Strategies to alleviate heat stress on performance and physiological parameters in feedlot-finished cattle under heat stress conditions. A systematic review-meta-analysis

被引:2
作者
Azevedo, Luciano Araujo [1 ]
Canozzi, Maria Eugenia Andrighetto [2 ]
Rodhermel, Julio Cesar Bailer [3 ]
Schwegler, Elizabeth [1 ]
La Manna, Alejandro [2 ]
Clariget, Juan [2 ]
Bianchi, Ivan [1 ]
Moreira, Fabiana [1 ]
Olsson, Debora Cristina [4 ]
Peripolli, Vanessa [1 ]
机构
[1] Inst Fed Catarinense, Curso Posgrad Prod & Sanidade Anim PGPSA, Campus Araquari, BR-89245000 Araquari, SC, Brazil
[2] Inst Nacl Invest Agr INIA, INIA Estanzuela, Colonia 70000, Uruguay
[3] Inst Fed Catarinense, Campus Araquari, BR-89245000 Araquari, SC, Brazil
[4] Inst Fed Catarinense, Curso Posgrad Prod & Sanidade Anim PGPSA, Campus Concordia, BR-89703720 Concordia, SC, Brazil
关键词
Average daily gain; Respiratory rate; Shade; Sprinkler; Heat stress; DYNAMIC-RESPONSE INDICATORS; THERMOREGULATORY RESPONSES; CARCASS CHARACTERISTICS; BEEF-CATTLE; YOUNG BULLS; SHADE; STEERS; BEHAVIOR; WELFARE; METAANALYSIS;
D O I
10.1016/j.jtherbio.2024.103798
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Strategies to alleviate heat stress on live performance - dry matter intake (DMI), average daily gain (ADG), and feed conversion efficiency (FCE) - and on physiological parameters - respiratory rate (RR) and panting score (PS) - of feedlot-finished cattle were evaluated by systematic review-meta-analysis. Using the PICO framework were identified 3813 records, with 31 publications and 6729 cattle being considered in the meta-analysis (MA). The comparison most reported was sun vs. shade (n = 24 publications), followed by shade vs. shade (area per animal and effectivity in reduce solar load) (n = 7 publications) and sun vs. sprinkling (n = 4 publications). Cattle with access to shade with total reduction in solar load improved ADG (p = 0.008) and FCE (p = 0.024), and reduced RR (p < 0.001) compared to unshaded animals. Cattle with access to shade with a height between 3 and 4 m increased ADG (p < 0.001), tended to improve FCE (p = 0.054), and reduced RR (p < 0.001) compared to unshaded animals. An area of shade from 2 to 4 m(2)/animal increased ADG (p = 0.002), and higher than 4 m(2)/animal reduced RR (p < 0.001) compared to unshaded animals. Animals that received sprinkling volume below 1 L/animal/min improved ADG (p = 0.008) compared to unshaded animals. Cattle with access to shade with a high area per animal improved DMI (p = 0.023) and ADG (p < 0.001) compared to animals with a low area. In univariate meta-regression, it was observed that the variables significantly (P < 0.05) influencing DMI were THI category; influencing ADG were cattle gender, THI category, and coat color; influencing FCE were cattle age and hemisphere; and influencing RR were country, THI category and climate. Performance and physiological parameters of feedlot-finished cattle under heat stress depend on animal and environmental characteristics.
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页数:14
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