Effects of Infusing Sodium Acetate into External Pudic Artery on Nutrient Uptake and Utilization in the Mammary Gland of Guanzhong Dairy Goats
SUN Manji1,2LU Dexun2*WANG Lifang2LI Ran1LIU Caijuan1(1. Northeast Agricultural University, Harbin 150030, China; 2. Inner Mongolia Agricultural University, Huhhot 010018, China)Abstract:Effects of infusing sodium acetate into the external pudic artery on nutrient uptake and utilization by the mammary gland and milk components of lactating goats were studied in this paper. Four Guanzhong dairy goats were fixed with vessel catheters at the external pudic artery in 4×4 Latin square design. Sodium acetate was infused 0, 12, 16 and 24 g/d in the treatment groups, respectively. The results were showed as follows: compared with not infusing sodium acetate group, under the condition of feeding a basal diet infusing sodium acetate, the milk fat rate was significantly raised by 8.00%～11.71% (P<0.05) and the content of other milk components changed insignificantly (P>0.05). The concentrations of acetic acid and volatile fatty acid (VFA) in the mammary artery and uptake quantity of acetic acid, butyric acid and VFA by the mammary gland were very significantly raised (P<0.01). Infusing sodium acetate into the external pudic artery caused uptake quantity of blood amino acids slightly decreased (P>0.05). Uptake quantity of glucose and triglyceride by the mammary gland were changed insignificantly (P>0.05). EAA/NEAA in artery-vein blood in infusing 16 and 24 g/d sodium acetate groups were raised significantly (P<0.05). Infusion of sodium acetate increased efficiency of milk fat precursors energy transformed to milk fat energy by 1.02%～2.04%, amino acids energy transformed to milk protein energy by 4.07%～9.09% and glucose energy transformed to lactose energy by 3.39%～5.08%.［Chinese Journal of Animal Nutrition, 2009，21(6):865-871］