Opapeju F O, Nyachoti C M, House J D, Weiler H, Sapirstein H D
Department of Animal Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2.
J Anim Sci. 2006 Oct;84(10):2779-86. doi: 10.2527/jas.2005-353.
An experiment was conducted to determine growth performance, carcass characteristics, and fat quality of growing-finishing pigs fed diets based on short-season corn hybrids. Twenty-four individually housed, Cotswold, growing pigs with an initial BW of 41.4 (SD = 1.4) kg were blocked by BW and sex and randomly allotted from within block to 1 of 3 diets to give 8 replicate pigs per diet. Experimental diets consisted of a control based on barley and 2 diets based on corn as the main energy sources. A 3-phase feeding program for 20 to 50 kg (phase I), 50 to 80 kg (phase II), and 80 to 110 kg (phase III) of BW was used. Diets for each phase contained approximately 3.5 Mcal/kg of DE, with total lysine of 0.95, 0.75, and 0.64% in phase I, II, and III diets, respectively. Average daily gain, ADFI, and G:F were monitored weekly during each phase. Pigs were slaughtered after reaching a minimum BW of 100 kg to determine carcass characteristics. There were no effects of diet on ADG, ADFI, and G:F (0.45 +/- 0.02, 0.34 +/- 0.02, and 0.31 +/- 0.02 for phase I, II, and III, respectively). Carcass length, dressing percent, LM area, loin depth, backfat thickness, belly firmness, and L*, b*, and a* fat color were not different across dietary treatments. Pigs fed one corn variety had no differences in fatty acid profile with barley-fed pigs, whereas those fed the other variety of corn had a greater (P < 0.05) concentration of PUFA in their backfat. The results indicate that growth performance, carcass characteristics, and fat quality of pigs fed diets based on short-season corn hybrids and those fed the barley-based diet were not different.
进行了一项实验，以确定饲喂基于短季玉米杂交种日粮的生长育肥猪的生长性能、胴体特性和脂肪品质。24头初始体重为41.4（标准差 = 1.4）千克的科茨沃尔德生长猪单独饲养，按体重和性别进行分组，并在组内随机分配到3种日粮中的一种，每种日粮有8头重复猪。实验日粮包括一种以大麦为基础的对照日粮和两种以玉米为主要能量来源的日粮。采用了一个三阶段饲喂方案，分别针对体重20至50千克（第一阶段）、50至80千克（第二阶段）和80至110千克（第三阶段）的猪。每个阶段的日粮含有约3.5兆卡/千克的消化能，第一、二、三阶段日粮的总赖氨酸含量分别为0.95%、0.75%和0.64%。在每个阶段每周监测平均日增重、平均日采食量和料重比。猪达到最小体重100千克后屠宰，以确定胴体特性。日粮对平均日增重、平均日采食量和料重比没有影响（第一、二、三阶段分别为0.45±0.02、0.34±0.02和0.31±0.02）。胴体长度、屠宰率、腰大肌面积、腰部深度、背膘厚度、腹部紧实度以及脂肪颜色的L*、b和a值在不同日粮处理间没有差异。饲喂一种玉米品种的猪与饲喂大麦的猪在脂肪酸组成上没有差异，而饲喂另一种玉米品种的猪背膘中多不饱和脂肪酸浓度更高（P < 0.05）。结果表明，饲喂基于短季玉米杂交种日粮的猪与饲喂基于大麦日粮的猪在生长性能、胴体特性和脂肪品质方面没有差异。
