Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Poult Sci. 2010 Mar;89(3):386-92. doi: 10.3382/ps.2009-00233.
An experiment was conducted using 504 Hy-Line W-36 Single Comb White Leghorn hens (69 wk of age) randomly assigned to 1 of 7 treatments. These treatments consisted of a 47% corn:47% soy hulls diet (C:SH) fed ad libitum; a 94% corn diet fed at a rate of 36.3, 45.4, or 54.5 g/hen per day (CORN 36, CORN 45, and CORN 54, respectively); and a 94% corn distillers dried grains with solubles (DDGS) diet fed at the same rates as the previous corn diets (DDGS 36, DDGS 45, and DDGS 54, respectively) during the molt period of 28 d. The intent was to feed the DDGS diets for 28 d; however, all hens on these diets had very low feed intakes and greater than anticipated BW loss. Thus, they were switched to a 16% CP corn-soybean meal layer diet on d 19 of the molt period. At d 28, hens on all treatments were fed the same corn-soybean meal layer diet for 39 wk (73 to 112 wk of age). All DDGS diets and the CORN 36 diet resulted in total cessation of egg production during the molt period and egg production of hens fed the CORN 45, CORN 54, and C:SH diets had decreased to 3 and 4%, respectively, by d 28. Body weight loss during the 28-d molt period ranged from 14% for the CORN 54 diet to approximately 23% for the 3 DDGS diets. Postmolt egg production (5 to 43 wk) was higher for hens fed the DDGS molt diets than those fed the corn diets. There were no consistent differences in egg mass, egg-specific gravity, feed efficiency, or layer feed consumption among molt treatments for the postmolt period. These results indicate that limit feeding corn diet and DDGS diet in non-feed-withdrawal molt programs will yield long-term postmolt performance that is comparable to that observed by ad libitum feeding a C:SH diet.
一项实验使用了 504 只 69 周龄的海兰 W-36 单冠白来航母鸡，随机分为 7 种处理之一。这些处理包括自由采食 47%玉米：47%大豆皮日粮（C：SH）；以 36.3、45.4 或 54.5g/只/天的速度分别饲喂 94%玉米日粮（CORN 36、CORN 45 和 CORN 54）；以及以与之前玉米日粮相同的速度饲喂 94%玉米干酒糟及其可溶物（DDGS）日粮（DDGS 36、DDGS 45 和 DDGS 54）。实验的目的是在 28 天的换羽期内饲喂 DDGS 日粮 28 天；然而，这些日粮组的所有母鸡采食量都非常低，体重损失也超过预期。因此，在换羽期的第 19 天，它们被转换为 16%CP 玉米-豆粕产蛋鸡日粮。在第 28 天，所有处理组的母鸡都饲喂相同的玉米-豆粕产蛋鸡日粮 39 周（73 至 112 周龄）。在换羽期，所有 DDGS 日粮和 CORN 36 日粮导致产蛋量完全停止，而饲喂 CORN 45、CORN 54 和 C：SH 日粮的母鸡产蛋量分别在第 28 天降至 3%和 4%。在 28 天的换羽期内，体重损失范围从 CORN 54 日粮的 14%到 3 种 DDGS 日粮的约 23%。换羽后（5 至 43 周），饲喂 DDGS 换羽日粮的母鸡产蛋量高于饲喂玉米日粮的母鸡。在换羽后阶段，日粮处理之间在蛋重、蛋比重、饲料效率或产蛋鸡饲料消耗方面没有一致的差异。这些结果表明，在非停食换羽计划中限制饲喂玉米日粮和 DDGS 日粮将产生与自由采食 C：SH 日粮相当的长期换羽后性能。
