scholarly journals Carcass characteristics and organ proportions of broiler chickens fed different plant protein sources in an Acha grain-based diet

2021 ◽  
Vol 47 (6) ◽  
pp. 108-112
Author(s):  
D. N. Onunkwo ◽  
G. Daniel-Igwe ◽  
E. Afam-Ibezim ◽  
B. N. Ezenyilimba ◽  
I. U. Udokwu
Keyword(s):  
Broiler Chickens ◽  
Live Weight ◽  
Plant Protein ◽  
Broiler Chicks ◽  
Groundnut Cake ◽  
Poultry Products ◽  
Cashew Nut ◽  
Randomized Design ◽  
Plant Protein Sources ◽  
Negative Effect

The stiff competition between man and livestock for maize as energy feedstuff has resulted in the high cost of poultry products. Therefore, a study was conducted to evaluate the effect of feeding acha-based diet varying dietary plant protein to broiler chickens on carcass characteristic and organ proportions. A total of 120, one day-old Abor acre broiler chicks were used for the study in a Complete Randomized Design. Four dietary plant proteins were included in the broiler chicken diet at 28% level with an acha grain as the main energy source. Diet 1 contains 28% groundnut cake, while diets 2, 3 and 4 contain 28% of full fat soyabean, soyabean cake and cashew nut meal, respectively. The birds were randomly allotted to the 4 treatment groups, with each group having 30 birds which was further subdivided into 3 replicates of 10 birds each. This study lasted for 56 days. At the end of the feeding trial, carcass evaluation was carried out. One bird per replicate was randomly selected, starved overnight and slaughtered by severing the jugular vein. The visceral were removed and weighed. The results showed that birds fed dietary soyabean cake (Diet 3) had the highest live weight gain (2155.00g), slaughtered weight (1855.00g), defeathered weight (1838.33g), dressed weight (1455.00g) and shank (112.00g). The organ proportions showed significant differences (p<0.05), though followed no definite trend. In conclusion, birds fed diet 3 gave the best carcass weight, and the organ proportions showed no negative effect as par the diets offered the birds. Thus, inclusion of 28%, soyabean meal in an acha-grain based diets proved to be superior over groundnut cake and cashew nut and it is therefore recommended.   La vive concurrence entre l'homme et le bétail pour le maïs comme aliment énergétique a entraîné le coût élevé des produits de volaille. Par conséquent, une étude a été menée pour évaluer l'effet de l'alimentation à base d'acha avec des protéines végétales alimentaires variées sur les poulets de chair ainsi que les caractéristiques de la carcasse et les proportions des organes. Un total de 120 poussins de chair de 'Abor acre' âgés d'un jour a été utilisés pour l'étude dans un plan randomisé complet. Quatre protéines végétales diététiques ont été incluses dans le régime des poulets de chair à un taux de 28%, le grain d'acha étant la principale source d'énergie. Le régime 1 contient 28% de farine d'arachide, tandis que les régimes 2, 3 et 4 contiennent 28% de farine de soja, de gâteau de soja et de noix de cajou, respectivement. Les oiseaux ont été répartis au hasard dans les 4 groupes de traitement, chaque groupe comptant 30 oiseaux qui ont ensuite été subdivisés en 3 répétitions de 10 oiseaux chacun. Cette étude a duré 56 jours. À la fin de test d'alimentation, une évaluation de la carcasse a été effectuée. Un oiseau par réplique a été sélectionné au hasard, affamé pendant la nuit et abattu en sectionnant la veine jugulaire. Les viscéraux ont été prélevés et pesés. Les résultats ont montré que les oiseaux nourris avec du gâteau de soja diététique (régime 3) avaient le gain de poids vif (2155,00 g), le poids abattu (1855,00 g), le poids sans plumes (1838,33 g), le poids habillé (1455,00 g) et le jarret (112,00 g). Les proportions d'organes ont montré des différences significatives (p <0,05), mais n'ont suivi aucune tendance définie. En conclusion, les oiseaux nourris avec le régime 3 ont donné le meilleur poids de carcasse, et les proportions d'organes n'ont montré aucun effet négatif par rapport aux régimes offerts aux oiseaux. Ainsi, l'inclusion de 28% de gâteau de soja dans un régime à base de céréalesacha s'est avérée supérieure aux gâteau d'arachide et de noix de cajou et elle est donc recommandée.

scholarly journals Nutritional evaluation of differently processed plant protein sources on the performance of broiler chickens

2021 ◽  
Vol 6 (6) ◽  
pp. 195-201
Author(s):  
A. Maidala ◽  
◽  
G. Musa ◽  
L. Adamu ◽  
B. I. Amaza ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Block Design ◽  
Live Weight ◽  
Soya Bean ◽  
Plant Protein ◽  
Daily Weight Gain ◽  
Broiler Chicks ◽  
Protein Sources ◽  
Feed Cost ◽  
Plant Protein Sources

An eight-week feeding trial was conducted to assess four differently protein sources on performance of broiler chickens. Two hundred and fifty (250) day old unsex Anak 2000 broiler chicks were randomly allotted to four differently processed plant protein sources i.e. cooked soybean, salt treated African locust bean and sprouted Bambara nut with groundnut cake (GNC) based diet as control, the treatments were replicated five times (12 birds per replicate) in a Completely Randomized Block Design (CRBD). Results showed that daily feed intake, daily weight gain and feed conversion ratio were affected by different protein sources (p<0.05) at starter, finisher and overall phase. The carcass characteristics showed that live weight (1988-2160 g), slaughter weight (1610-1965 g) and plucked weight (1600-1814 g) were affected by different protein sources(p<0.05). The dressing percentage (83.31-86.25%) are not affected by different protein sources (p>0.05). The abdominal fat (0.61-0.64%), gizzard (1.61-1.77%), small intestine (40.80-43.20 cm) and large intestine (141.80-201.60 cm) were affected by the different protein sources (p<0.05). All the prime cuts were significantly (p<0.05) affected by the dietary protein sources. Total feed cost is highest in soya-bean based diet (N 379.30). The highest body weight (4.53 kg) is in soya bean-based diet. The feed cost per kg gain is highest in GNC based diet (N 158.34) and lowest in soya bean based diet (N 126.43). All the protein sources enhanced the growth performance of broiler chickens; however, soybean was more effective in enhancing the performance of broiler chickens.

Meat and Bone Characteristics of Broiler Chickens Fed Groundnut Cake-Based Diets as Affected by Graded Dietary Supplements of Crystalline L- Lysine and DL- Methionine

2016 ◽  
Vol 6 (1) ◽  
pp. 846-852
Author(s):  
Olugbenga Adeniran Ogunwole ◽  
B. C Majekodunmi ◽  
R. A Faboyede ◽  
D. Ogunsiji
Keyword(s):  
Amino Acid ◽  
Broiler Chickens ◽  
Bone Development ◽  
Thiobarbituric Acid ◽  
Broiler Chicks ◽  
Amino Acid Supplementation ◽  
Acid Supplementation ◽  
Groundnut Cake ◽  
Randomized Design ◽  
Phosphorus And Potassium

Effects of supplemental dietary lysine and methionine in a Groundnut Cake (GNC) based diets on meat and bone characteristics of broiler chickens were investigated. In a completely randomized design, a total of 168 one - day – old Arbor acre broiler chicks were randomly allocated to seven dietary treatments each in triplicate of eight birds per replicate. The Seven starter and finishers’ diets were: GNC based diets without any amino acid (lysine or methionine) supplementation (T1); GNC diet + 0.2% lysine (T2); GNC diet + 0.4% lysine (T3); GNC diet + 0.2% methionine (T4); GNC diet + 0.4% methionine (T5); GNC diet + 0.2 lysine and 0.2% methionine (T6) and GNC diet + 0.4% lysine and 0.4% methionine (T7). Experimental diets and water were offered to birds ad libitum in an experiment lasting six-week. At day 42, two birds per replicate were slaughtered, meat and bone characteristics determined. There were significant variations (P<0.05) in the crude protein (%) and ether extract (%), pH1 and pH2 of meat. Thiobarbituric acid reactive substances composition of meat at days 0, 5, and 10 were similar (P<0.05) and were not affected by dietary amino acid supplementation. Tibiotarsal index (mg/mm) of bone (22.10, 27.25, 33.35, 31.40, 28.70, 31.45 and 29.75 for broilers on T1, T2, T3, T4, T5, T6 and T7, respectively) were increased significantly (P<0.05) by amino acid supplementation. Significantly differences (P<0.05) were observed in the calcium, phosphorus and potassium (%) contents of broilers’ bone across treatments. Supplemental lysine and both lysine and methionine improved meat quality and bone development of broiler chickens in this study.

scholarly journals Effect of multienzymes + probiotic supplementation in fermented shea butter cake based diets on the carcass traits and the biochemistry of broiler chickens

2020 ◽  
Vol 12 (3) ◽  
pp. 227-233
Author(s):  
P.C. Aguihe ◽  
A.S. Kehinde ◽  
S.K. Halidu ◽  
A. Sulyman ◽  
J. Chikezie ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Live Weight ◽  
Serum Biochemistry ◽  
Positive Control ◽  
Serum Glucose ◽  
Negative Control ◽  
Shea Butter ◽  
Broiler Chicks ◽  
Breast Meat ◽  
Randomized Design

Abstract. This study aimed to evaluate the effect of multienzyme+probiotic (MEP) supplementation on carcass characteristics and serum biochemistry of broiler chickens fed fermented shea butter cake meal (FSBCM) based diets. A total of two hundred and sixty (260), 28-day-old broiler chicks were distributed into four treatments, with five replicates of 13 birds each using a completely randomized design and reared on deep litter system from 28 to 56 days of age. The four treatments were: positive control – T1 (corn-soybean based diet); negative control – T2 (20% FSBCM replacement for corn in T1); diet 3 – T3 (T2 diet + 0.05% MEP) and diet 4 – T4 (T2 diet + 0.10% MEP). On day 56, two birds per each pen were selected for carcass and organ evaluation and other two birds per replicate were selected for serum biochemical analysis. The results indicated that addition of MEP to FSBCM diet caused a significant (p<0.05) increase in live weight, dressing percentage and breast meat yield than FSBCM diet without MEP and did not differ from the T1 diet. The abdominal fat in birds fed MEP treated diets were significantly (p<0.05) lower than those groups fed PC and FSBCM diets. Serum glucose was similar (p>0.05) between birds fed PC and MEP treated diets but significantly (p<0.05) higher than those on FSBCM diet, whereas serum cholesterol, alanine aminotransferase and aspartate aminotransferase concentrations reduced significantly (p<0.05) in groups fed MEP supplemented FSBCM diets. All other parameters were not significantly (p>0.05) affected by the MEP supplementation. Therefore, MEP supplementation in FSBCM based diet improved live weights and carcass attributes without any detrimental effect on blood composition of the broiler chickens.

scholarly journals Carcass Traits, Organ Proportion and Bio-Economic Cost Benefits Analysis of Broiler Chickens Fed Different Dietary Plant Protein Sources In Sorghum-Based Diet

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
C. A. Agida ◽  
D. N. Onunkwo ◽  
B. N. Ezenyilimba ◽  
E. M. Afam-Ibezim ◽  
A. B. Ukonu ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Growth Parameters ◽  
Live Weight ◽  
Plant Protein ◽  
Average Weight ◽  
Gross Margin ◽  
Cost Benefits ◽  
Protein Sources ◽  
Plant Protein Sources ◽  
Carcass Parameters

A 56-day study was carried out to evaluate the carcass characteristics and organ proportions of broiler chickens fed sorghum-based diets with varying plant protein. A total of 120 day-old broiler chickens from a reputable and disease free farm were used for this study. There were four treatments, each having thirty broiler birds replicated thrice with ten broiler birds per replicate using a Completely Randomized Design (CRD). The broiler birds were offered feed and water ad libitum. The growth parameters were taken on weekly basis. Carcass evaluation was carried out at the end of the trial. One bird per replicate was randomly selected, fasted over-night and slaughtered by severing the jugular vein. After scalding in warm water for about a minute, the feathers were manually plucked, each bird was cut into parts for carcass evaluation. The relative weights of the cut parts were as a percentage of dressed weight. The internal organs, such as heart, kidney, gizzard/proventriculus were all weighed separately and recorded using electric micrometer (3000g weighing gauge). The findings from this study showed that all the carcass parameters considered showed significant differences (p<0.05). Birds fed diet 3 gave the best live weight, slaughtered weight, defeathered weight, dressed weight and commensurate cut-parts. Soybean (whether cake or full-fat) demonstrate superiority over groundnut cake and cashew nut cake. Birds fed diet 3 gave the highest value of thigh, breast -cut, drumstick and wings, while birds fed diets 2, 1 and 4 gave less. The organ proportions of broiler chickens fed different dietary plant sources have all the parameters significantly difference (p<0.05), except the lungs though without any definite pattern. Average weight gain and feed conversion ratio were better (p<0.05) among birds fed diet 2, and 3. Cost benefits analysis per kilogram in naira terms for birds fed different plant protein sources in a sorghum-based diets were significant (p<0.05) among treatment levels. Least cost per kg feed was obtained in diet 1 (p<0.05). Cost of weight gained was (p<0.05) low in T1. Cost of feed consumed was low for diet T1 and T3. Revenue, gross margin and cost benefit ratio estimated were found to high (p<0.05) among T2 and T3. Broiler chickens fed diet 3 gave the best parameters. The actual contributions of the experiment, is to alternatively replace corn with sorghum completely at least cost with optimum performance.

Growth performance and feed cost benefit of broiler chickens fed Acha grain-based diet supplemented with different plant protein sources

2021 ◽  
Vol 47 (6) ◽  
pp. 113-119
Author(s):  
D. N. Onunkwo ◽  
G. Daniel-Igwe ◽  
V. Odoemelam ◽  
C. A. Agida ◽  
B. N. Ezenyilimba
Keyword(s):  
Growth Performance ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Cost Benefit ◽  
Plant Protein ◽  
Poultry Feed ◽  
Cashew Nut ◽  
Feed Cost ◽  
Plant Protein Sources ◽  
Soyabean Meal

Conventional energy sources for poultry feed are scarce, expensive and highly competed for by man and industry in Nigeria which has resulted to subsequent high cost of feed and at times, poor quality of feed sold to farmers. Therefore, this study was carried out to evaluate the growth performance and feed cost benefit of broiler chickens fed various plant protein sources in acha grain based diet. A total of 120, one day-old Abor acre broiler chicks were procured and assigned in a Completely Randomized Design to four dietary treatments of three replicates and ten chicks per replicate. The four diets comprise soybean meal (full fat), soybean cake, groundnut cake and cashew nut meal at 28% inclusion level each in an acha based diet. Data on growth parameters (Daily feed intake, Final Weight Gain, Total Weight Gain, Feed-to-gain ratio and mortality) were collected daily and weekly. The results showed that the birds fed diet 3 having soyabean meal as the main plant protein source with 2700 Kcal/kg ME gave the best growth performance. It is also important to note that, the growth performance of birds fed diet 4 which had 28% cashew nut (full fat) had the poorest feed-togain ratio. The findings from this study further showed that using cashew nut (T4) as plant protein source in poultry (broiler chicken) ration is rather too expensive and production of cashew nut may have to increase so as to bring down the cost of production of broiler chicken. There was significant difference (P<0.05) in all the variables of feed cost benefit analysis. It is concluded that soyabean, whether used as meal/cake or full-fat confirmed its superiority over groundnut cake and cashew nut meal in this study. It is therefore recommended that farmers or poultry feed producers should use acha based diet with either soyabean meal or full-fat soyabean    Les sources d'énergie conventionnelles pour l'alimentation de la volaille sont rares, coûteuses et très concurrencées par l'homme et l'industrie au Nigéria, ce qui a résulté en un coût élevé des aliments et parfois, une mauvaise qualité des aliments vendus aux agriculteurs. Par conséquent, cette étude a été réalisée pour évaluer les performances de croissance et les avantages en termes de coûts d'alimentation des poulets de chair nourris  avec diverses sources de protéines végétales dans un régime à base de céréales acha. Un total de 120 poussins de chair Abor acre d'un jour ont été achetés et assignés dans une conception complètement aléatoire à quatre traitements diététiques de trois répétitions et dix poussins par répétition. Les quatre régimes comprennent la farine de soja (pleine matière grasse), le tourteau de soja, le tourteau d'arachide et la farine de noix de cajou à un taux d'inclusion de 28% chacun dans un régime alimentaire classique. Les données sur les paramètres de croissance (ingestion journalière, gain de poids final, gain de poids total, rapport alimentation / gain et mortalité) ont été collectées quotidiennement et hebdomadairement. Les résultats ont montré que les oiseaux nourris avec le régime 3 contenant de la farine de soja comme principale source de protéines végétales avec 2700 Kcal / kg ME ont donné les meilleures performances de croissance. Il est également important de noter que les performances de croissance des oiseaux nourris avec un régime alimentaire 4 contenant 28% de noix de cajou (gras) présentaient le rapport alimentation / gain le plus faible. Les résultats de cette étude ont en outre montré que l'utilisation de la noix de cajou (T4) comme source de protéines végétales dans la ration de volaille (poulet à griller) est plutôt trop coûteuse et que la production de noix de cajou peut devoir augmenter afin de réduire le coût de production du poulet à griller. . Il y avait une différence significative (P <0,05) dans toutes les variables de l'analyse coûts-avantages des aliments. Il est conclu que le soja, qu'il soit utilisé comme farine / tourteau ou gras entier, a confirmé sa supériorité sur le tourteau d'arachide et la farine de noix de cajou dans cette étude. Il est donc recommandé que les agriculteurs ou les producteurs d'aliments pour volaille utilisent un régime à base d'acha avec du tourteau de soja ou du soja entier.

scholarly journals Performance of starter broiler chickens fed diet supplemented with Smartchoice phytase enzyme

2020 ◽  
Vol 47 (2) ◽  
pp. 196-203
Author(s):  
O. A. Ekine ◽  
D. N. Onunkwo
Keyword(s):  
Weight Gain ◽  
Feed Intake ◽  
Broiler Chickens ◽  
Live Weight ◽  
Daily Weight Gain ◽  
Broiler Chicks ◽  
Feed Cost ◽  
Randomized Design ◽  
Total Weight Gain ◽  
Dietary Treatments

Phytase is essential for enhancing nutritional value of feed and improving animal growthperformance and health. A study was conducted to evaluate the influence of Smartchoicephytase enzyme supplementation in the diet of starter broiler chickens. A total of 150 Rossstrain broiler chicks were used for the study and allotted to five treatment groups of 30 birdseach. Each group was further divided into three replicates of 10 birds per replicate. Five isonitrogenous(21.40% CP) and iso-caloric (2975.40 kcal/kg ME) dietary treatments werecompounded to contain 0g/100kg (T ), 10g/100kg (T ), 15g/100kg (T ), 20g/100kg (T ) and 1 2 3 425g/100kg (T ) of a commercial Smartchoice phytase enzyme preparation for 28 days in a 5Completely Randomized Design (CRD). Feed and water were provided to the chicks adlibitum.Daily feed intake and weekly body weight were measured. The result showed that thedaily feed intake and daily protein intake were not affected (P>0.05) by Smartchoice phytaseenzyme supplementation. Final live weight, daily weight gain and total weight gain weresignificantly different among treatments. Protein efficiency ratio were significantly (P<0.05)higher in T (2.10) than T (1.80) but similar to T (2.05), T (2.05) and T (1.96). Feed 1 5 2 3 4conversion ratio was significantly (P<0.05) different in T5 (2.58) and T (2.02) but similar 1(P>0.05) in T (2.02), T (2.28), T (2.31) and T (2.38). Mortality was lowest in T5. Total feed 1 2 3 4cost per bird and daily feed cost per bird were not affected (P>0.05) by Smartchoice phytaseenzyme supplementation while cost per kg of feed and daily feed cost per bird were notsignificantly (P>0.05) affected. The findings from this study showed that Smartchoicephytase enzyme could be supplemented up to 20g per 100kg in the diet of starter broilerchickens.

scholarly journals Effect of replacement of soybean residues for groundnut cake on carcass yield of broiler chickens

2020 ◽  
Vol 36 (3) ◽  
pp. 317-327
Author(s):  
Haruna Abimiku ◽  
Comfort Tuleun ◽  
Oluwabiyi Oluremi ◽  
Elijah Faith
Keyword(s):  
Broiler Chickens ◽  
Control Diet ◽  
Carcass Characteristics ◽  
Experimental Treatment ◽  
Dietary Treatment ◽  
Broiler Chicks ◽  
Treatment Groups ◽  
Groundnut Cake ◽  
Soybean Residue ◽  
Randomized Design

A feeding trial was conducted with two hundred (200) Arbor Acre strain of broiler chicks to determine the effect of soybean residue (SBR) on carcass characteristics and visceral organs. Birds were fed for 28 days (starter phase) with formulated diet containing 22% crude protein and 3000Kcal/kg (ME). Five iso-nitrogenous experimental diets were formulated which contain SBR. In the control diet (T1) groundnut cake was served as the only protein source. Four (4) test diets designated as: T2, T3, T4 and T5 were formulated with SBR replacing 25, 50, 75 and 100% of groundnut cake respectively in finisher phase. The birds were randomly grouped into five (5) experimental treatment groups in four (4) replicates of 40 birds per treatment in a completely randomized design. The finisher phase lasted for five (5) weeks and the birds were fed and given drinking water adlibitum. All carcass characteristics evaluated differ significantly (P<0.05) among treatment groups except breast and wings. No significant (P>0.05) difference were shown for organs, while shanks was only the residue that was significantly affected by dietary treatment. Soybean residue can be used up to 100% to replace groundnut cake in the diet of broiler chickens thus providing a productive use for this hither to neglected agro allied waste.

Quality of the carcass and organs of chicken fed with two different insects meals

2018 ◽  
Vol 4 (4) ◽  
pp. 269-274
Author(s):  
M.I. Amobi ◽  
C.I. Ebenebe
Keyword(s):  
Broiler Chickens ◽  
Live Weight ◽  
Organ Weight ◽  
Poultry Feed ◽  
Source Control ◽  
Carcass Quality ◽  
Broiler Chicks ◽  
Major Protein ◽  
Feed Formulation ◽  
Dietary Treatments

The influence of insect protein origins on broiler chicken meat parameters were studied using 135 day old Arbor acre birds subjected to three dietary treatments: Diet A comprised of a standard feed of the brand name ‘vital feed’ containing fishmeal as the major protein source (control), while Diet B and Diet C contained insect meal from African palm weevil larvae (Rhynchophorus phoenicis), respectively, winged termite (Macrotermes bellicosus) as replacement for fishmeal. Forty five broiler chicks were randomly assigned to each of the dietary treatments at the rate of fifteen chicks per replicate making three replicates per treatment in a completely randomised design. The experiment lasted for eight weeks. During this period, the birds were housed in similar cages and subjected to similar husbandry and sanitation practices, such that the only source of variation was the dietary treatments. After eight weeks of the experiment, carcass quality and organ weight measurements were analysed using appropriate statistical analysis. The result obtained showed that the broiler chickens fed insect meals performed significantly (P<0.05) better in terms of live weight gain (2,200.85±64.23 g and 2,046±58.40 g for Diet B and Diet C) compared to control. Carcass quality relating to defeathered weight and eviscerated weight also followed a similar trend with Diet B (2,187.74±62.72 g and 1,788.93±70.70 g), Diet C (2,015.83±74.62 g and 1,466.97±100.05 g), and Diet A (control; 1,526.47±47.40 g and 1,240.30±64.53 g). The records of cut-up parts and organ weight measurements were also significantly different (P<0.05) for the birds on insect meal (Diet B and Diet C) than those on fishmeal based diet (Diet A). The result showed that insect meal can effectively serve as a major source of protein in poultry feed formulation.

scholarly journals Carcass characteristics of broilers fed enzyme complex

2015 ◽  
Vol 31 (2) ◽  
pp. 153-162 ◽  
Author(s):  
F.S. Dalólio ◽  
D.P. Vaz ◽  
J. Moreira ◽  
L.F.T. Albino ◽  
L.R. Valadares
Keyword(s):  
Meat Quality ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Broiler Chicks ◽  
Enzyme Complex ◽  
Carcass Yield ◽  
Randomized Design ◽  
Enzyme Supplementation ◽  
Water Holding

Enzyme supplementation in diets based on corn and soybean meal can improve the productive performance of broilers. Thus, we aimed to evaluate the effect of the inclusion of different levels of an enzyme complex consisting of phytase, protease, xylanase, ?-glucanase, cellulase, amylase, and pectinase, for diets based on corn and soybean meal, on the parameters of carcass yield and meat quality of broilers. Six hundred broiler chicks were used, and the animals were females with one day of age, from the Cobb 500 strain, and distributed in a completely randomized design, with five levels of inclusion of the enzyme complex (0, 100, 200, 300 and 400), and six repetitions, with twenty animals each. The carcass yield and meat quality were evaluated at 35 and 42 days of age. We evaluated the characteristics of weight loss by cooking (WLC), shear force (SF), water holding capacity (WHC), pH, lightness (L*) and color (a* and b*). The parameters of performance, carcass yield and carcass parts, and meat quality were not affected by the enzyme supplementation of diets fed to broiler chickens (P >0.05), except for the performance characteristics of the breast and the wings at 42 days of age (P < 0.05).

scholarly journals Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

2017 ◽  
Vol 38 (4Supl1) ◽  
pp. 2705
Author(s):  
Cleoneide Dos Santos Henrique ◽  
Andréia Fróes Galuci Oliveira ◽  
Thales Silva Ferreira ◽  
Eduardo Santos Silva ◽  
Bruna Finotti Fonseca Reis de Mello ◽  
...  
Keyword(s):  
Weight Gain ◽  
Feed Intake ◽  
Broiler Chickens ◽  
Bone Development ◽  
Stocking Density ◽  
Live Weight ◽  
Feed Conversion ◽  
Randomized Design ◽  
Total Phase ◽  
Completely Randomized Design

This study aimed to assess the effect of stocking density of 10, 12, 14, and 16 birds m?2 on performance, carcass and cut yields, productivity, and bone development of broiler chickens Cobb 500®. The experimental design was completely randomized design with four treatments (stocking densities) and four replications. The assessments were performed weekly at 1, 7, 14, 21, 28, 35, and 42 days. The best live weight result was found at a density of 10 birds m?2 in the period from 1 to 7 days. No effect of density was observed on feed intake and weight gain. From 1 to 14 days, the best live weights were found at densities of 10, 12, and 14 birds m?2, in addition to a higher feed intake at densities of 10 and 12 birds m?2. Weight gain was better at a density of 10 birds m?2, showing no differences from densities of 12 and 14 birds m?2. In the period from 1 to 21 days, live weight and weight gain were higher at densities of 10, 12, and 14 birds m?2. The highest feed intake was observed at a density of 10 birds m?2, which showed no difference from the density of 14 birds m?2. A difference (P < 0.05) was observed for live weight, weight gain, and feed intake of animals reared at densities of 10, 12, and 14 birds m?2 for the phases from 1 to 35 days and the total phase from 1 to 42 days of bird age when compared to 16 birds m?2, which presented lower performance. However, feed conversion of 1-7, 1-14, 1-21, 1-35, and 1-42 days and carcass and cut characteristics showed no significant differences for all treatments. On the other hand, productivity was higher in the treatments with 14 and 16 birds m?2, but without difference between each other. No interaction (P > 0.05) was observed between stocking density and age for the assessed bone parameters. Similarly, no difference (P > 0.05) was observed for bone development of broiler chickens reared at different stocking densities for the studied parameters. Thus, the increased density of 10 or 12 birds m?2 to 14 birds m?2 has no influence on zootechnical performance, carcass and cut yields, and bone development, but increases broiler chicken productivity reared in a conventional shed without air conditioning.

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