The present study investigated the use of perforated plastic floors in rearing male and female poultry under thermal comfort conditions. was conducted 2 climate chambers, one conventional litter (wood shavings) other a floor. experimental design completely randomized with factors wood shavings In each chamber, animals were divided into 16 pens (8 males 8 females) density 12 birds/m2. effect evaluated terms air quality (% concentration ammonia [NH3] carbon dioxide [CO2]); broiler performance,...

Previously, we reported the effect of rearing conditions (plastic floors and air quality) on carcass injury development broiler chickens at thermal comfort. In this study, same were tested stress. The birds reared in 2 climatic chambers, experiment followed a completely randomized design with one factor, flooring material: wood shaving or perforated plastic. divided into 16 experimental pens, being 8 females males. studied parameters as previous study (ammonia concentration, carbon dioxide,...

Este trabalho objetivou avaliar manejos de cobertura e ventilação artificial sobre índices conforto frangos corte. Aplicou-se, para avaliação dos térmicos, delineamento inteiramente casualizado, em parcela subdividida, com arranjo fatorial tratamentos 2 x 2, sendo: dois (com sem pintura reflexiva) internos artificial) totalizando 4 tratamentos, avaliados durante 40 dias, tidos como repetição. Os estudos foram conduzidos no IFG - Campus Urutaí, dezembro/2009 a janeiro/2010. Como variáveis...

The research was developed to evaluate the use of different types roofing materials regularly used in poultry houses. Measurements thermal comfort were made through techniques such as Black Globe and Humidity Index (BGHI), Thermal Heat Load (THL) Enthalpy (H). Conducted State University Goiás, during months April May, 2011, experiment composed five treatments: AC - Asbestos cement tiles, BA -Bamboo BAP Bamboo tiles painted white, FB -Vegetable fiber bitumen, FBP bitumen white. consisted 15...

This research was conducted aiming to evaluate the thermal behavior of metallic and fiber cement tiles installed in simple double layers.The experiment performed on prototypes roofing single layers double-spaced from 1.0 5.0 cm.It used temperature sensors, inner surface center model for data collection.Data were analyzed using Skott-Knott test, considering time day, roof type.The results showed that spacing between has an important influence gradient inside prototype, been observed roofs,...

Exposure to increasing concentrations of CO2 in the first 10 days incubation may have effects on development bird cardiac and respiratory organs. Moreover, age breeders can influence hatching performances. This study aimed investigate effect exposure morphophysiological digestive system embryos chicks from broiler aged 31 41 weeks. A total 860 fertile eggs Cobb strain were distributed a completely randomized design, 2 x factorial arrangement, with different gaseous environments (Control (C)...

Among the building materials used in rural facilities, roofs are noteworthy for being largely responsible thermal comfort, influencing balance within shelter. This study aimed to evaluate influence of roof on Enthalpy (H), Thermal Load Radiation (TLR), and Black Globe Temperature Humidity Index (BGHI) individual shelters dairy calves. The design was completely randomized with three treatments: Z - zinc tile, AC asbestos-cement tile ACW painted white upper side. averages were compared by...

In Tropical regions, the animal performance is often affected by climate conditions. This study aimed to evaluate covering materials in individual shelters, normally used house dairy calves, and its influence on calves physiology performance. The design was completely randomized, with a 2x3 factorial arrangement compare averages of 5% through Tukey's test, i.e., both genders- three types shelters (Z - zinc; AC asbestos cement; WPAC white-painted cement). Parameters evaluated included daily...

The pendulous crop is characterized by excessive distension of the musculature, compromising bird's productivity and welfare. etiology still unknown, but it believed that factors related to birds' handling might be its incidence. study was conducted in 2 environmental chambers. One maintained at a comfortable temperature, while other set much lower temperature. In each chamber, animals were divided into 16 experimental pens (8 received mash feed others pelletized feed) with density 12...

O objetivo do presente estudo foi aplicar o Indice de Tolerância ao Calor (ITC) em animais girolandos com dois grupos geneticos e validar seu uso para bovinos leiteiros. experimento inteiramente casualizado. Foram utilizadas 20 femeas da raca girolando, sendo 10 ½ sangue ⅝ consanguinidade. Foi aplicado ITC 3 dias nao consecutivos, qual consiste na mensuracao temperatura retal, antes apos a exposicao radiacao solar direta por uma hora. Houve diferenca estatistica significativa (P<0,05) pelo...

This study was developed with the objective of evaluating reflective paint on covering and artificial ventilation performance broilers (males females). A randomized design a 2 × factorial arrangement treatments used, as follows: external management systems (coverage without paint), internal (with ventilation) sexes (male female), totalizing 8 treatments. total 480 1-day old chicks Cobb strain were distributed randomly, according to sex, Each treatment consisted 4 pens - two for males females...

This study was developed in order to compare the thermal behavior of different types roofs by measuring External Surface Temperature (EST) and Internal (IST) over days. The experimental design completely randomized, with five treatments: AC - Asbestos cement tiles, BA -Bamboo BAP Bamboo tiles painted white, FB -Vegetable fiber bitumen, FBP bitumen 15 repetitions, being adopted as repetitions days measurement. temperature internal external roofing surfaces collected at 8:00 am, 10:00 12:00...

ABSTRACT High-production cows require facilities providing comfortable environments to enhance production efficiency and sustain milk quality. This study evaluated the impact of climatizing feeding area post-morning afternoon milking on environmental variables, thermal comfort indices, yield quality in lactating Girolando cows. The experiment followed a 4 × Latin square design with four treatments across experimental periods, using per treatment. post-milking climate control included:...