weight, parity and previous lactation yield for 150 days. Treatment groups were classified as basal diet supplemented without any oil (CON), 3% of DMI of soybean oil (SBO), 3% of DMI of rice bran oil (RBO) and equi-propotional blend of 3 % of DMI of soybean oil and rice bran oil (SRBO). Basal diet consisted of compound concentrate mixture, green jowar and pigeon pea straws. Milk yield (kg/d), fat concentration (%) and yield (g/d), FCM and ECM yield (kg/d) were significantly (p<0.05) increased in oils supplemented groups as compared to control. Concentration of milk composition parameters like SNF, protein and lactose remained similar (p>0.05) amongst treatments but their yield (g/d) was significantly (p<0.01) improved in oils supplemented groups as compared to control. Feed efficiency in terms of MY/DMI and FCM/ DMI significantly (p<0.05) improved in SBO, RBO and SRBO as compared to CON. Supplementation of both soybean oil and rice bran oil either alone or in combination significantly reduced SCFA, MCFA, SFA with increased LCFA and PUFA in milk. Oil supplementation increased (p<0.01), oleic acid (C18:1 n-9) and linoleic acid (C18:2 n-6) in SBO, RBO and SRBO as compared to CON. However, linolenic acid (C18:3 n-9) remained non significant amongst treatments. Various lipid quality indices like atherogenicity index and thrombogenicity index were significantly (p<0.01) improved in all the oil supplemented groups as compared to CON indicating improved nutritional quality of milk.