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Interactive effects of high temperature and crude protein levels on growth performance, nitrogen excretion, and fecal characteristics of broilers

文献类型： 外文期刊

作者： Liu, Quanwei 1 ; Feng, Jinghai 3 ; Wei, Limin 1 ; Hu, Chengjun 4 ; Zheng, Xinli 1 ; Sun, Ruiping 1 ; Zhang, Minhong 3 ;

作者机构： 1.Hainan Acad Agr Sci, Inst Anim Sci & Vet Med, Haikou 571100, Hainan, Peoples R China

2.Hainan Key Lab Trop Anim Reprod Breeding & Epidem, Haikou 571100, Hainan, Peoples R China

3.Chinese Acad Agr Sci, Inst Anim Sci, Beijing 100193, Peoples R China

4.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Hainan, Peoples R China

关键词： High temperature; Crude protein level; Broiler; Nitrogen excretion; Fecal characteristics; Growth performance

期刊名称：TROPICAL ANIMAL HEALTH AND PRODUCTION （ 影响因子：1.893； 五年影响因子：1.93 ）

ISSN： 0049-4747

年卷期： 2022 年 54 卷 6 期

页码：

收录情况： SCI

摘要： In the present study, we aimed to explore the interactive effects of high temperature (HT) and dietary crude protein (CP) levels on nitrogen (N) excretion, fecal characteristics, and growth performance of broilers. A total of 288 broilers (Arbor Acres) were divided into six groups with eight replicates (six broilers per replicate). Two temperatures (ambient temperature: AT, 23 degrees C; HT: 28 similar to 32 similar to 28 degrees C) and three diets (CP: 14.90%, 18.18%, or 21.19%, with equal amounts of essential amino acids) were examined in a 2 x 3 factorial design. The experiment arrangement was from 4 to 6 weeks of age. The results showed that HT led to a significant decrease in the N excretion (P < 0.0001), average daily feed intake (P < 0.0001), and weight gain of broilers (P < 0.0001), while it markedly increased the fecal pH (P = 0.015), fecal moisture (P = 0.0014), uric acid (UA) contents (P = 0.0018), and feed/gain ratio (P < 0.0001). A low CP diet significantly decreased the N excretion (P < 0.001), fecal pH (P = 0.016), fecal moisture (P < 0.0001), and UA contents (P < 0.0001), while it markedly increased the feed/gain ratio (P < 0.001). In conclusion, HT had a negative impact on the fecal characteristics and growth performance of broilers but showed positive effects on N excretion. Moreover, decreased CP levels had a positive effect on the N excretion and fecal characteristics in broilers.

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