Department of Animal Sciences, University of Illinois, Urbana 61801, IL, USA.
J Anim Sci. 2021 Aug 1;99(8). doi: 10.1093/jas/skab129.
The objective of this study was to test the hypothesis that growth performance and carcass characteristics of pigs fed diets containing cold-fermented, low oil distillers dried grains with solubles (DDGS) is not different from that of pigs fed diets containing conventional DDGS regardless of the physical form of the diets. A total of 160 barrows and gilts were used. There were 4 diets, 10 pens per diet, and 4 pigs per pen. Pigs were weaned at 21 d of age and fed a common phase 1 diet that did not contain DDGS during the initial 7 d post-weaning. Pigs were then allotted to the four diets that were arranged in a 2 × 2 factorial design with two sources of DDGS (cold-fermented and conventional DDGS) and two diet forms (meal and pellets). Pigs were fed phase 2 diets from day 7 to 21 and phase 3 diets from day 21 to 43 post-weaning. All diets were based on corn and soybean meal, but phase 2 diets also contained 15% DDGS and phase 3 diets contained 30% DDGS. From day 43, pigs were fed grower diets for 38 d, early finisher diets for 38 d, and late finisher diets for 18 d and these diets also contained 30% DDGS. Feed was provided on an ad libitum basis and daily feed allotments were recorded. Pigs were weighed at the beginning of each phase and at the conclusion of the experiment. On the last day of the experiment, the pig in each pen with a body weight that was closest to the pen average was slaughtered and carcass measurements were determined. Combined results for the two nursery phases indicated that feeding meal diets instead of pelleted diets increased (P < 0.001) average daily feed intake and decreased (P < 0.05) gain to feed ratio (G:F). However, no differences between the two sources of DDGS were observed for the overall growth performance of weanling pigs. For the entire growing-finishing period, the source of DDGS did not affect growth performance, but pigs fed meal diets had reduced (P < 0.001) G:F compared with pigs fed the pelleted diets. There were no differences between the two sources of DDGS for carcass characteristics. Back fat was greater (P < 0.05) for pigs fed pelleted diets than for pigs fed meal diets. In conclusion, no differences in growth performance or carcass characteristics between pigs fed cold-fermented DDGS and pigs fed conventional DDGS were observed. However, pigs fed pelleted diets had greater G:F and greater back fat than pigs fed meal diets.
无论日粮的物理形态如何，饲喂冷发酵、低油酒糟干物质（DDGS）的日粮的猪的生长性能和胴体特性与饲喂常规 DDGS 的日粮的猪没有差异。共使用了 160 头公猪和母猪。有 4 种日粮，每种日粮 10 个栏，每个栏 4 头猪。猪在 21 日龄断奶，在断奶后最初 7 天内饲喂不含 DDGS 的通用第 1 期日粮。然后，将猪分配到由 2 个因素组成的 2×2 完全析因设计的 4 种日粮中，2 个因素为 DDGS 的 2 个来源（冷发酵和常规 DDGS）和 2 种日粮形式（颗粒料和粉料）。猪从第 7 天到第 21 天饲喂第 2 期日粮，从第 21 天到第 43 天饲喂第 3 期日粮。所有日粮均以玉米和豆粕为基础，但第 2 期日粮还含有 15%的 DDGS，第 3 期日粮含有 30%的 DDGS。从第 43 天开始，猪饲喂育肥期日粮 38 天，前期育肥期日粮 38 天，后期育肥期日粮 18 天，这些日粮也含有 30%的 DDGS。猪自由采食，每天记录饲料分配量。猪在每个阶段开始时称重，在实验结束时称重。在实验的最后一天，每个栏中体重最接近栏平均体重的猪被屠宰，测定胴体测量值。两个保育阶段的综合结果表明，饲喂颗粒料日粮而非粉料日粮增加（P<0.001）平均日采食量，降低（P<0.05）增重/采食量（G/F）。然而，对于断奶仔猪的整体生长性能，两种 DDGS 来源之间没有差异。对于整个生长-育肥期，DDGS 的来源并不影响生长性能，但饲喂颗粒料日粮的猪的 G/F 降低（P<0.001），而饲喂粉料日粮的猪的 G/F 降低。两种 DDGS 来源对胴体特性没有差异。背膘厚（P<0.05）对于饲喂颗粒料日粮的猪大于饲喂粉料日粮的猪。综上所述，饲喂冷发酵 DDGS 的猪与饲喂常规 DDGS 的猪的生长性能或胴体特性没有差异。然而，饲喂颗粒料日粮的猪的 G/F 和背膘厚大于饲喂粉料日粮的猪。
