|
|
Effect of yucca schidigera extract on performance of some developed local strain chicks. 2-Body weight, conformation and phenotypic correlations between them
|
|
Abstract: Three hundred and ninety six, day-old unsexed, Dokki-4 and Dandrawi chicks, hatched in December (2005), were used in this experiment. Chicks were wing-banded, weighed to the nearest gram and equally and randomly distributed into three pens. Each strain was subjected to three treatments. First group was fed diet free of Yucca schidigera extract (control); the secand and third groups were fed a diet supplemented with 60 and 120 ppm Yucca schidigera extract, respectively. The stocking density was 16 chicks per square meter. Results obtained indicated that, using 60 ppm Yucca schidigera extract caused significant increased in body weight at 8 weeks in males and females Dokki-4 chicks. However, using 120 ppm Yucca schidigera extract caused significant increased in body weight at the same age in males and females Dandrawi chicks. Also, males and females Dokki-4 and females Dandrawi were treated with 120 ppm Yucca schidigera extract caused significant increased in body weight than the controls during the growth period from hatch to 4 weeks of age.
Shank length of males were significantly longer than females at different ages, strains and treatments. Dokki-4 male and female chicks receiving 60 ppm Yucca schidigera extract had longer shanks at 8 weeks of age when compared to the control and 120 ppm groups. However, males Dandrawi receiving 120 Yucca schidigera had longer shank length than those receiving Yucca schidigera at a level of 60 ppm and controls at 8 and 12 weeks of age.
Dokki-4 males receiving 60 ppm Yucca schidigera extract had longer keel length and bigger breast circumference than another groups at 4, 8 and 12 weeks of age. While, Dandrawi males receiving] 20 ppm Yucca schidigera had longer keel length and bigger breast circumference than another groups at the same age.
High positive phenotypic correlations were found between body weight and: shank length, keel length and breast circumference for combined sexes regardless strains and different treatments by Yucca schidigera extract at different age.
Male Dandrawi receiving 60 ppm Yucca schidigera extract had increased fleshing than control during the growth periods 4 to 8 weeks of age. While, males Dokki-4 and males Dandrawi receiving 120 ppm Yucca schidigera extract had increased fleshing than controls during the growth periods from 8 to 12 weeks of age. There were significant differences among strains, sexes and treatments in live body weight.
Feed consumption of Dokki-4 chicks significantly (P<0.05) decreased when treated with 60 or 120 ppm Yucca schidigera extract than the controls at periods 8 to12 weeks, and fromhatch to 12 weeks of age. Also,amount of feed consumed significantly decreased for Dandrawi treated with 120 ppm Yucca schidigera extract than the controls during the period from 8 to12 weeks of age.
Feed conversion was better for Dokki-4 chicks treated with 60 ppm . Yucca schidigera extract than the controls at the periods (4-8) and (8.,12) weeks of age. However, Dandrawichicks treated with 120 ppm Yucca schidigera extract has better feed conversion than the controls at periods (hatch-4), (4-8) and (hatch-12)weeks of age.
Growth hperformance index was higher for Dokki-4 chicks than controls when treated with 60 PPm Yucca schidigera extract supplemented to diet during the growth periods A to 8 and 8 to l2 weeks of age. While, growth performance index was higher in Dandrawi chicks treated with 120 ppm Yucca schidigera extract than the controls at periods (hatch-4) and (8-12) weeks of age.
Significant differences mortaliy rate for Doki-4 and Dandrawi chick between chicks of treated groups when compared with controls during the all growth periods of age.
In general, these results reveal the possibility of improving shank and keel length and breast circumference (indicates of meat production efficiency) oflocal strains at 12 weeks of age, by using Yucca schidigera extract.
|
| Publication year |
2008
|
| Pages |
38-56
|
| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
|
| Availability number |
|
| Organization Name |
|
| serial title |
Egyptian Journal of Applied Science
|
| ISSN |
1110-1571
|
| Author(s) from ARC |
|
| Agris Categories |
Animal husbandryAnimal physiology - Nutrition
|
AGROVOC
TERMS |
Body weight.
Chicks.
Phenotypes.
Yucca.
|
| Proposed Agrovoc |
conformation;phenotypic correlations;phenotypic correlation;
|
| Publication Type |
Journal
|