Plavnik I, Wax E, Sklan D, Hurwitz S
Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Poult Sci. 1997 Jul;76(7):1006-13. doi: 10.1093/ps/76.7.1006.
The responses of growth and feed efficiency to pelleted feed was investigated in 4- to 7-wk-old broiler chickens, and in 8- to 12- and 16- to 20-wk-old turkeys. In all cases, the growth and feed efficiency responses were linear within the ranges of dietary energy tested. When energy was added by carbohydrate supplementation, weight gain and feed efficiency responses were parallel for both mash and pellets, but due to the growth response to pellets, the elevation was higher for pellets than for mash. When energy was added by fat, the growth response to pellets also resulted in an increase in function elevation but the slope of the response was lower than in mash feeding, possibly due to a decline in pellet quality as dietary fat increased. Grinding of pellets completely abolished the growth and feed efficiency responses observed when the physical form was preserved. In chickens, comparisons of ground pellets to mash suggested some decline in nutritional quality due to the process of pelleting when either carbohydrates or fat were increased in the diets. In both chickens and turkeys, the feeding of pelleted diets resulted in an increase in abdominal fat.
研究了4至7周龄肉鸡以及8至12周龄和16至20周龄火鸡对颗粒饲料的生长和饲料效率反应。在所有情况下，在所测试的日粮能量范围内，生长和饲料效率反应呈线性关系。当通过补充碳水化合物来添加能量时，粉料和颗粒料的体重增加和饲料效率反应是平行的，但由于对颗粒料的生长反应，颗粒料的提升幅度高于粉料。当通过添加脂肪来添加能量时，对颗粒料的生长反应也导致功能提升增加，但反应斜率低于粉料饲喂，这可能是由于日粮脂肪增加导致颗粒料质量下降。当保留颗粒料的物理形态时，将颗粒料磨碎完全消除了观察到的生长和饲料效率反应。在鸡中，将磨碎的颗粒料与粉料进行比较表明，当日粮中碳水化合物或脂肪增加时，由于制粒过程，营养质量有所下降。在鸡和火鸡中，饲喂颗粒料日粮均导致腹部脂肪增加。
