Safaa H M, Jiménez-Moreno E, Valencia D G, Frikha M, Serrano M P, Mateos G G
Departamento de Producción Animal, Universidad Politécnica de Madrid, 28040, Spain.
Poult Sci. 2009 Mar;88(3):608-14. doi: 10.3382/ps.2008-00328.
A total of 960 Lohmann Brown laying hens were used to study the effects of the main cereal of the diet and geometric mean diameter (GMD) of the cereal on productive performance and egg quality from 20 to 48 wk of age. The experiment was a completely randomized design with 6 treatments arranged factorially with 2 cereals (dent corn vs. durum wheat) and 3 GMD of the cereal (hammer-milled to pass through 6-, 8-, or 10-mm screens). Each treatment was replicated 8 times (20 hens per replicate). All diets were formulated to be isonutritive and contained 50% of either corn or wheat. Productive traits were recorded every 4 wk and egg quality was measured at 48 wk of age. The only significant effect detected was for feed intake (P < 0.05) that was greater for hens fed coarse-ground cereals (10-mm screen) than for hens fed medium and fine-ground cereals (8- or 6-mm screen). None of the egg quality parameters studied were influenced by dietary treatment. We conclude that neither type of cereal nor GMD affected productive performance or egg quality of young brown hens, except for feed intake that increased with the coarser particle size.
总共960只罗曼褐蛋鸡用于研究日粮中主要谷物种类以及谷物几何平均直径（GMD）对20至48周龄蛋鸡生产性能和蛋品质的影响。试验采用完全随机设计，有6种处理，按析因设计安排，包括2种谷物（马齿玉米与硬质小麦）和3种谷物GMD（锤磨过6毫米、8毫米或10毫米筛网）。每个处理重复8次（每个重复20只母鸡）。所有日粮配方均为等营养，且含有50%的玉米或小麦。每4周记录一次生产性状，并在48周龄时测定蛋品质。检测到的唯一显著影响是采食量（P < 0.05），饲喂粗磨谷物（10毫米筛网）的母鸡采食量高于饲喂中磨和细磨谷物（8毫米或6毫米筛网）的母鸡。所研究的蛋品质参数均未受日粮处理的影响。我们得出结论，除了采食量随谷物粒度变粗而增加外，谷物种类和GMD均未影响年轻褐壳蛋鸡的生产性能或蛋品质。
