The Effect Of Enzymatic Hydrolysis Of Blood Peptide On Reproductive Performance, Blood Biochemical Indicators, And Nutrient Digestibility Of Sows

In this study,108 sows(Landrace × Yorkshire)with similar parity and weight,good health were selected and randomly divided into 6 treatments with 18 repeats per treatment,each repeat for 1 sow.Treatment? was control group fed the basal diet;treatment? to treatment? for the test group,were fed with 0.5%,1%,2%,3%,4% feather blood hydrolysate diet respectively.The test begins with the sow breeding and ends when the sows were weaned and rutted once again.The results showed that when pregnant sow diet supplemented with the feather blood hydrolysate,the colostrum quality of the sow could be improved,and when the pregnant diet was added 0.5% feather blood hydrolysate,the milk protein increased by 28.55%(P =0.074),and the non-milk fat solids increased by 26.76%(P =0.071).Pregnant sow diets supplemented with feather blood hydrolysate can improve sow reproductive performance,when the diet by adding 0.5% feather blood hydrolysate,the weight of a litter of newborn piglets increased by 13.57%(P =0.078).Addition of the feather blood hydrolysate in the pregnant sow diet could reduce sow pregnancy serum urea nitrogen and increase sow pregnancy serum IgG(immunoglobulin G).The serum urea nitrogen was reduced by 24.29%(P <0.05)when 4% of feather blood hydrolysate was added to the diet.When the 1% feather blood hydrolysate was added to the diet,the serum Ig G(immunoglobulin G)was increased by 26.25%(P =0.159).But no effect on the digestibility of nutrients was found at all stages in the sow during pregnancy.Lactating sow diet supplemented with 0.5% feather blood hydrolysate can improve the growth performance of piglets,the litter weight of weaning piglets increased by 13.77%(P <0.05),and the average weight of weaned piglets was increased by 10.74%(P <0.05).When feather blood hydrolysate was added to the lactating diet,the digestibility of nutrients was not affected in the sow during lactation.Dietary supplementation of feather blood hydrolysate in lactation sows did not affect weaning-oestrus interval,blood biochemical index and immunoglobulin.From the overall effect of this experiment,the addition of feather blood hydrolysate in diets could improve the reproductive performance and blood biochemical indexes of sows,and 0.5% is the best dose were obtained when the feather blood hydrolysate was added in the pregnant and lactating sow diet.