Said N W, Sullivan T W, Bird H R, Sunde M L
Poult Sci. 1984 Dec;63(12):2399-403. doi: 10.3382/ps.0632399.
A low-sodium diet (.08% Na) was used to force molt 409 hens. Another 421 hens were force molted by conventional water and feed restrictions. Birds were 68 weeks of age at that time, and two strains were about equally represented in each treatment group. These strains were: A, DeKalb; and B, Hisex. The low-sodium diet and water were provided ad libitum to the first group for the entire period of molt (42 days). The second group received no water for 3 days, and no feed for 4 days, after which incremental amounts of whole oats were provided as the only feed until Day 18. After Day 18, incremental amounts of a regular laying mash and decremental amounts of whole oats were provided through Day 26, when laying mash only was given ad libitum. Both treatment groups were in the same building and received the same lighting program during the force-molt period. This program consisted of: Days 1 to 3, no light; Days 4 to 18, 8 hr/day; Days 19 to 25, 9 hr/day; Day 26, 10 hr; then, light was increased 30 min weekly until 14 hr daily was attained. The low-sodium group ceased laying after 28 to 31 days, lost 8.7% of their premolt body weight, reduced feed consumption by 35%, and decreased egg production from 62.3% (in the 28 days preceding the molt) to 19% in the 42 days of molt; their mortality rate was 3.4%.(ABSTRACT TRUNCATED AT 250 WORDS)
采用低钠饮食（0.08%钠）对409只母鸡进行强制换羽。另外421只母鸡通过常规的水和饲料限制进行强制换羽。当时鸡龄为68周，每个处理组中两个品系的鸡数量大致相等。这两个品系分别是：A，迪卡布；B，海赛克斯。在整个换羽期（42天），第一组可自由采食低钠日粮和饮水。第二组3天不供水，4天不供料，之后逐渐增加全燕麦的供应量作为唯一饲料，直至第18天。18天后，逐渐增加常规产蛋鸡饲料的供应量，同时减少全燕麦的供应量，直至第26天，此后只自由供应产蛋鸡饲料。两个处理组位于同一鸡舍，在强制换羽期接受相同的光照程序。该程序包括：第1至3天，无光照；第4至18天，每天光照8小时；第19至25天，每天光照9小时；第26天，光照10小时；然后，每周增加光照30分钟，直至每天光照14小时。低钠组在28至31天后停止产蛋，换羽前体重减轻8.7%，采食量减少35%，产蛋率从换羽前28天的62.3%降至换羽期42天的19%；死亡率为3.4%。（摘要截断于250字）
