Effects Of Flavor Enhancers In The Lactating Sows

Feed intake was one of the main factors limiting the production performance and reproductive performance of lactating sows play, directly affected the economic benefits of lactating sows. Flavor enhancers(FE) was a newly discovered enhancer in recent years, it was a kind of compound food can enhance the flavor. Adding FE in lactation diets may be through improving the palatability of feed to stimulate the appetite of lactating sows so as to improve the feed intake. FE adding in lactation diets application had not been reported so far, the suitable addition level was not clear yet. Therefore this test was aimed to study on the effect of flavor enhancers in the lactating sows, in order to provide a scientific basis for the application of FE in lactating sows.Test one aimed at effects of flavor enhancers on production performance, serum physiological and biochemical indexes, milk composition, nutrient digestibility and intestinal microbial populations in lactating sows. A total of 80 multiparous pregnancy Yarkshires sows(which had good condition,P2 backfat(22.88±4.70)mm, similar birth day age and parity)were randomly arranged into 4 groups with 5 replicates per group and 4 lactating sow per replicate. Control group was fed a basal diet. Experimental groups I was fed the basal diets supplemented with 0.5 g/kg FE.Experimental groups II was fed the basal diets supplemented with 1.0 g/kg FE. Experimental groupsIII was fed the basal diets supplemented with 2.0 g/kg FE. The day of delivery the trial began, feeding 21 days after weaning, the trial was end. Experimental period was 21 day. The results showed as follows:(1)Dietary supplementation with 0.5 g and 1.0 g/kg FE could extreme significantly improve lactating sows average daily feed intake and could extreme significantly reduce the lactating sow backfat loss(P<0.01),Adding 1.0 g/kg FE in diet could significantly improve lactation milk yield of sows and significantly reduce the rate of diarrhea and mortality in piglets(P<0.05). (2)Adding 1.0 g/kg FE in diet could extreme significantly decreased the serum CCK of lactating sows(P<0.01),significantly improve the serum IGF-1 (P<0.05), adding 0.5 g/kg FE could extreme significantly improve the Ghrelin in milk(P<0.01),significantly decrease serum LEP(P<0.05).(3)Adding FE in diet had no significant effect on milk composition, nutrient digestibility and intestinal microflora of lactating sows(P>0.05).The conclusion was as follow:The result showed that the adding appropriate levels of FE could significantly improve lactating sow feed intake, milk yield and reduce backfat loss, the rate of diarrhea and mortality in piglets,improve the physiological and biochemical index of blood,improve the digestion and absorption of protein and other nutrients,maintain the balance of intestinal flora.The suitable FE additive amount on lactaing sows was 0.5～1.0 g/kg.Test two aimed at the partial evaluation of replacement gilts to different concentration of FE. A total of 12 large white replacement gilts(which had good condition,similar weight)were randomly arranged into 3 groups with 4 replicates per group and 1 replacement gilt per replicate.Experimental groupsⅠwas fed the basal diets and basal diets supplemented with 0.5 g/kg FE,Experimental groupsⅡwas fed the basal diets and basal diets supplemented with 1.0 g/kg FE,Experimental groupsⅢwas fed the basal diets and basal diets supplemented with 2.0 g/kg FE.The basal diet of control group was the same with that of experimental groups.Experimental period was 5 days.The results showed as follows:(1)The replacement gilts had a moderate to high preference for 0.5 g/kg FE,the replacement gilts had no preference for 1.0g/kg FE, and had a moderate to high degree of aversion for 2.0 g/kg FE,The difference was significant between the groups.(2)Gilts on 0.5 g/kg FE partial index was 2.24,1.0 g/kg FE was 1.20,2.0 g/kg FE was 0.63.The conclusion was as follow:The concentration of replacement gilts favorite FE was 0.5-1.0 g/kg.