To explore the effects of dandelion polysaccharides on the growth performance,serum biochemical indicators,and immune indicators of heat stressed piglets.500 healthy and 28 day old DLY ternary hybrid piglets with similar weight(8.34±0.27 kg)were randomly divided into 5 groups,with 10 replicates in each group.The control group and heat stress group were fed with basic feed,while treatment I,II,and III were fed with experimental feed supplemented with 400,800,and 1600 mg/kg TMP in the basic feed,respectively.The experimental data showed that compared with the heat stress group,the final weight of piglets in treatment group III significantly increased by 11.37%(P＜0.05),the average daily weight gain significantly increased by 24.63%(P＜0.05),the average daily feed intake significantly increased by 7.59%(P＜0.05),the feed to meat ratio significantly decreased by 13.67%(P＜0.05),and the diarrhea rate significantly decreased by 51.85%(P＜0.05).Compared with the heat stress group,the serum TP,ALB content,T-AOC ability,and SOD activity of piglets in treatment group III were significantly increased(P＜0.05),while the BUN and MDA content were significantly reduced(P＜0.05).Compared with the heat stress group,the serum IgA and IgG contents of piglets in treatment group III were significantly increased(P＜0.05),while the levels of IL-6 and TNF-α were significantly reduced(P＜0.05).The serum LZM content of piglets in treatment groups I～III was significantly increased(P＜0.05).Supplementing with TMP(1600 mg/kg)can partially alleviate the negative regulation of heat stress on piglet growth,development,and serum indicators.
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