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Effect of a simulated heat wave in thermal and aerial environment broiler-rearing environment 70
Vale,Marcos M. do; Moura,Daniella J. de; Nääs,Irenilza de A.; Curi,Thayla M. R. C.; Lima,Karla A. O..
ABSTRACT Global warming increases the occurrence of events such as extreme heat waves. Research on thermal and air conditions affecting broiler-rearing environment are important to evaluate the animal welfare under extreme heat aiming mitigation measures. This study aimed at evaluating the effect of a simulated heat wave, in a climatic chamber, on the thermal and air environment of 42-day-old broilers. One hundred and sixty broilers were housed and reared for 42 days in a climatic chamber; the animals were divided into eight pens. Heat wave simulation was performed on the 42nd day, the period of great impact and data sampling. The analyzed variables were room and litter temperatures, relative humidity, concentrations of oxygen, carbon monoxide and ammonia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia; Gas production; Animal welfare; Oxygen; Litter temperature.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200271
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Effect of floor type (dirt or concrete) on litter quality, house environmental conditions, and performance of broilers 89
Abreu,VMN; Abreu,PG de; Jaenisch,FRF; Coldebella,A; Paiva,DP de.
This study was conducted with the objective of evaluating the use of concrete or hard-packed dirt floor in broiler houses. This experiment was carried out in two different phases. The following performance parameters were studied: live weight, feed intake, feed conversion ratio, and mortality. Litter moisture, pH and temperature were measured. Litter residual contamination after cleaning and disinfection was also evaluated. A dry bulb thermometer, a wet bulb thermometer, and a black bulb thermometer were placed inside each broiler house at bird height and outside the broiler house for data collection. Environmental data were collected at 3h intervals from 00:00 to 24:00 hours during weeks 4, 5, and 6 of the grow-out. Based on the collected data, air...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coliforms; Litter pH; Litter temperature; Live performance; Thermal comfort.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200007
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EFFECT OF LITTER SUBSTRATES ON THE PERFORMANCE, CARCASS TRAITS, AND ENVIRONMENTAL COMFORT OF RED-WINGED TINAMOU (RHYNCHOTUS RUFESCENS) 89
Nunes,JC; Carvalho,MM; Sugui,JK; Queiroz,FA; Santana,AE; Hata,ME; Aiura,ALO; Oliveira,JA; Queiroz,SA.
ABSTRACT The study aimed at evaluating the effect of litter substrates on the performance, carcass traits, and environmental comfort of red-winged tinamou (Rhynchotus rufescens). In this experiment, 160 birds, with 100 and 300 days of age, were housed into 20 pens, and distributed according to a completely randomized experimental design into five treatments with four replicates of eight birds each. Treatments consisted of five litter substrates: wood shavings, rice husks, peanut hulls, grass hay, or sand. Feed intake; weight gain; breast, hock, and footpad lesions; back feathering; total meat production; carcass and parts yield; and leukocyte counts were evaluated. Litter substrates were analyzed for dry matter content, standard microbial count, ammonia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Grass hay; Leukocyte counts; Litter temperature; Radiant heat load; Sand.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000500041
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Evaluation of litter material and ventilation systems in poultry production: III. litter reuse, darkling beetle populations and intestinal parasites 96
Abreu,Valéria Maria Nascimento; Paiva,Doralice Pedroso de; Abreu,Paulo Giovanni de; Coldebella,Arlei.
It was evaluated the quality of rice husks or soybean straw as litter substrate and the effect of litter reuse for four consecutive flocks of broiler chickens on populations of darkling beetle and intestinal parasite and as organic fertilizer. The experiment was carried out in four 12 m × 10 m poultry houses, internally divided in 4 boxes/poultry house with 200 birds/pen for four consecutive flocks, each flock with a duration of 42 days and with a 15-day downtime between flocks. The evaluated treatments were two ventilation systems (stationary or oscillating fans) and two litter materials (soybean straw or rice husks). Darkling beetle population was followed by collecting the insects in traps, three traps per box, and endoparasite litter contamination was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler chickens; Litter temperature; Oocysts; Organic fertilizer; Oscillating ventilation; Stationary ventilation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000600028
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