Factors that Influence the Production, Environment, and Welfare of Broiler Chicken: A Systematic Review

Abstract

The objective of the present study was to characterize the scientific production regarding the factors that influence broiler chicken production, and that were published from 2000 to 2015 in journals indexed in the database of Google Scholar, Scielo, and ScienceDirect. The research was done in the Thermal Comfort Laboratory at FEAGRI-UNICAMP, and the concept of the systematic review was applied. The research criterion was initially defined (the keywords) aiming to identify and evaluate the variables that describe the experimental characteristics and the animals. The primary keywords identified were: broiler chicken from commercial strains, broiler production, rearing conditions, thermal environment, air quality, acoustic environment, light intensity, management, and heat stress. Those were the key words searched in the database of the online libraries. The selected articles were registered into an electronic spreadsheet with the title, the name of the authors, year of publication, language, the journal where it was published, the keyword, the period when the research was done, source/ database, and the abstract. A total of 167 articles were selected, and only 34 were added to the review. The use of the systematic review of the literature allowed identifying the main variables that positively influence the broiler performance, such as the temperature near the thermal comfort, the use of roof lining, besides the use of adiabatic cooling and cast bricks in the laterals. The presence of positive ventilation, as well as the use of yellow curtains and constant lighting, has also influenced a better performance to broilers.

A Heuristic and Data Mining Model for Predicting Broiler House Environment Suitability

“…Such an array was used to build Table 2. The lower the broiler weight, the lower the variable's impact in such a specific condition, leading to a decrease in broiler performance [21,22,27]. We used the values of Table 3 to estimate ARC values as a function of broilers age.…”

“…Ambient relative humidity also has an essential role in intensive animal production, affecting the thermal physical status, since the heat can be tolerable with a low humidity rate but is hardly bearable when it is high [17][18][19][20][21]. In a high humidity rate, during cold weather, wall condensation may occur inside the housing, increasing fermentation of the broiler litter, and diseases may occasionally appear in the flock [19][20][21][22][23][24].…”

Legislações e normas para avaliação do bem-estar na produção avícola

“…• Medo: pode-se notar este comportamento quando os tratadores se deslocam rapidamente pelo galpão, por exemplo, os frangos amedrontados por este ou outros motivos podem reduzir os índices produtivos (Baracho et al, 2018).…”

“…• Taxa de lesões: esta medida pode indicar problemas no lote durante a produção ou apanha, podendo ser provocadas por outras aves, por condições do ambiente em que se encontram ou ainda devidas a intervenção humana (por exemplo, na apanha) (Baracho et al, 2018).…”

Profile of digestive organ and carcass yield of broiler chickens reared with free-antibiotics feed-in different elevation area in Banyumas regency, Indonesia

“…The slaughter weight of broiler chickens was different elevation areas due to different temperatures, humidity, and precipitation, which the chickens' welfare. According to Baracho et al (2018) [6] and Baracho et al (2019) [7] , broiler welfare's contributing factors include temperature, humidity, and livestock. High environmental temperature is one of the challenges to the optimum performance of broiler chickens.…”