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通过响应面设计评估家禽日粮中添加磨碎谷物与制粒前后整粒谷物的效果。

Evaluation of ground grain versus pre- and post-pellet whole grain additions to poultry diets via a response surface design.

作者信息

Moss Amy F, Chrystal Peter V, Truong Ha H, Selle Peter H, Liu Sonia Yun

机构信息

a Poultry Research Foundation within The University of Sydney , Camden , Australia.

b Baiada Poultry Pty Limited , Pendle Hill , NSW , Australia.

出版信息

Br Poult Sci. 2017 Dec;58(6):718-728. doi: 10.1080/00071668.2017.1370698. Epub 2017 Sep 12.

Abstract
  1. The objective of this study was to compare the effects of pre- and post-pellet whole grain wheat additions to diets on growth performance, gizzard and pancreas development, nutrient utilisation and starch and protein (N) digestibility coefficients in broiler chickens via an equilateral triangle response surface design. 2. The three apical treatments of the equilateral triangle comprised (1A) a standard diet containing 600 g/kg ground wheat, (2B) the same diet containing 600 g/kg pre-pellet whole wheat and (3C) the same diet containing 300 g/kg ground wheat and 300 g/kg post-pellet whole wheat. Seven blends of the three apical diets were located within the triangle to complete the design and a total of 360 male Ross 308 chicks were offered the ten experimental diets from 7 to 28 d post-hatch. Model prediction and response surface plots were generated with R 3.0.3 software. 3. The most efficient FCR of 1.466 was observed in birds offered an almost equal mixture of the pre- and post-pellet whole grain apical dietary treatments, which corresponded to 172 g/kg ground grain, 256 g/kg pre-pellet whole grain, 172 g/kg post-pellet whole grain in a diet containing 600 g/kg wheat. 4. The most efficient energy utilisation (ME:GE ratio of 0.766) was observed in birds offered a blend of the ground grain and pre-pellet whole grain apical dietary treatments which corresponded to a mixture of 384 g/kg pre-pellet whole grain and 216 g/kg ground grain. 5. Pre-pellet whole grain feeding generated the most pronounced responses in increased relative gizzard contents, reduced gizzard pH and increased relative pancreas weights. Consideration is given to the likely differences between pre- and post-pellet whole grain feeding.
摘要
  1. 本研究的目的是通过等边三角形响应面设计,比较日粮中添加制粒前和制粒后全粒小麦对肉鸡生长性能、肌胃和胰腺发育、养分利用率以及淀粉和蛋白质(氮)消化率系数的影响。2. 等边三角形的三个顶点处理包括:(1A)含600 g/kg磨碎小麦的标准日粮;(2B)含600 g/kg制粒前全粒小麦的相同日粮;(3C)含300 g/kg磨碎小麦和300 g/kg制粒后全粒小麦的相同日粮。在三角形内确定了三种顶点日粮的七种混合日粮以完成设计,总共360只雄性罗斯308雏鸡在出壳后7至28天饲喂这十种试验日粮。使用R 3.0.3软件生成模型预测和响应面图。3. 在饲喂制粒前和制粒后全粒顶点日粮几乎等量混合物的肉鸡中观察到最有效的饲料转化率为1.466,这相当于在含600 g/kg小麦的日粮中,有172 g/kg磨碎谷物、256 g/kg制粒前全粒谷物、172 g/kg制粒后全粒谷物。4. 在饲喂磨碎谷物和制粒前全粒顶点日粮混合物的肉鸡中观察到最有效的能量利用率(代谢能:总能比为0.766),这相当于384 g/kg制粒前全粒谷物和216 g/kg磨碎谷物的混合物。5. 制粒前全粒饲喂在增加肌胃相对含量、降低肌胃pH值和增加胰腺相对重量方面产生了最显著的反应。同时考虑了制粒前和制粒后全粒饲喂之间可能存在的差异。

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