scholarly journals Efeito do sulfato de alumínio e da taxa de lotação sobre o desempenho e características de carcaça de frangos de corte / Aluminum sulfate and stocking density effects on live performance and carcass characteristics of broiler chicks

2021 ◽  
Vol 4 (4) ◽  
pp. 6190-6201
Author(s):  
Joyce de Jesus Mangini Furlan ◽  
Lenise de Freitas Mueller ◽  
Adrielle Matias Ferrinho ◽  
Maísa de Lourdes do Nascimento Furlan ◽  
Mariana Zanata ◽  
...  
Keyword(s):  
Aluminum Sulfate ◽  
Stocking Density ◽  
Carcass Characteristics ◽  
Broiler Chicks ◽  
Live Performance ◽  
Density Effects ◽  
E 600

O objetivo deste estudo foi avaliar os efeitos de diferentes doses do aditivo acidificante (sulfato de alumínio) - [0, 200, 400 e 600 g/m2] no tratamento da cama aviária e da densidade de alojamento (8 e 9 aves/m2) sobre o desempenho zootécnico e características de carcaça de frangos de corte. Foram utilizados 532 pintos machos de um dia de idade, com peso inicial médio de 46 g ± 2,3. As aves foramdistribuídas em delineamento inteiramente casualizado e arranjo de tratamento em fatorial 4x2, com sete repetições. Além do desempenho também foram avaliadoso rendimento de carcaça edos cortes (peito, coxa e sobrecoxa), bem como a prevalência de lesão nos pés das aves. A análise dos dados foi realizada utilizando o procedimento MIXED do programa estatístico SAS® (versão 9.2). O uso doaditivo e a densidade de alojamento não interagiram sobre desempenho de frangos de corte. Em geral, o aumento da densidade afetou negativamente o ganho de peso e a conversão alimentar. A dose do aditivo e a densidade de alojamento interagiram para o rendimento de carcaça. O aumento da dose do aditivo diminuiu o rendimento de carcaça, quando a densidade foi de 9 aves/m2. Em conclusão com base na densidade de alojamento e usando derivações da equação de superfície, foi possível recomendar a adição de 193,22 g do aditivo acidificante por m2. Portanto, a dose ótima de inclusão de sulfato de alumínio que favoreceu aumento do rendimento de carcaça é igual a (Y = 78,013 + 0,0114x - 0,00002952x2).

scholarly journals Effects of voluntary removal of ractopamine hydrochloride (Optaflexx) on live performance and carcass characteristics of beef steers

2021 ◽  
Author(s):  
P J Rincker ◽  
J B Allen ◽  
M Edmonds ◽  
M S Brown ◽  
J C Kube
Keyword(s):  
Dry Matter ◽  
Carcass Characteristics ◽  
Carcass Weight ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Live Performance ◽  
Meet Residue ◽  
Ractopamine Hydrochloride ◽  
The Impact ◽  
Linear Manner

Abstract There is a lack of consistency across the globe in how countries establish tissue ractopamine residue limits and which residue limits are applied to various tissues, particularly for edible noncarcass tissues. Therefore, some US beef slaughter organizations have recommended a 48-h voluntary removal of ractopamine before slaughter in order to meet residue requirements of specific export countries and maintain international trade. Our objective was to assess the impact of voluntary removal of ractopamine hydrochloride (Optaflexx®; Elanco, Greenfield, IN) up to 8 d before slaughter on growth performance and carcass characteristics. Crossbred beef steers (60 pens of 10 animals/pen) with an initial shrunk body weight (BW) of 611.8 ± 10 kg SEM were fed one of six treatments over 42 d. Treatments included a control that did not receive ractopamine, on-label use of ractopamine (0-d withdrawal), and 2, 4, 6, or 8 d of voluntary removal of ractopamine from feed before slaughter. The start of ractopamine feeding (30.1 mg/kg of diet dry matter for 32 d) was staggered so that blocks could be slaughtered on the same day. Dry matter intake was decreased by 0.5 kg/d when ractopamine was fed with a 0-d withdrawal (P = 0.04) compared to the control, but was not altered (P = 0.56) as the duration of ractopamine removal increased from 0 to 8 d. Final BW, total BW gain, and average daily BW gain were increased by feeding ractopamine with a 0-d withdrawal (P = 0.09) compared to the control, but these variables decreased in a linear manner (P = 0.10) as the duration of removal increased from 0 to 8 d. Gain efficiency was improved by 15% (P < 0.01) by feeding ractopamine with a 0-d withdrawal compared to the control, and gain efficiency decreased linearly (P = 0.06) as the duration of ractopamine removal increased. Approximately 2/3 of the increase in gain efficiency remained after 8 d of removal. Hot carcass weight was increased by 6 kg (P = 0.02) by feeding ractopamine with a 0-d withdrawal compared to the control. Measured carcass characteristics were not altered by ractopamine feeding or by removal before slaughter (P ≥ 0.24). The consequences of voluntary removal of ractopamine up to 8 d before slaughter were a linear decrease in live BW gain (0.64 kg/d), poorer gain efficiency, and numerically lighter carcass weight.

EFFECTS OF DIETARY COMPOSITION ON THE RELATIVE PERFORMANCE AND CARCASS CHARACTERISTICS OF MALE AND FEMALE PIGS FED FROM 25 KG TO 92 KG LIVEWEIGHT

1976 ◽  
Vol 56 (3) ◽  
pp. 439-450
Author(s):  
A. G. CASTELL ◽  
D. T. SPURR
Keyword(s):  
Carcass Characteristics ◽  
Sole Source ◽  
Relative Performance ◽  
Restricted Feeding ◽  
Finishing Pigs ◽  
Live Performance ◽  
Feed Conversion ◽  
Protein Levels ◽  
Satisfactory Performance ◽  
Field Peas

One hundred and twenty-four feeder pigs, representing two breed groups (Hampshire × Yorkshire and Yorkshire) were used in three experiments to compare the live performance and carcass characteristics of boars, barrows and gilts fed, from 25 to 92 kg, a 16% protein, barley–soybean meal diet or diets based on a utility grade, soft wheat (Triticum aestivum cv. Pitic 62) with 0, 7½ and 15% field peas (Pisum sativum cv. Century) to provide total protein levels of 13, 14 or 15%. Under conditions of adequate nutrition, boars were superior to barrows in efficiency of feed conversion and estimates of carcass leanness, while gilts were intermediate in feed conversion and equivalent to boars in carcass indices. The amount and composition of the diet consumed had a greater effect upon the relative performance of boars and, to a lesser extent, of gilts than was observed with barrows. In addition, the dressing percentage was consistently lower with boars than with barrows or gilts. Sexual odor or taint was not noticeably present in the carcasses at the packing plant, although there was a tendency for meat from boars on restricted feeding to have a higher moisture and darker lean than that present in carcasses from barrows and gilts. The results also suggested that satisfactory performance of growing–finishing pigs could be achieved with diets based on Pitic 62 wheat using field peas as the sole source of supplementary protein.

scholarly journals Effect of Stocking Density on the Performance and Immunity of 1- to 14-d- Old Broiler Chicks

2016 ◽  
Vol 18 (4) ◽  
pp. 683-692 ◽  
Author(s):  
M Qaid ◽  
H Albatshan ◽  
T Shafey ◽  
E Hussein ◽  
AM Abudabos
Keyword(s):  
Stocking Density ◽  
Broiler Chicks

scholarly journals Effect of Direct-Fed Microbial Supplementation on Pathogenic <i>Escherichia coli</i> Fecal Shedding, Live Performance, and Carcass Characteristics in Feedlot Steers

2020 ◽  
Vol 10 (04) ◽  
pp. 683-705
Author(s):  
Alex Thompson ◽  
M. Alexandra Calle ◽  
Flavio R. Ribeiro ◽  
Ansen R. Pond ◽  
Wanda M. Kreikemeier ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Carcass Characteristics ◽  
Live Performance ◽  
Fecal Shedding ◽  
Feedlot Steers

scholarly journals The Effect of Replacing Dried Meal Worm with Soybean Meal on Growth Performance and Carcass Characteristics of Broiler Chickens

2021 ◽  
Author(s):  
Navid Naderi Boroojerdi ◽  
Mostafa Rajabzadeh
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Relative Weight ◽  
Carcass Characteristics ◽  
Basal Diet ◽  
Control Treatment ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Significant Difference

Abstract An experiment was conducted on 240 one-day old male (Ross308) chicken to the effect of substitution of dried mealworm (Tenebrio molitor) with soybean meal on growth performance and carcass characteristics broiler chicks. Chicks fed in a completely randomized design with 4 replicate cages (12 birds per cage). Five dietary treatments used: 1- Control treatment: Basal diet based on corn-soybean meal without adding dried mealworm, 2- Replacement of 5% dried mealworm with soybean meal in the base diet, 3- Replacement of 10% dried mealworm with soybean meal in the base diet, 4- Replacement of 15% dried mealworm with soybean meal in the base diet and 5- Replacement of 20% dried mealworm with soybean meal in the base diet. The results of the experiment showed that 3rd and 4th treatments with a substitution of 10 and 15 percent showed a higher mean weight gain and a daily gain, but their feed intake was lower comparing other treatments, and finally, the feed conversion ratio showed a significant decrease with respect to control treatment using these replacement levels. At 21 and 42 days of age, carcass yield and relative weight of the breasts showed significant increases in treatments 3 and 4, and other characteristics of chicken carcasses were not affected by the test treatments. The experiment showed that replacing soybean meal with 10% and 15% worm powder significantly improved the performance of broiler chickens, but no significant difference was found between the two levels.

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