日粮脂肪对火鸡母鸡肉料比、繁殖性能及体外脂肪生成的影响。

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

作者信息

Rosebrough R W, Steele N C, Frobish L T, Weinland B

出版信息

Poult Sci. 1981 Aug;60(8):1931-8. doi: 10.3382/ps.0601931.

DOI:10.3382/ps.0601931

Abstract

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.

摘要

用大白火鸡母鸡进行了两项为期16周的饲养试验，以确定分级能量水平（以脂肪等热量替代6%、18%、30%和42%的玉米粉）对能量效率、繁殖性能、脂肪生成酶活性和体外脂肪生成的影响。所有日粮处理均保持恒定的卡路里与克蛋白质比率（17:1）。此外，调整日粮的其他成分以保持恒定的能量与营养比率。额外添加脂肪提高了（P<0.05）能量利用率，但对繁殖性能没有影响。额外的脂肪热量降低了（P<0.05）苹果酸酶、异柠檬酸脱氢酶和脂肪酸合成酶的活性；然而，脂肪酸合成酶活性是这三种酶中对42%可代谢能量脂肪最敏感的。额外的脂肪热量也降低了（P<0.05）肝脏脂质含量。额外的日粮脂肪也降低了（P<0.01）体外脂肪生成（由10 mM（1-14C）醋酸钠合成脂肪）。