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Effect of relative humidity at either acute or chronic moderate temperature on growth performance and droppings' corticosterone metabolites of broilers

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Journal of Integrative Agriculture 2019年第1期18卷 152-159页

作者： ZHOU ying LI Xiu-mei ZHANG Min-hong FENG Jing-hai State Key Laboratory of Animal Nutrition institute of Animal ScienceChinese Academy of Agricultural Sciences

The present study aimed to investigate the effect of relative humidity(RH) at either acute or chronic moderate ambient temperature(Ta) on growth performance and droppings' corticosterone metabolites of broilers.Two experiments were conducted: effect of RH(35,60 or 85%) on average daily feed intake(ADFI) and droppings' corticosterone metabolites at acute(1 d: 20–26 or 31–20°C,26 or 31°C for 6 h d–1 at 10:00–16:00) moderate Ta(experiment 1) and effect of RH(35,60 or 85%) on growth performance and droppings' corticosterone metabolites at chronic(step-wisely increasing temperature by 3°C every 3 d from 20 to 32°C within 15 d: 20–23–26–29–32°C) moderate Ta(experiment 2).droppings were collected at the 2,4,6,8,and 22 h after Ta-RH controlled in experiment 1 and at the 2,4,6,and 22 h after Ta controlled to 32°C in experiment 2.The results showed that: 1) In experiment 1,85% RH increased(Pdroppings' corticosterone metabolites at the 2,6,8,and 22 h and 35% RH increased(P0.05) was found in ADFI among the three RH groups at acute moderate 26°C; 35 and 85% RH increased(Pdroppings' corticosterone metabolites at the 2,6,8 and 22 h and decreased(Pdroppings' corticosterone metabolites and further decreased(Pdroppings' corticosterone metabolites in the whole period had a negative correlation(Pdroppings' corticosterone metabolites only at the 2 h and decreased(P0.05) in droppings' corticosterone metabolites was found between the 35 and 60% RH,however,35% RH decreased(Pdroppings' corticosterone metabolites in the whole period al

关键词： broiler droppings’ corticosterone metabolites relative humidity acute moderate temperature chronic moderate temperature

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