Results (
Thai) 1:
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2.1. Animals, diets and managementA total of 120 two-year-old female mink (Neovison vison) of the standard black genotype were housed in roofed standard sheds with open sides. The experimental period extended from 14 d before mating until parturition. All animals were weighed at start of experiment and distributed randomly into four experimental groups from A to D with dietary protein levels of 32, 36, 40 and 44%, respectively. These levels corresponded to average 320, 360, 400 and 440 g protein/kg dry matter (DM), respectively. Decreasing dietary protein levels (in the experiment from 317.9 to 453.9 g/kg DM) from groups A to D were compensated by increasing the level of dietary carbohydrates (from 413.8 to 246.7 g/kg DM). Ether extract (EE) content (g/kg DM) in the diets remained constant within the range from 166.5 to 167.0 g/kg DM, so the diets were isocaloric. Throughout the experimental period, mink were fed the experimental diets twice a day ad libitum at 0800 and 1600 (Beijing time), and drinking water was taken freely by mink. The ingredients of the four diets were listed in Table 1, chemical composition in Table 2, and amino acid content in Table 3.
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