Milk yield and composition in dairy goats fed different levels of extruded soyabeans

Abstract

Sixteen dairy goats were assigned to a 4 x 4 Latin square design. Full-fat extruded soyabeans (EXSB) were fed at rates of 0, 150, 300, and 400 g/day, and grass hay was fed for ad libitum intake. Dietary EXSB had no effect on milk yield and milk fat content (P>0.05). Feeding increasing levels of EXSB linearly increased the concentrations of casein and whey protein in milk, and the concentration of conjugated linoleic acids in milk fat (P0.05). Feeding EXSB has the potential to improve the quality of milk for processing as well as the nutritive value of milk fat.