Effects of Cinnamaldehyde on Growth Performance,Antioxidant Capacity and Intestinal Health of Broilers Under Heat Stress
This experiment was conducted to investigate the effects of dietary cinnamaldehyde on growth per-formance,serum biochemical indices,antioxidant capacity and intestinal health of broilers under heat stress.A total of 288 healthy 817 broilers of 21-day-old with similar body weight were randomly divided into 6 groups with 6 replicates per group and 8 broilers per replicate.Broilers in the thermoneutral group(TN group)were fed a basal diet with the ambient temperature set at(24±2)℃(24 h/d);those in the other five groups were subjected to heat stress with the ambient temperature set at(33±2)℃(8 h/d)from 09:30 to 17:30 and(24±2)℃(16 h/d)for the rest of the day,and were fed the basal diet supplemented with 0(HT group),100(HT100 group),200(HT200 group),400(HT400 group)and 800 mg/kg(HT800 group)cinnamal-dehyde,respectively.The experiment lasted for 21 days.The results showed as follows:1)compared with TN group,the final body weight(FBW),average daily gain(ADG)and average daily feed intake(ADFI)of broilers in HT group were significantly decreased(P＜0.05),and the feed to gain ratio(F/G)was significant-ly increased(P＜0.05);the rectal temperature in HT group was significantly increased after day 3(P＜0.05);the serum alanine aminotransferase(ALT)activity in HT group was significantly increased(P＜0.05),and the alkaline phosphatase(ALP)activity and contents of glucose(GLU),total protein(TP),albumin(ALB)and urea nitrogen(UN)in serum were significantly decreased(P＜0.05);the serum total superoxide dismutase(T-SOD)activity in HT group was significantly increased(P＜0.05),and the serum total antioxi-dant capacity(T-AOC)was significantly decreased(P＜0.05);the contents of D-lactic acid(D-LA)and li-popolysaccharide(LPS)and the diamine oxidase(DAO)activity in serum in HT group were significantly in-creased(P＜0.05),and the villus height of duodenum and jejunum and the villus height to crypt depth ratio(V/C)of jejunum were significantly decreased(P＜0.05).2)Under the heat stress conditions,compared with HT group,FBW and ADG of broilers in HT400 and HT800 groups were significantly increased(P＜0.05),and F/G was significantly decreased(P＜0.05);the rectal temperature in each cinnamaldehyde supple-mental group was significantly decreased at 17:30 on day 21(P＜0.05);the serum ALT activity in HT800 group was significantly decreased(P＜0.05),and the serum ALP activity in HT400 group was significantly in-creased(P＜0.05);the serum T-SOD activity in HT200,HT400 and HT800 groups was significantly in-creased(P＜0.05),the serum malondialdehyde(MDA)content in HT100,HT200 and HT800 groups was significantly decreased(P＜0.05),and the serum T-AOC in each cinnamaldehyde supplemental group was sig-nificantly increased(P＜0.05);the contents of D-LA and LPS in serum in HT100,HT400 and HT800 groups were significantly decreased(P＜0.05),and the villus height of jejunum in HT400 group was significantly in-creased(P＜0.05).In conclusion,dietary cinnamaldehyde can alleviate the increase in rectal temperature of broilers under heat stress,increase the body antioxidant capacity,improve intestinal permeability and morpho-logical structure to maintain intestinal health,and then improve the growth performance of broilers.The supple-mentation of 400 mg/kg cinnamaldehyde has the best effect.[Chinese Journal of Animal Nutrition,2024,36(9):5642-5655]
heat stresscinnamaldehydebroilersgrowth performanceantioxidant capacityintestinal health
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维普
