[Objective]The paper was to investigate the effects of different additive combinations on reproductive performance of sows and growth performance of suckling piglets under heat stress.[Method]Using single factor desig...[Objective]The paper was to investigate the effects of different additive combinations on reproductive performance of sows and growth performance of suckling piglets under heat stress.[Method]Using single factor design,48 Landrace×Yorkshire lactating sows(3-6 fetuses)were randomly divided into four treatments.The sows in control group were fed with basic diet,and those in experimental groups were fed with the basic diets added with sorbitol(5000 mg/kg),citric acid(4000 mg/kg)+betaine hydrochloride(2000 mg/kg)and tangerine powder(2000 mg/kg),respectively.Each treatment was replicated 12 times,1 lactating sow per replicate.The daily average temperature was 28℃ and the humidity was over 92%.The whole trial lasted 35 d(7 d before delivery to 7 d after weaning).[Result]Sorbitol,citric acid+betaine hydrochloride and tangerine powder had no significant effect on reproductive performance of sows under heat stress.Compared with the control group,there was no significant difference in feed intake of lactating sows in sorbitol group,citric acid+betaine hydrochloride group and tangerine powder group;the litter weight gain of piglets in sorbitol group was improved by 23.97%during lactation period(P<0.05),while no significant difference was observed in litter weight gain of piglets in citric acid+betaine hydrochloride group and tangerine powder group.Under the experimental conditions,the annual net profits of sows in sorbitol group,citric acid+betaine hydrochloride group and tangerine powder group were 525.45,403.81 and 389.47 yuan,respectively.[Conclusion]Sorbitol significantly improves the growth performance of piglets,showing the highest cost performance.展开更多
文摘[Objective]The paper was to investigate the effects of different additive combinations on reproductive performance of sows and growth performance of suckling piglets under heat stress.[Method]Using single factor design,48 Landrace×Yorkshire lactating sows(3-6 fetuses)were randomly divided into four treatments.The sows in control group were fed with basic diet,and those in experimental groups were fed with the basic diets added with sorbitol(5000 mg/kg),citric acid(4000 mg/kg)+betaine hydrochloride(2000 mg/kg)and tangerine powder(2000 mg/kg),respectively.Each treatment was replicated 12 times,1 lactating sow per replicate.The daily average temperature was 28℃ and the humidity was over 92%.The whole trial lasted 35 d(7 d before delivery to 7 d after weaning).[Result]Sorbitol,citric acid+betaine hydrochloride and tangerine powder had no significant effect on reproductive performance of sows under heat stress.Compared with the control group,there was no significant difference in feed intake of lactating sows in sorbitol group,citric acid+betaine hydrochloride group and tangerine powder group;the litter weight gain of piglets in sorbitol group was improved by 23.97%during lactation period(P<0.05),while no significant difference was observed in litter weight gain of piglets in citric acid+betaine hydrochloride group and tangerine powder group.Under the experimental conditions,the annual net profits of sows in sorbitol group,citric acid+betaine hydrochloride group and tangerine powder group were 525.45,403.81 and 389.47 yuan,respectively.[Conclusion]Sorbitol significantly improves the growth performance of piglets,showing the highest cost performance.