Koelkebeck K W, Parsons C M, Douglas M W, Leeper R W, Jin S, Wang X, Zhang Y, Fernandez S
Department of Animal Sciences, University of Illinois at Urbana-Champaign, 61801, USA.
Poult Sci. 2001 Mar;80(3):353-7. doi: 10.1093/ps/80.3.353.
We used a total of 504 commercial Single Comb White Leghorn hens (69 and 65 wk of age) in each of two experiments, and hens were induced to molt by feed withdrawal only. Feed withdrawal lasted for 12 and 11 d, and hens lost 26 and 25%, body weight in Experiments 1 and 2, respectively. All hens were then weighed, and seven replicate groups of 12 hens each were assigned to molt diet treatments. In Experiment 1, diets consisted of a corn basal diet (7.9% CP) or corn basal diet supplemented with 7.5 or 10% spent hen meal (SHM) each from two different sources. In Experiment 2, the corn basal diet or this diet supplemented with 5 or 10% SHM alone or 5% SHM plus Met, Lys, and Trp was evaluated. A molt diet of 16% CP corn-soybean meal was used as a positive control in both experiments. Molt diets were fed for 15 d in both experiments, at which time all hens were fed a 16% CP layer diet. Performance was measured for 8 wk following the beginning of feeding the layer diet. Feeding the low-protein corn molt diet supplemented with 5 to 10% SHM improved early postmolt egg production performance and body weight gain compared with hens fed the corn basal diet alone. The 7.5 and 10% SHM diets yielded early postmolt performance that was not significantly different (P > 0.05) from that of hens fed the high-protein (16% CP) diet. Supplementing the 5% SHM diet with amino acids generally did not significantly improve performance. The present study thus indicates that improved early postmolt performance may be achieved by supplementation of a low-protein corn molt diet with 5 to 10% SHM.
我们在两项实验中分别使用了总共504只商用单冠白来航母鸡（69周龄和65周龄），并且仅通过停喂饲料来诱导母鸡换羽。停喂饲料持续了12天和11天，实验1和实验2中的母鸡体重分别下降了26%和25%。然后对所有母鸡进行称重，并将每组12只母鸡的7个重复组分配到换羽期日粮处理组。在实验1中，日粮包括玉米基础日粮（粗蛋白含量7.9%）或添加了来自两个不同来源的7.5%或10%淘汰母鸡粉（SHM）的玉米基础日粮。在实验2中，评估了玉米基础日粮或添加了5%或10% SHM单独添加或5% SHM加蛋氨酸、赖氨酸和色氨酸的日粮。在两项实验中，均使用粗蛋白含量16%的玉米 - 豆粕换羽期日粮作为阳性对照。在两项实验中，换羽期日粮均饲喂15天，之后所有母鸡改喂粗蛋白含量16%的蛋鸡日粮。从开始饲喂蛋鸡日粮起，对生产性能进行了8周的测定。与仅饲喂玉米基础日粮的母鸡相比，饲喂添加了5%至10% SHM的低蛋白玉米换羽期日粮提高了换羽后早期的产蛋性能和体重增加。7.5%和10% SHM日粮产生的换羽后早期性能与饲喂高蛋白（16%粗蛋白）日粮的母鸡相比无显著差异（P>0.05）。向5% SHM日粮中添加氨基酸通常不会显著提高生产性能。因此，本研究表明，通过向低蛋白玉米换羽期日粮中添加5%至10% SHM可以实现换羽后早期性能的改善。
