Hafeez A, Mader A, Ruhnke I, Röhe I, Boroojeni F Goodarzi, Yousaf M S, Männer K, Zentek J
Institute of Animal Nutrition, Department of Veterinary Medicine, Freie Universität Berlin, Königin-Luise-Str. 49, 14195 Berlin, Germany
Institute of Animal Nutrition, Department of Veterinary Medicine, Freie Universität Berlin, Königin-Luise-Str. 49, 14195 Berlin, Germany.
Poult Sci. 2015 Feb;94(2):240-8. doi: 10.3382/ps/peu070. Epub 2015 Jan 27.
Feed production with different milling methods, thermal treatment, and particle size may influence mineral digestibility and retention in eggs. The present study investigated the impact of roller (R) and hammer (H) mills, mash (M) and expandate (E) with fine (F) and coarse (C) particle sizes, on apparent ileal absorption (AIA) and apparent total digestibility (ATD) and retention of calcium, phosphorus, magnesium, zinc, manganese, copper and iron in yolk, albumen, and shell. A total of 384 hens (Lohmann Brown), 19 weeks old, were assigned using a randomized design with a 2×2×2 factorial arrangement. Eight experimental diets were offered ad libitum during the whole experimental period and one week before for diet adaption. The AIA of magnesium, zinc, copper, and iron was higher in treatment R in comparison with treatment H (P<0.01, P≤0.03, P<0.01 and P<0.01, respectively). The AIA of magnesium was higher in treatment M than treatment E (P<0.01). The AIA of magnesium was higher in treatment C in comparison with treatment F (P≤0.05) due to particle size. The ATD of copper and iron was higher in treatment R than treatment H (P<0.01 and P≤0.03, respectively). The ATD was higher for phosphorus and lower for iron in treatment F than treatment C (P≤0.05 and P≤0.02. respectively). The copper concentration in yolk and albumen was higher in treatment C than treatment F (P<0.01 and P≤0.03, respectively). Besides a few overall interactions, the AIA and ATD of copper and manganese were lower in H+M group than R+M group (P≤0.05). The ATD of iron was higher in the M+C group compared to the M+F group (P<0.01), whereas the albumen zinc concentration was higher in the E+C group than E+F group (P < 0.01). In conclusion, the feed produced by hammer mill had negative effects on AIA and ATD for trace elements in particular, but mineral concentrations in egg contents were mostly comparable for all treatments. Therefore, milling methods, thermal treatment, and particle sizes used in the present study can be used for layer feed formulation without negatively affecting egg quality.
采用不同制粉方法、热处理和粒度的饲料生产可能会影响矿物质在鸡蛋中的消化率和留存率。本研究调查了辊式（R）和锤式（H）粉碎机、粉料（M）和膨化料（E）以及细粒度（F）和粗粒度（C）对回肠表观吸收率（AIA）、表观总消化率（ATD）以及钙、磷、镁、锌、锰、铜和铁在蛋黄、蛋清和蛋壳中的留存率的影响。总共384只19周龄的罗曼褐母鸡采用2×2×2析因设计随机分组。在整个实验期以及适应期的前一周随意提供8种实验日粮。与处理H相比，处理R中镁、锌、铜和铁的AIA更高（分别为P<0.01、P≤0.03、P<0.01和P<0.01）。处理M中镁的AIA高于处理E（P<0.01）。由于粒度原因，处理C中镁的AIA高于处理F（P≤0.05）。处理R中铜和铁的ATD高于处理H（分别为P<0.01和P≤0.03）。处理F中磷的ATD高于处理C，而铁的ATD低于处理C（分别为P≤0.05和P≤0.02）。处理C中蛋黄和蛋清中的铜浓度高于处理F（分别为P<0.01和P≤0.03）。除了一些总体交互作用外，H+M组中铜和锰的AIA和ATD低于R+M组（P≤0.05）。与M+F组相比，M+C组中铁的ATD更高（P<0.01），而E+C组中蛋清锌浓度高于E+F组（P<0.01）。总之，锤式粉碎机生产的饲料对微量元素的AIA和ATD尤其具有负面影响，但所有处理下鸡蛋内容物中的矿物质浓度大多相当。因此，本研究中使用的制粉方法、热处理和粒度可用于蛋鸡饲料配方，而不会对鸡蛋品质产生负面影响。
