Comparative Growth Performance Of Different Broilers Strains
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Publisher: 2007 Dissertation note: This present study was performed to investigate the comparative growth performance of different broiler strains. The experimental birds from four different strains viz Arbor acre (AA), Hubbard (RB), Hybro (FlY), and Starbro (ST) were randomly divided into 4 treatment groups each having 14 birds to evaluate the best performing strain under the local environmental condition. All the chicks in each replicate were weighed and placed in individual litter floor pens with the provision of separate feeding and drinking equipment. Ad. Libitum feed and water was offered to the birds in each replicate with the provision of 24hours light. Commercial broiler starter feed was provided from 0-4 weeks and finisher from 5-6 weeks of age.
Room temperature and humidity percentage was recorded daily. Body weight, feed intake were recorded weekly. FCR was also calculated on weekly basis. And mortality was recorded as and when occurred.
At the end of the experiment two birds' one male and one female from each replicate were randomly selected to study slaughter parameters such as live weight, dressed weight and different organs weight (shank length, head weight, liver weight, gizzard weight, heart weight, intestine weight, intestine length, ceacal weight).
The daily temperature range was 24 C to 40 C and the humidity percentage was from 20 to 90 % throughout the experimental period. The overall data showed no significant difference (P<0.05) in weight gain, feed consumption and FCR values of four different broiler strains. However, consistently higher weight gain and feed consumption was observed in birds of strains AA. Where as comparable FCR values were
observed in birds of strains AA, RB and HY. However birds in strains SB showed lowest (P>0.05) weight gain and highest FCR.
Significant differences (P<0.05) were observed in live weight of male and female birds. Highest (P<0.05) live weight and dressed weight was observed in birds of SB strain. The highest dressing percentage was observed in birds of AA and HY strains.
The significant differences (P<0.05) were observed in head weight of female birds from different broiler strains, the head weight of the birds from HB was significantly (P< 0.05) higher compared to lower weight of AA. The significant difference (P<0.05) was observed in shank length of female of the group AA birds. There was no significance difference (P> 0.05) in the liver weight, gizzard weight, intestinal weight, intestinal length, and ceacal weight of birds from different broiler strains.
The trial indicated that all the broiler strains such as Arbor acre (AA), Hubbard (RB), Hybro (HY), and Starbro (SB) can be reared profitably and uniformly under our local environmental temperature. It is also evident from the data that each strain has its own peculiar characteristics. AA, I-lB. and MY showed better growth performance, whereas maximum mortality was observed in the birds of SB thus indicating poor resistance to the diseases.
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Comparative Hatching Traits Of Different Broiler Strains
Material type: Book ; Format:
Publisher: 2007 Dissertation note: Poultry industry of Pakistan contributes a large segment to the national economy with an investment of more than 70 billions of rupees and has become the second largest industry after textile in Pakistan. The present project is designed to study the comparative hatching traits of different broiler strains. There are many commercial poultry companies that rear parent stocks consisting of different broiler parent strains of Hubbard, Hybro, Starbro, Arbor Acres. This sector is presently showing an annual growth rate of about 10-15 percent per annum and playing a vital role in narrowing down the gap between supply and requirement of animal protein foods. The present project is designed to study the comparative hatching traits of different broiler strains Hubbard, Hybro, Starbro, Arbor Acres.
A total of 600 eggs comprising 150 each of the 4 broiler breeder strains viz. Hubbard, Hybro, Starbro and Arbor acres were purchased from local companies maintaining parent breeder flocks. These eggs were divided into three replicates having 50 eggs of each. All the eggs were examined on the basis of their size, shape and shell texture for the selection of settable eggs in each replicate. All eggs were weighed and coded and 3 eggs from each replicate were taken for measuring the egg quality characteristics before setting in the setter part of the incubator for the first 18 days. On day 19 all eggs were transferred to the hatcher room. Prior to shift eggs to the hatcher, all eggs were candled to check the fertility. Chicks were collected after 21 days from hatcher. The parameter such as, egg Weight, shell weight, shell thickness, albumen Weight, albumen height, yolk colour, yolk height, yolk diameter, yolk weight, yolk index, meat spot, blood spot, hatchability percentage, chick weight, infertility percentage, dead in germ percentage, dead in shell percentage were studied.
The result of present study showed that, the mean egg weight indicated significant differences among different broiler strains. The maximum mean egg weight was recorded in Hubbard strain (68.5 gm ± 4.7).The mean shell weight showed significant difference among different broiler strains. The mean shell thickness showed non-significant difference among different broiler strains. The mean yolk colour, yolk diameter, yolk weight showed significant difference (p<O.O5) among four different broiler strains. The mean yolk height and yolk index showed non-significant difference (P>0.05) among different strains. The mean albumen weight and albumin height indicated significant difference (P<0.05) among four different broiler strains. The meat spot percentage showed that the significantly increased (P<0.05) number of meat spots were observed in eggs obtained from Hubbard strain (1.33 ±4.6) compared to all of other strains. The blood spot percentage significantly (P<0.05) higher number were recorded in starbro strain (1.98 ± 0.56) as compared to all other strains. The hatchability percentage of Hubbard strain (71.63 ± 5.71) was significantly (P<0.05) higher compared to Arbor Acre strain (39.71± 4.91) and Hybro strain (33.57+ 6.22) and the hatchability percentage of Hubbard strain (71.63 ± 5.71) and Starbro strain (68.30± 7.21) were with in same ranges. The mean chick weight indicated significant difference (P<0.05) among different broiler strains. The significantly highest (P<0.05) chick weight was recorded in Hubbard strain (45.17±4.6) as compared to all other strains. The infertility percentage of Hybro strain (1.77±0.20) and Arbor Acre strain (3 9.33±5.42) were significantly (P<0.05) higher compared to infertility percentage of Hubbard strain (14.66±6.67) and Starbro strain (24.50 ±4.26).The dead in shell and dead in germ percentage showed significant difference (P<0.05) among four different broiler strains
Based on the finding of this study it may be concluded that the egg quality characteristics like egg weight, shell weight, yolk colour, yolk weight, yolk diameter, albumin weight, albumin height, meat and blood spot percentage have significant differences among different broiler strains. The shell thickness, yolk index, yolk height non-significant difference among four different broiler strains. The Hubbard strain had maximum egg weight, yolk weight, yolk height, albumen height, in comparison to all other three strains. The results with regard to Hatchability traits like chick weight, hatchability percentage, infertility percentage, dead in germ percentage, dead in shell percentage have significant difference among different broiler strains. The Hubbard strain had maximum hatchability percentage and chick weight in comparison to all other three strains. On the basis of this study it may concluded that Hubbard strain have better results as compared to Arbor Acre, Hybro, Starbro strains.
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Bioavailability Of Minerals In Different Vegetable Protein Sources Commonly Used In Broiler Ration
Material type: Book ; Format:
Publisher: 2010 Dissertation note: The study was designed to investigate the relative bioavailability of minerals in different vegetable protein sources commonly used in broiler ration. The study was conducted in the Poultry Experimental Shed, University of Veterinary and Animal Sciences, Lahore. For this purpose 200 day old broiler chicks were purchased and were randomly distributed into five equal treatment groups A, B, C, D & E containing soyabean based control diet, rapeseed meal, sunflower meal, canola meal and guar meal respectively. Each treatment had 4 replicates having 10 chicks each. Birds were placed on floor for first 10 days then were shifted to cages on day with in same treatment and replicate groups and were fed on experimental feed. Feed and water were provided ad libitum. Body weight and feed consumption were recorded weekly and FCR and weight gain was also calculated accordingly.
The experiment was terminated at day 21, all birds were weighed and feed consumption was recorded to calculate weight gain and FCR. Two birds per replicate were randomly selected and 5m1 blood was taken from wing vein prior to slaughtering. After slaughter, organ weights, left tibia bone were taken. Blood samples, left tibia bone ash, and excreta samples were collected for analysis of macro (Ca, P, K, Mg, and Na) and microminerals (Mn, Cu, and Fe) analysis.
Data when statistically analyzed showed that there was a significant differences (P<0.05) between body weights, Birds fed canola and guar meal showed the highest (P<0.05) body weight compared to control birds. Feed consumption & FCR values
showed a non significant difference (P<O.05). Organ weight revealed non significant difference in liver & heart weights (P<O.05), however significantly (P<O.05) highest weights were observed for birds fed diet containing guar meal.
Amount of available Ca in plasma was significantly higher (P<O.05) when guar meal was fed as compared to P arid Mg which showed non significant (P<O.05) differences between treatments and the amount of available minerals Ca, P, Mg, K, and Fe in bone ash were also non significant (P<O.05) among birds fed control, rapeseed, sunflower, canola, and guar meal. The amount of available macrominerals (Ca, P, and Mg) in feed showed a significant difference (P<O.05) when birds were fed sunflower meal, control and guar meal. However, Na, and K levels of feed were non significant (P<O.05). The amount of available macrominerals (Ca, K and Na) in excreta significantly showed (P<O.05) difference when sunflower and guar meal were fed while P and Mg showed non significant (P>O.05) difference among all treatment groups, whereas microminerals like Cu, Mn and Fe showed a significant difference (P<O.05) when birds were fed a soya based control diet.
The overall bioavailability of macro minerals (Ca, P, Mg, K and Na) and microminerals (Cu and Fe) showed significant (P<O.05) among treatments groups. However Mn showed non significant (P<O.05) difference with highest bioavailability of guar meal. The results showed that among protein source supplements, soybean, sunflower, canola and guar meal showed higher digestibility and minerals content as compared to rapeseed meal.
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