Effects of dietary fat on feed efficiency, reproductive performance, and in vitro lipogenesis by the turkey hen

Two 16-week feeding trials were conducted with Large White turkey hens to determine the effect of graded energy levels (as fat-6, 18, 30, and 42% substituted isocalorically for corn meal) on energy efficiency, reproductive performance, lipogenic enzyme activity, and in vitro lipogenesis. A constant...

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Bibliographic Details
Published in:Poultry science 1981-08, Vol.60 (8), p.1931-1938
Main Authors: Rosebrough, R W, Steele, N C, Frobish, L T, Weinland, B
Format: Article
Language:English
Subjects:
Animal Feed
Animals
Body Weight - drug effects
Coenzyme A - metabolism
Dietary Fats - pharmacology
Energy Metabolism
Fatty Acid Synthases - metabolism
Female
Lipids - biosynthesis
Liver - metabolism
Reproduction - drug effects
Turkeys - metabolism
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Summary:Two 16-week feeding trials were conducted with Large White turkey hens to determine the effect of graded energy levels (as fat-6, 18, 30, and 42% substituted isocalorically for corn meal) on energy efficiency, reproductive performance, lipogenic enzyme activity, and in vitro lipogenesis. A constant calorie: gram-protein ratio (17:1) was maintained for all dietary treatments. Also, other components of the diets were adjusted to maintain constant energy-to-nutrient ratios. Additional fat increased (P less than .05) energy utilization but had no effect on reproductive performance. Additional fat calories decreased (P less than .05) malic enzyme, isocitrate dehydrogenase, and fatty acid synthetase activities; however, fatty acid synthetase activity was the most responsive of the three enzymes to 42% metabolizable energy as fat. Liver lipid content was also decreased (P less than .05) by additional fat calories. In vitro lipogenesis (fatty synthesis from 10 mM (1-14C) sodium acetate) was also decreased (P less than .01) by additional dietary fat.
ISSN:0032-5791
DOI:10.3382/ps.0601931