The effect of age and energy level on the growth potential of Sangsary male lambs in Iran

1996 ◽  
Vol 1996 ◽  
pp. 173-173
Author(s):  
Y. Rouzbehan ◽  
A. Shabani ◽  
R. Assadi Moghadam ◽  
A. Nik-khah

Recognition of the importance of the native sheep breeds as one of the main source of meat in Iran has led to several studies on their growth performance. There is little information available on the animal potential of Sangsary sheep, a native Iranian breed. The aim of this trial, therefore, was to assess the growth potential and carcass quality of Sangsary male lambs.Forty four entire males, 9 month (m.) old, mean initial weight 26.8 (sd 2.5) kg were used. The two diets, which consisted of concentrate and roughage, had a similar protein content (150 g CP/kg DM) and metabofisable energy of either 10.6 MJ/kg DM (diet A) or 9.2 MJ/kg DM (diet B), were each fed ad libitum to 22 lambs. The animals were group penned. At the start and end of the study, the animals were weighed on two consecutive days.

1996 ◽  
Vol 1996 ◽  
pp. 173-173 ◽  
Author(s):  
Y. Rouzbehan ◽  
A. Shabani ◽  
R. Assadi Moghadam ◽  
A. Nik-khah

Recognition of the importance of the native sheep breeds as one of the main source of meat in Iran has led to several studies on their growth performance. There is little information available on the animal potential of Sangsary sheep, a native Iranian breed. The aim of this trial, therefore, was to assess the growth potential and carcass quality of Sangsary male lambs.Forty four entire males, 9 month (m.) old, mean initial weight 26.8 (sd 2.5) kg were used. The two diets, which consisted of concentrate and roughage, had a similar protein content (150 g CP/kg DM) and metabofisable energy of either 10.6 MJ/kg DM (diet A) or 9.2 MJ/kg DM (diet B), were each fed ad libitum to 22 lambs. The animals were group penned. At the start and end of the study, the animals were weighed on two consecutive days.


2005 ◽  
Vol 60 (3) ◽  
pp. 267-271 ◽  
Author(s):  
N.E.J. Kashan ◽  
G.H. Manafi Azar ◽  
A. Afzalzadeh ◽  
A. Salehi

Author(s):  
S.A. Chadd ◽  
D.J.A. Cole

There have been a number of reports that voluntary feed intake (VFI) of modern pig genotypes may be the limitation to their growth performance. It has been suggested that selection for leanness (Fowler et al. 1976) and breeding for faster growth may have reduced appetite.In addition there is only limited information about the effect on VFI, performance and carcass characteristics of pigs fed ad libitum to liveweights greater than 100kg. A study was therefore undertaken to compare VFI and energy intake of improved genotypes with predicted intakes based on earlier genotypes (ARC, 1981). The associated effects on performance and carcass characteristics at heavier slaughter weights were also studied.


1999 ◽  
Vol 1999 ◽  
pp. 112-112
Author(s):  
Y. Rouzbehan ◽  
A. Shabani ◽  
R. Assadi Moghadam ◽  
A. Nik-khah

A study was undertaken to evaluate the performance of male and female of Sangsary sheep, a native Iranian breed. Rouzbehan et al. (1996) detailed the growth rate and body composition of male lamb of this breed. In this summary, the production potential and carcass characteristics of female lamb were reported.Forty four 9 month (m) old female lambs, mean initial weight 22.9 kg (±2.5) were used. The two diets, which consisted of concentrae and roughage, had a similar protein content (150 g/ CP/kg DM) and metabolisable energy of either 10.6 MJ/ kg DM (diet A) or 9.2 MJ/kg DM (diet B) were each fed ad libitum to 22 lambs. The animals were grouply penned. At the start and end of the study, the animals were weighed on two consecutive days. Throughout the study, live weight gain (LWG) and dry matter intake (DMI) were recorded weekly.


2021 ◽  
Vol 48 (1) ◽  
pp. 142-151
Author(s):  
L. T. Egbeyale ◽  
O. Uza ◽  
A. A. Ayoola ◽  
R. A. Sobayo ◽  
O. O. Adeleye ◽  
...  

This study was conducted to determine the effect of neem leaf infusion on growth parameters, carcass characteristics and meat quality of broiler chicken. One hundred and sixty, seven days old broiler chicks of cob strain were used for the experiment which was laid out in a completely randomized design (CRD). Each group was sub-divided into four replicates of 10 birds. The chicks in group 1 served as control and antibiotics were administered to them while 0.1, 0.2 and 0.3% concentration of neem leaf infusion were administered to bird on groups 2, 3 and 4, respectively. The period of experiment was six weeks. The birds were fed ad libitum. One bird close to average final weight was selected randomly in each replicate and was slaughtered at 42nd day of the experiment. Meat samples from breast muscle of the bird were subjected to cooking weight loss, refrigeration weight loss and sensory evaluation. The data obtained were subjected to one-way Analysis of Variance. Results revealed that there were no significant (p>0.05) effects of neem leaf infusion on weight gain and feed conversion ratio while water intake was influenced (p<0.05) at the starter phase across the treatment groups. It was only feed intake that was influenced (P<0.05) by the Neem leaf infusion (NLI) at the finisher phase. The heart was the only parameter that was significantly (p<0.05) affected among the carcass parameters. The cooking loss increased (P<0.05) with higher concentration of the infusion while refrigeration weight loss percentages were similar (P>0.05) across the treatments. The result on Sensory evaluation showed that only colour, tenderness and overall flavour were significantly (P<0.05) influenced. The study concluded that administration of aqueous Neem (Azadirachta indica) leaf infusion in drinking water of broiler chicken as alternative to antibiotics did not pose any adverse threat on the performance and meat quality of broiler chicken.     Cette étude a été menée pour déterminer l'effet de l'infusion de feuilles de neem sur les paramètres de croissance, les caractéristiques de la carcasse et la qualité de la viande du Effect of neem (Azadirachta indica) leaves infusion on growth performance and carcass quality of broiler chickens  poulet de gril. Cent soixante poussins de poulet à griller de sept jours de souche d'épi ont été utilisés pour l'expérience qui a été présenté dans une conception complètement randomisée (le 'CRD'). Chaque groupe a été subdivisé en quatre répliques de 10 oiseaux. Les poussins du groupe 1 ont servi de contrôle et des antibiotiques leur ont été administrés tandis que 0,1, 0,2 et 0,3 % de concentration d'infusion de feuilles de neem ont été administrés à l'oiseau sur les groupes 2, 3 et 4, respectivement. La période d'expérience était de six semaines. Les oiseaux ont été nourris ad libitum. Un oiseau dont le poids final est proche de la moyenne a été sélectionné au hasard dans chaque réplique et a été abattu au 42e jour de l'expérience. Des échantillons de viande prélevés sur le muscle mammaire de l'oiseau ont été soumis à la perte de poids de la cuisson, à la perte de poids de réfrigération et à l'évaluation sensorielle. Les données obtenues ont fait l'objet d'une analyse à sens unique de la variance. Les résultats ont révélé qu'il n'y avait pas d'effets significatifs (p>0,05) de l'infusion de feuilles de neem sur le gain de poids et le rapport de conversion des aliments pour animaux, tandis que la prise d'eau a été influencée (p<0,05) à la phase de démarrage dans tous les groupes de traitement. Ce n'est que la prise d'aliments qui a été influencée (P<0,05) par l'infusion de feuilles neem (NLI) à la phase finale. Le cœur était le seul paramètre qui était significativement (p<0,05) affecté parmi les paramètres de la carcasse. La perte de cuisson a augmenté (P<0,05) avec une concentration plus élevée de l'infusion tandis que les pourcentages de perte de poids de réfrigération étaient similaires (P>0,05) à travers les traitements. Le résultat de l'évaluation sensorielle a montré que seules la couleur, la tendresse et la saveur globale étaient significativement influencées (P<0,05). L'étude a conclu que l'administration de feuilles de neem (Azadirachta indica) dans l'eau potable du poulet de gril comme alternatif aux antibiotiques ne posait aucune menace négative sur la performance et la qualité de la viande du poulet de gril.


Author(s):  
Angela Cividini ◽  
Dušan Terčič ◽  
Mojca Simčič

The aim of this study was to estimate the effect of feeding system on the growth rate and carcass quality of crossbred Improved Jezersko-Solčava x Texel (JSRT) lambs and to evaluate the effect of sex on these traits. The trial was conducted in nature according to the traditional rearing systems. The trial included 44 crossbred lambs, which were born and reared until the slaughter in three different flocks. In the age of 10 days suckled lambs were offered with ad libitum corresponding diets according to the feeding system. All lambs were slaughtered in seven consecutive days by the same procedure. The effect of feeding system significantly affected daily gain from birth to slaughter, EUROP carcass conformation and shoulder width. Likewise, the effect of sex significantly affected daily gain from birth to slaughter and internal fatness of carcasses. According to carcass cuts the feeding system significantly affected only the proportion of neck and leg. Considering meat quality traits, feeding system had a significant effect on the pH 45 and CIE a* values. In this study, we could speculate that more than the feeding system the growth and the carcass traits as well as meat traits were affected by the amount of the supplement.


1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.


2020 ◽  
Vol 44 (2) ◽  
pp. 223-229
Author(s):  
S. B. Akinleye ◽  
A. B. Omojola ◽  
U. A. Offong ◽  
K. D. Afolabi ◽  
J. S. Luka

Fattening of farm animals is a way of increasing the rate of meat deposit after maturity. Its effectiveness depends on genetic status of the animal and the diet fed to the animal. In this study, performance and carcass evaluation of balami rams finished on diets with varying energy levels were carried. Forty-eight rams of Balami breed, weighing 20.75±1.50- 22.50±1.91kg were randomly alloted to four dietary energy levels (EL): 2.20Mcal/kg (EL ), I 2.40 Mcal/kg ((EL ), 2.60 Mcal/kg ((EL ) and 2.80 Mcal/kg ((EL ) for 90 days. The feed II III IV intake and daily weight gain of the animals in each treatment were determined and the average recorded. Three Balami rams were randomly selected from each treatment and sacrificed to determine the dressing percentage (DP), carcass weight (CW), fat deposit (FD) and meat yield (MY). Data were analysed using descriptive statistics and ANOVA at á . The 0.05 FBW (kg) of Balami rams in group EL , EL , EL and EL were 41.88.6±1.97, 42.12±1.84, I II III IV 46.13±1.65 and 52.24±2.50 while the FCR of animals on treatments EL (5.3±0.28) and EL I II (5.2±0.26) were higher than EL (4.7±0.82) and EL (4.0±0.65). The DP (%) were 54.9, III IV 54.9, 55.8 and 56.1, the FD (%) were 9.00,9.59,8.92 and 11.46 and the MY (%) were 75.2, 74.7, 75.5 and 72.0 for rams on EL , EL , EL and EL The results indicate that, increasing I II III IV. levels of energy improved growth performance and carcass quality of Balami rams. Therefore, higher level of dietary energy (2.80 Mcal/kgDM and 14% CP) could be suggested for optimizing growth performance and meat quality of Balami ram under fattening condition.


1954 ◽  
Vol 13 (4) ◽  
pp. 817-825 ◽  
Author(s):  
Earle W. Klosterman ◽  
L. E. Kunkle ◽  
Paul Gerlaugh ◽  
V. R. Cahill

1999 ◽  
Vol 1999 ◽  
pp. 224-224
Author(s):  
Y. Rouzbehan ◽  
A. Shadmanesh ◽  
N. Debiri ◽  
M. Eslami

Recently ,there is an incrase interest in fattening camals in Iran .This trial aimed to define the influence of dietary energy and protein levels on performance and carcass quality of camels in khorasan province.For 80 days, nine diets with three metaboliseble energy 10.9, 8.8 or 7.6 MJ /kg DM and three crude protein levels 140, 120, or 100 g/kg DM were offerd ad lib to thirty six camels (mean initial weight 183 kg ± 7.7) , where each treatment were randomly allocated to four animals, that were housed individually. Food intakes were recorded daily. Throughout the trial , all animals were weighed at fortnightly intervals. At the end of the project ,two animals from each treatment were slaughtered and carcass quality were determined. Data were analysed as a 3x3 factorial Anova, with energy and protein were the main effects.


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