Effects of Organic Feed Containing Rice Bran and Soybean Hull on Milk Production of Mid-Lactation Dairy Goats
2010
Park, J.K., National Institute of Animal Science, RDA, Suwon, Republic of Korea | Kim, C.H., Hankyong National University, Ansung, Republic of Korea
This study was conducted to investigate the effect of organic feed containing rice bran and soybean hull as organic by-products on milk production of mid-lactation dairy goats. Four Saanen dairy goats (initial BW 59.4±7.4 kg, average 6 lactation months, fourth kidding) were allocated into conventional feed group (T1) and organic feed group (T2) with 2×3 crossover design for 9 weeks. Experimental diets were formulated to contain 23 MJ ME/d, 382 g CP/d DM based on NRC (1981) and AFRC (1998). Dry matter (DM) intakes of concentrate and silage were higher in T2 (1,232 and 96 g/d) than T1 (1,105 and 91 g/d) (p less than 0.05). However, DM intake of hay was higher in T1 (488 g) than T2 (347 g) (p less than 0.05). Total DM intake had no significant difference between T1 and T2. Although no significant difference was found in milk yield between treatments, T2 numerically increased (+150 g/d) compared with T1. There were no significant differences in milk composition and milk urea nitrogen (MUN) between T1 and T2. Relative to T1, T2 significantly increased the stearic acid (C18:0) and linoleic acid (C18:2) (p less than 0.05). Overall results of the present experiment indicated that organic feed could not adversely affect DM intake and milk production in dairy goats compared with conventional feed.
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