Sandoval D M, Gernat A G
Escuela Agricola Panamericana, Departamento de Zootecnia, Tegucigalpa, Honduras.
Poult Sci. 1996 Mar;75(3):311-4. doi: 10.3382/ps.0750311.
Feed restriction was implemented in a factorial design (2x4) when pullets were at either 5 or 10% egg production. Periods of feed restriction were for 0, 3, 4, or 5 d. Two trials each using 672 Hy-line W-77 White Leghorn Hens 19 wk of age were identified and randomly assigned to 16, 2x3 m pens at a density of 7 birds per square meter. Data recorded were days at sexual maturity, egg production, mortality, feed consumption, feed conversion, egg weight, body weight gain, and body weight uniformity. Hens placed on feed restriction reached sexual maturity 3 to 5 d later (P < 0.05) than the unrestricted birds. No significant main effects or interactions were found for egg production, feed consumption, feed conversion, mortality, egg weight, body weight gain, or body weight uniformity for the initial 15 wk or the entire egg production period. These results suggest that early egg size was not increased with the practice of early feed restriction nor did short- or long-term laying performance improve.
当小母鸡产蛋率达到5%或10%时，采用析因设计（2×4）实施限饲。限饲期为0、3、4或5天。确定了两项试验，每项试验使用672只19周龄的海兰W-77白来航母鸡，并将其随机分配到16个2×3米的鸡舍中，饲养密度为每平方米7只鸡。记录的数据包括性成熟天数、产蛋量、死亡率、采食量、饲料转化率、蛋重、体重增加和体重均匀度。限饲的母鸡比不限饲的母鸡性成熟晚3至5天（P<0.05）。在最初的15周或整个产蛋期，产蛋量、采食量、饲料转化率、死亡率、蛋重、体重增加或体重均匀度方面未发现显著的主效应或交互作用。这些结果表明，早期限饲并不能增加早期蛋重，短期或长期产蛋性能也没有改善。
