Department of Animal Science, University of Minnesota, St. Paul 55108, Minnesota, USA.
J Anim Sci. 2011 Oct;89(10):3140-52. doi: 10.2527/jas.2010-3342. Epub 2011 May 13.
Two studies were conducted to assess the energy content of low-solubles distillers dried grains (LS-DDG) and their effects on growth performance, carcass characteristics, and pork fat quality in grow-finish pigs. In Exp. 1, 24 barrows (Yorkshire-Landrace × Duroc; 80 to 90 d of age) in 2 successive periods were assigned to 1 of 6 dietary treatments. In individual metabolism stalls, pigs were fed a corn-soybean meal diet (control); control replaced by 30, 40, or 50% LS-DDG; or control replaced by 30 or 40% distillers dried grains with solubles (DDGS) at 3% of their initial BW for 12 d. All diets contained 0.25% CrO(2). During the 5-d collection period, feces and urine were collected from each pig. Feed, feces, and urine were analyzed for DM, GE, and N concentrations, and feed and feces were analyzed for Cr content. The ME content of LS-DDG (2,959 ± 100 kcal/kg of DM) was similar to that determined for DDGS (2,964 ± 81 kcal/kg of DM). In Exp. 2, 216 Yorkshire-Landrace × Duroc pigs were blocked by initial BW (18.8 ± 0.76 kg) and assigned to 1 of 24 pens (9 pigs/pen). Pens within block were allotted to 1 of 3 dietary treatments (8 pens/treatment) in a 4-phase feeding program: a corn-soybean meal control (control), control containing 20% LS-DDG, or control containing 20% DDGS. Treatment had no effect on final BW, ADG, ADFI, or HCW. Pigs fed LS-DDG had similar G:F (0.367) compared with pigs fed DDGS (0.370), but tended (P = 0.09) to have decreased G:F compared with pigs fed the control (0.380; pooled SEM = 0.004). Dressing percent was less (P < 0.01) for pigs fed LS-DDG (72.8%) and DDGS (72.8%) compared with the control (73.8%; pooled SEM = 0.22). Pigs fed LS-DDG (54.8%) had greater (P = 0.02) carcass lean compared with pigs fed DDGS (53.4%), but were similar to pigs fed control (54.1%; pooled SEM = 0.33). Bellies from pigs fed DDGS (12.9°) were softer (P < 0.01) than those from pigs fed control (17.7°; pooled SEM = 1.07) as determined by the belly flop angle test. Feeding LS-DDG (14.1°) tended (P < 0.10) to create softer bellies compared with control-fed pigs. The PUFA content of belly fat was reduced (P < 0.01) by LS-DDG (14.0%) compared with DDGS (15.4%), but was increased (P < 0.05) compared with pigs fed the control (9.4%; pooled SEM = 0.34). In conclusion, LS-DDG and DDGS had similar ME values and inclusion of 20% LS-DDG in diets for growing-finishing pigs supports ADG and ADFI similar to that of diets containing 20% DDGS, and may reduce negative effects on pork fat compared with DDGS.
进行了两项研究来评估低溶性酒糟（LS-DDG）的能量含量及其对生长性能、胴体特性和生长育肥猪的猪肉脂肪质量的影响。在试验 1 中，24 头公猪（约克夏-长白猪×杜洛克；80 至 90 日龄）分为 6 个日粮处理组中的 1 个。在单个代谢围栏中，猪只饲喂玉米-豆粕日粮（对照）；对照日粮用 30%、40%或 50%的 LS-DDG 替代；或对照日粮用 3%的含可溶物的酒糟（DDGS）替代，以其初始体重为基础。所有日粮均添加 0.25%的 CrO2。在 5 天的收集期内，从每头猪收集粪便和尿液。分析饲料、粪便和尿液的 DM、GE 和 N 浓度，并分析饲料和粪便的 Cr 含量。LS-DDG（2959±100kcal/kgDM）的 ME 含量与 DDGS（2964±81kcal/kgDM）的 ME 含量相似。在试验 2 中，216 头约克夏-长白猪根据初始体重（18.8±0.76kg）进行分组，并分配到 24 个栏位（每栏 9 头猪）。根据 3 种日粮处理（每处理 8 个栏位）进行分组：玉米-豆粕对照（对照）、含 20%LS-DDG 的日粮、或含 20%DDGS 的日粮。处理对最终体重、ADG、ADFI 或 HCW 没有影响。与饲喂 DDGS 的猪相比，饲喂 LS-DDG 的猪的 G:F（0.367）相似（P=0.09），但趋于降低（P=0.09），与饲喂对照日粮的猪相比（0.380；pooled SEM=0.004）。与饲喂对照日粮（73.8%）和 DDGS（72.8%）的猪相比，饲喂 LS-DDG（72.8%）的猪的屠宰率较低（P<0.01）；pooled SEM=0.22）。与饲喂 DDGS 的猪相比（53.4%），饲喂 LS-DDG（54.8%）的猪的胴体瘦肉较多（P=0.02），但与饲喂对照日粮的猪相似（54.1%；pooled SEM=0.33）。DDGS 组猪的腹部柔软度（12.9°）显著低于对照日粮组（17.7°；pooled SEM=1.07）（根据腹部跌落角度测试）。与对照日粮组相比，饲喂 LS-DDG（14.1°）的猪的腹部柔软度有降低的趋势（P<0.10）。与 DDGS 相比，LS-DDG 降低了腹部脂肪中的多不饱和脂肪酸（PUFA）含量（P<0.01）（14.0%），但与饲喂对照日粮的猪相比，PUFA 含量增加（P<0.05）（9.4%；pooled SEM=0.34）。总之，LS-DDG 和 DDGS 的 ME 值相似，在生长育肥猪日粮中添加 20%LS-DDG 可支持 ADG 和 ADFI 与添加 20%DDGS 的日粮相似，并可能与 DDGS 相比降低对猪肉脂肪的负面影响。
