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| Titel: |
Compensatory growth after under-nutrition in market turkeys: Effect of low protein feeding and realimentation on body composition |
| Auteur: |
Auckland, J. N. Morris, T. R. |
| Verschenen in: |
British poultry science |
| Paginering: | Jaargang 12 (1971) nr. 1 pagina's 137-150 |
| Jaar: |
1971-01 |
| Inhoud: |
Turkey poults were fed starter diets containing either 29 or 20 per cent crude protein. Live-weight at 6 weeks was depressed by about 30 per cent in poults fed the low protein diet. From 6 to 10 weeks of age four protein levels were fed but carcass studies were restricted to the groups which received adequate amounts of protein at this stage. Sixty poults from each treatment were slaughtered for carcass studies at 6 weeks of age, and also at 7 weeks when the undernourished poults had reached the body weight attained by fully fed groups at 6 weeks. Further samples were taken for carcass analysis at 20 weeks of age. Percentage body fat was increased and percentage protein in the fat-free dry matter was decreased by feeding a low protein starter diet from o to 6 weeks. Poults fed the low protein starter diet retained nitrogen more efficiently during the period of undernutrition and in the first stages of recuperation. Following a return to full feeding at six weeks, body protein content was quickly restored, but a longer period was required before their body fat percentage was reduced to the level of fully fed controls. The organs which were weighed were little affected, except in the case of the gizzard and liver which became proportionately heavier in retarded turkeys at 6 weeks of age. Only spleen weight appeared to have been reduced in relation to total body weight but it occupied a similar proportion in high and low groups when compared on a fat-free basis. Some, but not all, of the organs weighed were restored to normal proportions by 20 weeks of age. However, dressing percentage and economic value of carcasses at market weight were not materially affected by early nutritional treatment. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 17 gevonden artikelen
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