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

• Published in: Journal of thermal biology 2024-01, Vol.119, p.103798-103798, Article 103798
• Main Authors: Azevedo, Luciano Araujo, Canozzi, Maria Eugênia Andrighetto, Rodhermel, Julio Cesar Bailer, Schwegler, Elizabeth, La Manna, Alejandro, Clariget, Juan, Bianchi, Ivan, Moreira, Fabiana, Olsson, Débora Cristina, Peripolli, Vanessa
• Format: Article
• Language: English
• Subjects: Animal Feed - analysis; Animals; Average daily gain; Cattle; Climate; Diet - veterinary; Heat stress; Heat Stress Disorders - prevention & control; Heat Stress Disorders - veterinary; Heat-Shock Response; Respiratory Rate; Shade; Sprinkler; Sunlight
• ISSN: 0306-4565; 1879-0992
• DOI: 10.1016/j.jtherbio.2024.103798

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