Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA.
Poult Sci. 2012 Mar;91(3):712-8. doi: 10.3382/ps.2011-01889.
The objective of this study was to determine the ileal digestible energy (IDE), ME, and ME(n) contents of corn distillers grains (DDG) and corn distillers grains with solubles (DDGS) for 6-wk-old broiler chickens using a multiple linear regression method. The DDG and DDGS were incorporated into a corn-soybean meal-based reference diet at 3 levels (0, 300, or 600 g/kg) by replacing the energy-yielding ingredients. These 5 diets were fed to 120 male Ross 308 broilers from d 35 to 42 posthatch with 3 birds per cage and 8 replicate cages per diet in a randomized complete block design. The birds were fed a standard broiler starter diet from d 1 to 22 posthatch and a standard broiler grower diet from d 22 to 35 posthatch. The inclusion of DDG and DDGS linearly (P < 0.001) decreased ileal digestibility of DM, energy, and IDE. Supplementation of DDG (linearly and quadratically; P < 0.05) or DDGS (linearly; P < 0.05) decreased metabolizability of DM, N, energy, N-corrected energy, and ME and ME(n). By regressing the DDG and DDGS-associated IDE intake in kilocalories against kilograms of DDG and DDGS intake, the IDE regression equation was Y = -19 + 2,428 × DDG + 2,922 × DDGS, r(2) = 0.97, which indicates IDE values of 2,428 kcal/kg of DM for DDG and 2,922 kcal/kg of DM for DDGS. Similarly, the ME regression equation was Y = -24 + 2,279 × DDG + 2,800 × DDGS, r(2) = 0.98, which implies ME values of 2,279 kcal/kg of DM for DDG and 2,800 kcal/kg of DM for DDGS. For ME(n), the regression equation was Y = -20 + 2,176 × DDG + 2,688 × DDGS, r(2) = 0.98, which suggests ME(n) values of 2,176 kcal/kg of DM for DDG and 2,688 kcal/kg of DM for DDGS. The IDE, ME, and ME(n) values of DDGS were higher (P < 0.01) than those of DDG. From these values, we calculated the advantages in IDE, ME, and ME(n) of DDGS over DDG used in this study to be 20, 23, and 24%, respectively.
本研究旨在采用多元线性回归法测定 6 周龄肉鸡可消化能（IDE）、代谢能（ME）和代谢能（ME（n））的玉米酒糟（DDG）和玉米酒糟可溶性（DDGS）的含量。DDG 和 DDGS 通过取代能量产生成分，以 3 个水平（0、300 或 600 g/kg）掺入玉米-豆粕基础参考饮食中。这些 5 种饮食在 35 至 42 日龄时以 3 只/笼和 8 个重复笼/饮食的方式，给 120 只雄性罗斯 308 肉鸡饲喂，随机完全区组设计。在 1 日龄至 22 日龄时，雏鸡饲喂标准肉鸡起始日粮，在 22 日龄至 35 日龄时，雏鸡饲喂标准肉鸡生长日粮。DDG 和 DDGS 的添加呈线性（P < 0.001）降低了回肠干物质、能量和 IDE 的消化率。DDG（线性和二次；P < 0.05）或 DDGS（线性；P < 0.05）的补充降低了 DM、N、能量、N 校正能量和 ME 和 ME（n）的代谢率。通过将 DDG 和 DDGS 相关的 IDE 摄入量与 DDG 和 DDGS 摄入量的公斤数进行回归，IDE 回归方程为 Y = -19 + 2,428 × DDG + 2,922 × DDGS，r(2) = 0.97，表明 DDG 的 IDE 值为 2,428 kcal/kg DM，DDGS 的 IDE 值为 2,922 kcal/kg DM。同样，ME 回归方程为 Y = -24 + 2,279 × DDG + 2,800 × DDGS，r(2) = 0.98，表明 DDG 的 ME 值为 2,279 kcal/kg DM，DDGS 的 ME 值为 2,800 kcal/kg DM。对于 ME（n），回归方程为 Y = -20 + 2,176 × DDG + 2,688 × DDGS，r(2) = 0.98，表明 DDG 的 ME（n）值为 2,176 kcal/kg DM，DDGS 的 ME（n）值为 2,688 kcal/kg DM。DDGS 的 IDE、ME 和 ME（n）值均高于 DDG（P < 0.01）。根据这些值，我们计算出本研究中 DDGS 相对于 DDG 的 IDE、ME 和 ME（n）优势分别为 20%、23%和 24%。
