scholarly journals Performance of Nellore males under different artificial shading levels in the feedlot

2016 ◽  
Vol 37 (4Supl1) ◽  
pp. 2623
Author(s):  
Diogo Alves da Costa Ferro ◽  
Emmanuel Arnhold ◽  
Claudia Peixoto Bueno ◽  
Eliane Sayuri Miyagi ◽  
Rafael Alves da Costa Ferro ◽  
...  

The objective of this study was to evaluate the influence of artificial shading on weight gain and meat quality of male Nellore cattle in an intensive production system. The experiment was conducted in the experimental feedlot of the Course of Animal Science at Universidade Estadual de Goiás, from July to October 2014. Forty-eight male Nellore cattle with an average initial weight of 310 kg were kept in double 24-m2 stalls, in a total of 24 stalls. Of these, six were in the open air; six were covered with black shade netting of 30% light interception; six with black shade netting 50%; and six with black shade netting 80%, providing 6 m2 of shade per stall. The ration supplied to the animals and the orts left in the trough were weighed daily to determine intake, and the temperature-humidity index (THI) was measured twice weekly. Animals were weighed for the first time at the start of the experiment, and then another three times until the end, which was followed by the slaughter and assessments of performance and meat quality. A difference (p < 0.05) was observed between the average THI values, with the highest value found in the stalls without artificial shading. No difference (p > 0.05) was observed for feed intake, initial weight, final weight, total weight gain, average daily weight gain, carcass yield, marbling, texture, fatness, backfat thickness, loin-eye area, color, thigh length and circumference, leg length and circumference, or carcass length between the animals on the different treatments. The use of artificial shading does not have a significant effect on performance or meat quality of feedlot Nellore cattle when the ambient temperature is within the thermal comfort zone.

2019 ◽  
Vol 40 (4) ◽  
pp. 1681
Author(s):  
Wescley Faccini Augusto ◽  
Ubirajara Oliveira Bilego ◽  
Regis Luis Missio ◽  
Tiago Pereira Guimarães ◽  
Fabrícia Rocha Chaves Miotto ◽  
...  

The objective of this study was to evaluate the animal performance, carcass characteristics and meat quality of F1 Angus-Nellore steers and heifers, feedlot finished with high degree of subcutaneous fat deposition. The experimental design was completely randomized, with two treatments (steers and heifers) and 11 replicates (animals). Twenty-two bovines with initial age of 18 months of age, 11 steers and 11 heifers, with initial body weight of, respectively, 354.86±43,66 and 353.82±39,80 kg were used. The animals were finished in confinement (114 days) with a diet containing 200 g kg-1 of corn silage and 800 g kg-1 of concentrate composed mainly of corn grain and soybean meal. The dry matter intake (9.42 vs. 9.24 kg day-1), mean daily weight gain (1.44 vs. 1.38 kg day-1), feed conversion (6.49 vs. 7.05 kg of dry matter kg-1 of weight gain), hot carcass weight (284.62 vs. 268.16 kg) and the subcutaneous fat thickness (12.09 vs. 13.05 mm) were similar between steers and heifers (respectively). The hot carcass yield was higher (P < 0.05) for steers (58.14 vs. 55.53%). The steers presented a higher proportion of the forequarter (39.26 vs. 37.53%), while heifers had a higher proportion of pistol cut (49.87 vs. 48.85%). The meat of steers showed darker color (P < 0.05). The shear force of the meat and marbling score did not differ between sexual conditions, with mean values of 5.43 kgf cm-2 and 10.14 points (median), respectively. Except for the proportion of primary cuts, carcass yield and meat color, F1 Angus-Nellore heifers present similar animal performance, carcass and meat characteristics in relation to steers, feedlot finished with high degree of subcutaneous fat deposition.


2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 334-335
Author(s):  
Tamyres Amorim ◽  
Jessica Gemelli ◽  
Ingrid Fuzikawa ◽  
Taiane S Martins ◽  
Gabriella Moura ◽  
...  

Abstract The goal of this study was to evaluate the effect of contrasting growth rate in pre and post-weaning period on carcass traits and meat quality of feedlot Nellore cattle. To high weight gain, in pre and post-weaning period, were be considered management groups with mean weight gain above the third quartile of pre-weaning (PREW) or post-weaning (PROW) weight gain distribution of population to group of moderate gain were be considered management lots with daily average gains between the first and third quartiles of PREW or PROW weight gain distribution of population. In the low gain group will be considered management lots with daily average gains lower than the first quartile of PREW or PROW weight gain distribution of population. We used a total of 500 bulls, registered in the National Association of Breeders and Researchers, fed during 90 days with the same diet, confined and slaughtered. The PREW presented a weight gain rate (WGR) of 57.1, 67.3, and 77.7 kg for low, moderate and high WGR, respectively; and the PROW of 110.3, 113.4, and 119.4 kg for low, moderate and high WGR, respectively. The hot carcass weight influenced WGR in pre-weaning (297.56±11.80, 323.53±10.09, and 364.31±18.88 kg) for low, moderate and high, respectively (P = 0.03). The carcass dressing was affected by weaning period in WGR (pre-weaning: 54.18, 54.33, and 57.88 %; P = 0.034, and post-weaning 55.52, 56.23, and 54.66%; P = 0.471) for low, moderate and high WGR, respectively. The contrasting weight gain groups did not influence the marbling score in PREW (P = 0.128) and PROW (P = 0.772), back fat thickness in PREW (P = 0.719) and PROW (P = 0.833), ribeye area in PREW (P = 0.472) and PROW (P = 0.833), tenderness in PREW (P = 0.936) and PROW (P = 0.911). In general, the gain rate did not improve the carcass traits and meat quality of feedlot Nellore cattle.


2017 ◽  
Vol 5 (2) ◽  
pp. 74
Author(s):  
M. I. Okoruwa ◽  
D. O. Okunlola

This study was conducted to determine performance, carcass traits and meat quality evaluation of sheep fed napier grass and different proportion of cocoa pod husk and soursop pulp meals. Eighteen (18) West African Dwarf rams, aged between 7 and 8 months old with mean weight of 7.00 ± 0.55kg were allotted to three dietary treatments with two replicates of three sheep per treatment in a completely randomized design. The compared treatment diets were; TA (70% napier grass and 30% concentrate diet), TB (45% cocoa pod husk with 25% soursop pulp and 30% concentrate diet) and TC (50% cocoa pod husk with 20% soursop pulp and 30% concentrate diet). The experimental diets were given to the sheep at 6% of their body weight and the experiment lasted for 84days after 14days of adjustment period. The results showed that average daily feed intake (221.79g), nitrogen intake (18.02g/day), total nitrogen loss (5.08g/day) and chilling losses (12.85%) were significantly (P < 0.05) higher in diet TA compared with diets TB and TC. Treatment diet TC was significantly (P < 0.05) better in total body weight gain (3.66kg), average daily weight gain (43.57g), total digestible nutrient (74.69%), nitrogen retention (77.58%, slaughter weight (11.02kg), hot carcass weight (5.68kg), cold carcass yields (5.23kg), hot with cold carcass yields (51.54 and 47.46%), appearance (6.81), tenderness (6.20) and overall acceptability (6.85) than other treatment diets. Initial body weight, flavor and juiciness were not significantly (P > 0.05) affected by the treatment diets. It was concluded that 50% cocoa pod husk with 20% soursop pulp and 30% concentrate diet has the potential to enhance performance, carcass traits and meat quality evaluation in sheep.


2021 ◽  
Vol 29 (1-2) ◽  
pp. 21-28
Author(s):  
María Bettina Gómez ◽  
Melina Castillo

The ovine population of the central Argentine territory is the result of constant introductions of different animal biotypes, which determined the existence of ovine populations with great variability. The main objective of the breeders is to produce a lamb for self-consumption and sale of surpluses, without considering the wool product. The production of a lamb for the market is compatible with the production of wool for the textile industry, having to evaluate the feasibility for the commercialization of lamb wool that they produce. This work aimed to provide information and tools to evaluate the quality of lamb’s wool and the evolution of the weight of lambs belonging to the native flocks of the area. Characterization of the productive systems was carried out, seeking to highlight the attributes of meat and wool of native lambs. The characteristics of wool and meat lamb product were evaluated under two treatments, either in free rage conditions or lambs supplemented under confinement. The analysis of the behaviour of the productive systems did not show significant differences between lamb biotypes, which allows affirming that the variation within an animal biotype is even more important than the expected one between biotypes. This indicates that both treatments can be used according to the particular situation of each productive unit. Therefore, it is possible to produce wool and meat of outstanding quality looking for the goodness of the wool produced and optimizing through proper handling practices the meat product.


2020 ◽  
pp. 104348
Author(s):  
Mariane Beline ◽  
Juan Fernando Morales Gómez ◽  
Daniel Silva Antonelo ◽  
Juliana Silva ◽  
Vicente Luiz Macedo Buarque ◽  
...  

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2275
Author(s):  
Romina Rodríguez ◽  
Oscar Balocchi ◽  
Daniel Alomar ◽  
Rodrigo Morales

Under the predicted conditions of climate change, the productivity of temperate grasslands may be affected by drought stress, especially in spring and summer. In this scenario, water-deficit-tolerant species such as plantain and chicory are interesting alternatives for use in sheep production systems. In this study, we compared a mixture of plantain and chicory herbage (PCH) with a grass-based permanent sward (GBS) on the weight gain and meat quality of lambs finished on these grasslands. Fifteen weaned lambs (31.3 kg and 4 months of age) were assigned to each treatment for seven weeks in late spring and live weight gain (LWG), carcass and meat quality were evaluated. There was a tendency (p = 0.09) in final weight (40.3 ± 0.8 kg) and live weight gain (173 ± 10 g/d) to be higher in PCH compared to GBS. Carcass weight, dressing percentage and meat quality in terms of pH, color and tenderness did not differ (p > 0.05) and were considered to be of good quality. We concluded that both swards result in comparable lamb performance and good meat quality.


2020 ◽  
Vol 43 ◽  
pp. e50347
Author(s):  
Laís de Oliveira Lima ◽  
Vinícius Carneiro de Souza ◽  
Juliana Duarte Messana ◽  
Pablo de Souza Castagnino ◽  
Ana Rebeca Castro Lima ◽  
...  

This study evaluated the effect of phosphorus (P) supplementation on the intake, digestibility, and quality of aged meat from Nellore young bulls fed on high-grain diets finished in feedlot. Forty young bulls (30 months old) with an initial body weight (IBW) of 296 ± 25 kg were used. It was distributed in a completely randomized experimental design. The treatments were: without P supplementation (CO), commercial mineral supplement (CM), and supplementation with dicalcium phosphate (DP) with 2.4, 4.2, or 5.0 g of P per kg of dry matter (DM), respectively. Diets were composed of sugarcane bagasse (200 g kg-1) plus concentrate (800 g kg-1) on a dry matter (DM) basis. The meat quality parameters analyzed were pH, color, cooking losses, shear force, and water-holding capacity. P supplementation did not affect the intake and digestibility of nutrients There was no interaction (p > 0.05%) between diets and the aging time for the meat quality parameters. However, bulls fed with DP exhibited lower pH (5.98) compared to CO and CM (6.19 and 6.14, respectively). The longer aging time increased the cooking losses and intensity of yellow (b*). Under Brazilian conditions, feedlot Nellore cattle fed with high-grain diets do not require additional mineral supplements.


ZOOTEC ◽  
2020 ◽  
Vol 40 (2) ◽  
pp. 676
Author(s):  
Sintia Tempomona ◽  
Betty Bagau ◽  
Fenny R. Wolayan ◽  
Mursye N. Regar

EFFECT OF SUBTITUTION OF BASIC RATIONS WITH PAPAYA LEAF MEAL ON BROILER PERFORMANCE.  This research aims to know the effect of substitution of basic rations with papaya leaf meal on broiler performance. Using 100 broiler chickens aged 2 weeks with an initial weight rate of 278.75 g. The design used was complete random design (CRD) consisting of 4 treatments and 5 replications. The arrangement of the treatment was as follows: R0 = 100% basal ration (RB) + 0% papaya leaf meal (PLM), R1 = 95% basal ration + 5% PLM, R2 = 90% basal ration + 10% PLM, R3 = 85% basal ration + 15% PLM. The results of the analysis of variance showed that the replacement of a portion of basal rations with papaya leaf meal had a significantly different (P < 0.05) on feed intake, daily weight gain and feed conversion. Based on the results of this study, It can be concluded that the using of papaya leaf meal can replace a portion of ration until 5% level.Keywords: Performance, papaya leaf meal, broiler chickens


2021 ◽  
Vol 78 (2) ◽  
Author(s):  
Rickyn Alexander Jacinto-Valderrama ◽  
Guilherme Sicca Lopes Sampaio ◽  
Maria Lucia Pereira Lima ◽  
Joslaine Noely dos Santos Gonçalves Cyrillo ◽  
Sergio Bertelli Pflanzer

2021 ◽  
Vol 48 (3) ◽  
pp. 100-110
Author(s):  
J. S. Ekpo

The concern of people about nutritional quality and healthy eating make them to reduce meat consumption due to the fear of hypercholesterolemia. Against this background, there is need to incorporate cholesterol-reducing feed stuff into diets of meat producing animals. This study was therefore carried out to evaluate the performance as well as carcass quality of rabbits fed diets containing processed Mucuna seed meal (MSM) for 84 days. A total of 45 rabbit bucks (New Zealand White) of six weeks old were divided into three treatment groups of 15 rabbits each. Each treatment group was replicated thrice with five rabbits per replicate. The rabbit groups were randomly assigned to three treatment diets in a completely randomized design: The three experimental diets were formulated such that Mucuna pruriens seed (processed by soaking and boiling) replaced maize at 0, 20 and 30% as T1, T2 and T3 respectively. T1 served as the control without Mucuna Pruriens. Data were collected on feed intake, weight gain, feed conversion ratio, carcass traits and meat lipid profile viz: total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), very low density lipoprotein (VLDL) and high density lipoprotein (HDL). Result obtained revealed that rabbits on mucuna-based diets (T2 and T3) had significant (P<0.05) increase in feed intake and weight gain than rabbits on diet T1 (control). Similarly, carcass characteristics of the animals fed mucuna-based diets showed significant (P<0.05) increase in dressed weight, dressing percentage, cut parts (fore leg, hind leg, loin, thoracic cage) except organ (liver, kidney. heart, lungs) weights which were comparable to rabbits fed control diet. Significant (P<0.05) improvement in meat quality in terms of increase in HDL, protein, muscle, meat to bone ratio and reduction in TC, TG, LDL, VLDL and fat were obtained for the rabbit fed the mucuna-based diets. Economy of production indicated that cost of feed consumed and cost per weight gain reduced for rabbits fed MSM compared to those fed control diet. The results of the trial have shown that processed MSM can be used to substitute maize in diet up to 30% for improved performance, carcass traits and meat quality of rabbit bucks.     Les préoccupations des gens au sujet de la qualité nutritionnelle et d'une alimentation saine les font réduire la consommation de viande en raison de la crainte de l'hypercholestérolémie. Dans ce contexte, il est nécessaire d'incorporer des aliments pour animaux réducteurs de cholestérol dans les régimes alimentaires des animaux producteurs de viande. Cette étude a donc été réalisée pour évaluer la performance ainsi que la qualité de carcasse des lapins nourris à des régimes contenant des farines de graines de Mucuna transformées (le 'MSM') pendant 84 jours. Un total de 45 mâles de lapin (New Zealand White) de six semaines ont été divisés en trois groupes de traitement de 15 lapins chacun. Chaque groupe de traitement a été répliqué trois fois avec cinq lapins par réplique. Les groupes de lapins ont été assignés au hasard à trois régimes de traitement dans une conception complètement randomisée : Les trois régimes expérimentaux ont été formulés de telle sorte que les graines pruriens de Mucuna (traitées par trempage et ébullition) ont remplacé le maïs à 0, 20 et 30% comme T1, T2 et T3 respectivement. T1 a servi de contrôle sans Mucuna Pruriens. Des données ont été recueillies sur la consommation d'aliments pour animaux, le gain de poids, le rapport de conversion des aliments pour animaux, les traits de carcasse et le profil lipidique de la viande viz : cholestérol total (le 'TC'), triglycéride (le 'TG'), lipoprotéine de basse densité (le 'LDL'), lipoprotéine de très faible densité (le 'VLDL') et lipoprotéine de haute densité (le 'HDL'). Le résultat obtenu a révélé que les lapins qui suivreaient un régime à base de mucuna (T2 et T3) avaient une augmentation significative (P<0.05) de la consommation d'aliments pour animaux et du gain de poids que les lapins au régime T1 (contrôle). De même, les caractéristiques de carcasse des animaux nourris à base de mucuna ont montré une augmentation significative (P<0.05) du poids habillé, du pourcentage d'habillage, des parties coupées (jambe avant, patte arrière, longe, cage thoracique) à l'exception des poids des organes (foie, rein, cœur, poumons) comparables aux lapins nourris au régime de contrôle. Une amélioration significative (P<0.05) de la qualité de la viande en termes d'augmentation de la HDL, des protéines, des muscles, du rapport viande/os et de la réduction du TC, du TG, du LDL, du VLDL et de la graisse a été obtenue pour le lapin nourri aux régimes à base de mucuna. L'économie de production a indiqué que le coût des aliments consommés et le coût par gain de poids réduit pour les lapins nourris aux 'MSM' par rapport à ceux nourris régime de contrôle. Les résultats de l'essai ont montré que les 'MSM' transformés peuvent être utilisés pour remplacer le maïs dans l'alimentation jusqu'à 30 % par une meilleure performance, des caractéristiques de carcasse et la qualité de la viande des mâles lapins.


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