| Titles |
|
English :
|
Growth performance and some physiological parameters of suckling lambs fed ascorbic acid.
|
|
Arabic :
|
النمو و بعض المقاييس الفسيولوجية للحملان الرضيعة المغذاة على حامض الاسكوربيك.
|
|
| Abstract |
This study was carried out at Mallawi Agriculture Research Station on suckling Chios lambs and their crosses with Ossimi from 2nd to 9th of age to investigate the effect of dietary ascorbic acid on growth performance, physiological parameters and blood profile during summer and on another trial treated and control crosses lambs were to solar radiation and exercise experiments only during summer they reached 9th week of age.
Suckling lambs were divided into two treatment groups similar in
I body weight and sex of animals, a control group (receiving no ascorbic
supplement) and ascorbic acid treated group received supplemental 2 grams ascorbic acid per animal every other day.
Body weight, milk intake and physiological parameters included
rectal, skin and wool temperatures were measured weekly the 2nd to the 9th week of age. Blood samples were taken biweekly at rd, 5th , and 9th week of age and Just before and after heat stress experiments (sun exposure and exercise) for determination of Hb, PCV, % RBCs. Serum was separated for subsequent analysis of some parameters total protein, albumin, globulin, glucose, triglycerides, cholesterol, transaminases (GOT & GPT) and total bilirubin in addition to WBCs T3, T 4 and cortisol hormones only in heat stress experiments.
Results obtained could be summarized in the following:-
Growth performance
1. Season had no significant effect on body weight and daily gain whereas intake was significantly higher (P< 0.01) in winter than in summer
2. Within different breeds, Chios lambs revealed lower (P<0.01) body weight, and milk intake whereas no significant differences between 3/4 and lambs were observed.
3. Dietary ascorbic acid was found to increase body weight (P<0.06), milk (P<0.01) and daily gain (P<0.05). 3/4 Chios and Chios lambs dietary ascorbic acid in summer season whereas higher response in winter season.
Physiological parameters
1) Respiration rate and rectal, skin and wool temperatures revealed higher 10 summer season than in winter. Values obtained in period (14:00 h) were significantly higher (P< 0. 01) than that recorded at morning (7:00h).
2) Chios and 3/4 Chios lambs showed lower RR, RT and WT than 1/2 Chios lambs.
3) Respiration rate and rectal temperature were significantly lower (P<0.01) ascorbic acid treated lambs, whereas no significant effect of ascorbic acid on ST and WT were observed. The effect was more marked in Chios and 3/4 Chios lambs and in summer than in winter, particularly in the afternoon period
Blood constituents
1) During summer, blood Hb, PCV, % and RBC`s were lower (p< 0.01) than that during winter
Within different breeds, Chios lambs recorded significantly lower (p<0.05) Hb, PCV, % and RBC's values than other two crosses.
Treated lambs had significantly higher Hb, PCV, % and RBC's
crosses summer season.
2) Serum total protein had insignificant increase during summer season,
whereas the increase in serum albumin in summer was highly significant (p<0.01).Contrary, in summer, serum globulin had insignificant lower values than t recorded in winter.
Among different breeds, Chios lambs had lower total protein and albumin than 1/2 Chios (P< 0.05) and 3/4 Chios (P< 0.0 1) whereas the
changes in serum globulin were not significant.
Dietary ascorbic acid increased serum total protein and its fraction.
the increase was significant only in 3/4 Chios lambs during summer and winter seasons and in Chios lambs only during summer.
3) Serum glucose concentration was significantly lower (P<0.01) in summer than in winter. Contrary, serum triglycerides and cholesterol were higher (P<0.01) summer season.
No breed differences in serum glucose concentration was observed,
Whereas Chios lambs showed higher (P<0.05) serum cholesterol and lower (P<0.01) serum triglycerides than crosses. Within crosses, 3/4 Chios lambs lower triglycerides (P< 0.01) and cholesterol (P< 0.0 1) than 1/2 Chios lambs.
Dietary ascorbic acid had no effect on serum triglycerides whereas the showed higher (P<0.05) glucose concentration and lower (P<0.01) serum cholesterol concentration than control lambs. The response of all treated different breeds was highly significant (P<0.01) in summer and winter seasons except in Chios lambs In summer season.
4) Except for the significant Increase (P<0.01) in serum GPT and total
bilirubin during summer season, GOT, GPT and total bilirubin showed no
significant response to season, breed and ascorbic acid supplementation.
Sun exposure and exercise
1) Lambs exposed to solar radiation and exercise showed highly significant (P<0.01) increase in RR, RT, ST and WT. Same trend was observed under each breed and treatment although treated lambs showed lower RR and RT than control lambs either before or after sun exposure and exercise.
2) Lambs exposed to solar radiation and exercise showed lower of hemoglobin, PCV, %, RBC's, WBC's, glucose, T4 and concentration
In albumin, cholesterol and cortisol hormone concentration than that observed before exposure to heat stress, whereas no in serum total protein, globulin, triglycerides, GOT, GPT, total bilirubin and triiodothironine were observed.
3) During heat stress, the response of two crosses to sun exposure and were similar, but 3/4 Ch lambs exhibited higher changes in serum
and cortisol during sun exposure and exercise and in PCV, % and after exercise than that observed in 1/2 Chios lambs mascorbic acid reduces the changes in PCV, % and Hb, total protein
exposure and exercise, respectively. whereas the changes In serum
glucose were larger in ascorbic acid treated lambs than control ones.
5) Ascorbic acid treated lambs showed higher serum T4 and lower serum
hormones than control lambs.
|
| Publication year |
1991
|
| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى- الجيزة
|
| Availability number |
537
|
| Organization Name |
Animal Production Research Institute (APRI)
|
| Country |
Egypt
|
| Department |
Sheep and Goat Research Department
|
| Author(s) from ARC |
|
| Agris Categories |
Animal physiology - Nutrition
|
AGROVOC
TERMS |
Ascorbic acid.
Blood composition.
Lambs.
Performance testing.
Suckling.
Summer.
|
| Publication Type |
Master Thesis
|