Effects Of Dietary Potassium Butyrate Supplementation On The Reproductive Performance, Blood Biochemical Index And Milk Composition In Sows

Hight degree of hereditary and selection on modern lactating sow,which have the highter reproductive performance,but the feed intake and the lactating capacity have not significantly improve.The lactating performance is the key of suckling piglet growth, because of the suckling piglet growth nutriention dependent on breast milk supply. Butyrate salt is a short chain fatty acids salt, dietary butyrate salt supplementation through change of feed tastiness, intestinal growth and digestive enzyme activity in the intestinal, that effect the feed intake of animal and degestion and absorption of nutrient substance, improve milk composition, effects of piglet growth performance.The experiment was conducted to study the of dietary potassium butyrate supplementation on the reproductive performance, blood biochemical index and milk composition in lactating sows. Fifty-six PIC sow,with similar parity,body condition and expected date of delivery,were allocated into four groups with fourteen replicates, each replicate containing one sow. Sows were fed with basal diet supplemented with 0%,0.075%,0.15%,0.30% potassium butyrate,respectively.The experiment lasted for 55 days. The results showed that:1,The effect of the average daily feed intake:from day 1 to day 7,four groups had no significant effects on average daily feed intake (P>0.05),from day 8 to day 14, from day 1 to day 21,in 0.15% group was significant higher than that in control group and 0.075% group(P<0.05).0.15% group had decreased by 18.5%,18.07% than that in control group and decreased by 11.73%,12.21% than 0.075% group. From day 15 to day 21,0.15% group was significant higher than that in 0.075% group(P<0.05). The other groups had no significant effects (P>0.05)2,The effect of the performance of piglet:the number of piglets at birth and weanling piglets,four groups had no significant effects (P>0.05). the number of weanling piglets 0.15% group increased by 2.78%,4.96% and 1.39% compared with control group,0.075% group and 0.3% group. The number of weanling pigletsSurvival rate on 21day, four groups had no significant effects (P>0.05),there were the best results in 0.15% group among all groups.was 90.78%.Litter weight of litter and Piglet weight at birth four groups had no significant effects (P>0.05) Weanling gain weight of litter and litter weight gain,0.15% group was significant higher than that in control group,0.075% group and 0.30% group(P<0.05).Piglet average weight at weanling,0.15% group was significant higher than that in control group and 0.075% group(P<0.05). Average daily piglet gain,0.15% group and 0.3% group was significant higher than that in control group, was 210.23 g/d vs201.29 g/d vs177.66 g/d(P<0.01). The regression equation between ADG (y,g/d)and potassium butyrate intake(x,g/d) was established as y=-0.27x2+5.84x+177.14,R2=0.28,P<0.01;3,On day 1 of lactation:0.15% group milk fat was significant higher than that in control group and 0.075% group(P<0.05).0.15% group solids-not-fat was significant higher than that in control group (P<0.05). Four groups had no significant effects on milk protein,milk lactose and total solids (P>0.05); On day 14 of lactation:0.15% group milk fat and total solids were significant higher than that in control group(P< 0.05).0.075% group and 0.3%group(P<0.05).0.15% group milk lactose was significant higher than that in control group(P<0.05).Milk protein in 0.075% group,0.15% group and 0.3% group were significant higher than that in control group(P<0.05). Four groups had no significant effects on solids-not-fat (P>0.05)4,On day 1 of lactation,0.15% group plasma glucose and triglyceride were significant higher than that in control group and 0.075% group(P<0.05). On day 14 and 21 of lactation, four groups had no significant effects on plasma glucose and triglyceride (P>0.05). On day 1,14 and 21 of lactation, four groups had no significant effects on plasma free fatty acid (P>0.05) These results demonstrated that:0.15% dietary potassium butyrate supplementation could improve feed intake of the lactating sows, average daily piglet gain and milk fat of sows.