Abstract

Two experiments were conducted to test the hypothesis that the digestibility of gross energy (GE) and nutrients, and concentrations of digestible energy (DE) and metabolizable energy (ME) in two sources of distillers dried grains with solubles (DDGS) are not different despite different concentrations of fat in the two sources. Cold-fermented DDGS (6.82% fat) and a conventional DDGS (9.54% fat) were used. In experiment 1, 12 growing barrows (initial body weight = 55.2 ± 3.6 kg) that had a T-cannula installed in the distal ileum were allotted to one of three diets and two periods. Two diets contained either cold-fermented or conventional DDGS as the sole source of crude protein (CP) and amino acids (AA). The third diet was an N-free diet that was used to determine the basal endogenous losses of AA from the pigs. Each experimental period lasted 7 d and ileal digesta were collected on days 6 and 7 of each period. Results demonstrated that values for the standardized ileal digestibility (SID) of CP and most AA were greater (P < 0.05) or tended to be greater (P < 0.10) in cold-fermented than in conventional DDGS. In experiment 2, 24 barrows (initial body weight = 17.3 ± 1.3 kg) were randomly allotted to three diets with 8 replicate pigs per diet. A corn-based basal diet and two diets containing corn and either cold-fermented DDGS or conventional DDGS were formulated. Pigs were housed individually in metabolism crates and feces and urine were collected separately for 5 d after 7 d of adaptation. The apparent total tract digestibility (ATTD) of neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid-hydrolyzed ether extract (AEE) was greater (P < 0.01) in conventional DDGS than in cold-fermented DDGS, but there was no difference in ATTD of GE between the two sources of DDGS. However, conventional DDGS contained more (P < 0.001) DE and ME than cold-fermented DDGS because of greater GE. In conclusion, the SID of AA was greater in cold-fermented DDGS than in the conventional DDGS that was evaluated in this experiment, but the ATTD of NDF, ADF, and AEE, and ME were greater in conventional DDGS than in cold-fermented DDGS.

中文翻译：

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与饲喂生长猪的传统 DDGS 相比，在冷发酵、低油干酒糟和可溶物 (DDGS) 中，氨基酸的消化率更高，但纤维、脂肪或能量的消化率不高。

摘要

进行了两个实验来检验两种来源的可溶物干酒糟 ( DDGS )的总能 ( GE ) 和营养物质的消化率，以及可消化能 ( DE ) 和代谢能 ( ME ) 的浓度没有差异的假设。两种来源的脂肪浓度不同。使用冷发酵 DDGS（6.82% 脂肪）和传统 DDGS（9.54% 脂肪）。在实验 1 中，将 T 型套管安装在回肠远端的 12 只生长中的手推车（初始体重 = 55.2 ± 3.6 kg）分配到三种饮食和两个时期中的一种。两种日粮含有冷发酵或常规 DDGS 作为粗蛋白 ( CP ) 和氨基酸的唯一来源(AA )。第三种日粮是无氮日粮，用于确定猪的基础内源性氨基酸损失。每个实验周期持续 7 天，在每个周期的第 6 天和第 7 天收集回肠食糜。结果表明，CP 和大多数 AA的标准化回肠消化率 ( SID )值更大 ( P < 0.05) 或趋于更大 ( P< 0.10) 在冷发酵中比在传统 DDGS 中。在实验 2 中，将 24 头手推车（初始体重 = 17.3 ± 1.3 kg）随机分配到三种日粮中，每种日粮 8 头重复猪。配制了一种基于玉米的基础日粮和两种含有玉米和冷发酵 DDGS 或常规 DDGS 的日粮。猪单独饲养在代谢箱中，在适应 7 天后分别收集粪便和尿液 5 天。中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和酸水解醚提取物（AEE）的表观总消化率（ATTD）较大（P< 0.01) 在传统 DDGS 中比在冷发酵 DDGS 中，但两种 DDGS 来源之间的 GE 的 ATTD 没有差异。然而，传统的 DDGS比冷发酵的DDGS 含有更多（P < 0.001）DE 和 ME，因为它具有更大的 GE。总之，冷发酵 DDGS 中 AA 的 SID 比本实验评估的常规 DDGS 大，但 NDF、ADF、AEE 和 ME 的 ATTD 在常规 DDGS 中比冷发酵 DDGS 大.