Effects of diet particle size on digestive parameters in D+ and D- genetic chicken lines selected for divergent digestion efficiency
Effects of diet particle size on digestive parameters in D+ and D- genetic chicken lines selected for divergent digestion efficiency
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DOI：
10.3382/ps.2008-00408
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发表时间：
2009-06-01
期刊：
影响因子：
4.4
通讯作者：
Carre, B.
中科院分区：
文献类型：
--
作者：
Rougiere, N.;Gomez, J.;Carre, B.
本试验的目的是通过测试饲料颗粒大小对两个品系的生长性能、消化效率和消化器官重量的影响，比较遗传选择的消化效率不同的D+和D-鸡品系。使用2 × 3析因处理安排来测试D+和D-品系（第六代）和3种饮食，即颗粒化标准玉米饮食（S）、通过用7%粗谷物壳稀释S饮食而制成的颗粒化船体饮食（H）、以及与S饮食相同的粗玉米饮食（C），其以30%粗粉碎玉米与70%颗粒化剩余部分混合的形式分布。7 ~ 26日龄饲喂试验日粮。综合26日龄所有饲粮的结果，D+型鸡的肌胃比D-型鸡重9%（P < 0.0001），小肠比D-型鸡轻10%（P < 0.0001）。3周龄时测定的脂肪、蛋白质和淀粉的AME（n）和消化率，D+组平均分别比D-组高3.5%、5.6%、5.8%和0.5%（P < 0.0002）。显著（P
The aim of this experiment was to compare the D+ and D- chicken lines genetically selected for divergent digestion efficiency by testing the effects of diet particle size on growth performances, digestion efficiencies, and digestive organ weights in both lines. A 2 x 3 factorial arrangement of treatments was used to test the D+ and D- lines (sixth generation) and 3 diets, namely a pelleted standard corn diet ( S), a pelleted hull diet (H) made by diluting S diet with 7% coarse cereal hulls, and a coarse corn diet (C) identical to the S diet, distributed as 30% coarsely crushed corn mixed with the 70% pelleted remaining part. Experimental diets were fed from 7 to 26 d of age. Combining results from all diets obtained at 26 d of age, D+ birds showed 9% heavier (P < 0.0001) gizzard and 10% lighter (P < 0.0001) small intestine than D- birds. The AME(n) and digestibilities of lipids, protein, and starch measured at 3 wk of age were, on average, 3.5, 5.6, 5.8, and 0.5% higher (P < 0.0002) in D+ than in D- birds, respectively. Significant (P