Department of Animal Science, University of Manitoba, Winnipeg, Canada R3T 2N2.
J Anim Sci. 2012 Dec;90(12):4373-9. doi: 10.2527/jas.2011-4858. Epub 2012 Aug 7.
The NE content of diets containing wheat-corn distillers dried grains with solubles (wcDDGS; 1:1 ratio) fed to growing pigs was determined using the comparative slaughter (CS), indirect calorimetry (IC), and chemical composition (CH) methods. The experimental diets were a corn-soybean meal control diet (CTRL), CTRL + 15% wcDDGS, and CTRL + 30% wcDDGS. In Exp. 1, 56 barrows (18.5 kg BW) were used to determine the NE value of diets using the CS method. Pigs were initially placed in 8 groups (7/group), based on BW and 1 pig/group was killed at the start of the experiment to obtain baseline body composition. The remaining 48 pigs were housed in pairs and allotted to the 3 diets (n = 8). Pigs had free access to feed and water for a 28-d period, after which 1 pig/pen was slaughtered to determine final body composition. Based on the CS method, NE values of 2,430, 2,427, and 2,429 kcal/kg DM were obtained for diets containing 0%, 15%, and 30% wcDDGS, respectively. In Exp. 2, 18 barrows (20.4 kg BW) were used to determine the NE value of diets using the IC and CH methods. Pigs were individually housed in metabolism crates and fed the 3 diets (n = 6) at 550 kcal ME/kg BW/d for a 16-d period. Feces and urine were collected from d 11 to 16, followed by measurement of O(2) consumption, CO(2) production, and urinary N, over a 36-h period using an IC system. For the IC method, NE values of 2,586, 2,513, and 2,520 kcal/kg DM were obtained for diets containing 0%, 15%, and 30% wcDDGS, respectively, and corresponding values for the CH method were 2,447, 2,451, and 2,368 kcal/kg DM, respectively. The NE values that were obtained with the CS, IC, and CH methods were not different.
采用比较屠宰法（CS）、间接测热法（IC）和化学组成法（CH）测定了含小麦-玉米干酒糟及其可溶物（wcDDGS；1:1 比例）的日粮中生长猪的净能（NE）含量。实验日粮为玉米-豆粕基础日粮（CTRL）、CTRL+15%wcDDGS 和 CTRL+30%wcDDGS。在试验 1 中，用 CS 法测定了日粮的 NE 值，使用了 56 头阉公猪（18.5 kg BW）。最初，根据 BW 将 1 头猪/组分为 8 组（7/组），并在实验开始时杀死 1 头猪以获得基础体组成。其余 48 头猪成对饲养，并分配到 3 种日粮（n=8）。猪自由采食和饮水 28d，然后每栏 1 头猪屠宰以确定最终体组成。根据 CS 法，分别含 0%、15%和 30%wcDDGS 的日粮的 NE 值为 2430、2427 和 2429 kcal/kg DM。在试验 2 中，用 IC 和 CH 法测定了日粮的 NE 值，使用了 18 头阉公猪（20.4 kg BW）。猪单独饲养在代谢笼中，以 550 kcal ME/kg BW/d 的 3 种日粮（n=6）饲喂 16d。从第 11 天到第 16 天收集粪便和尿液，然后在 36 小时内使用 IC 系统测量 O2 消耗、CO2 产生和尿氮。对于 IC 法，分别含 0%、15%和 30%wcDDGS 的日粮的 NE 值为 2586、2513 和 2520 kcal/kg DM，CH 法的相应值为 2447、2451 和 2368 kcal/kg DM。CS、IC 和 CH 法获得的 NE 值没有差异。
