Sullivan J S, Knabe D A, Bockholt A J, Gregg E J
Dept. of Anim. Sci. Texas A&M University, College Station 77843.
J Anim Sci. 1989 May;67(5):1285-92. doi: 10.2527/jas1989.6751285x.
Growth traits with starter and grower pigs and a digestion trial were conducted to compare the nutritional value of Quality Protein Maize (QPM), food corn and conventional feed corn. The QPM, food and feed corn contained .45, .31 and .29% lysine, respectively. The growth trials evaluated a QPM-soybean meal diet formulated on a lysine basis (.96% in starter and .7% in grower diets) and four diets arranged in a 2 (food corn vs feed corn) X 2 (low vs high soybean meal) factorial. Soybean meal was either added in the same amount as in the QPM diet or was added to provide the lysine content of the QPM diet. Performance was similar for pigs fed food corn and feed corn in both trials. The QPM diets resulted in greater performance than food and feed corn diets containing the same level of soybean meal supplementation; starter pigs were more (P less than .10) efficient and grower pigs had a higher (P less than .01) rate and efficiency of gain. However, performance of pigs fed the QPM diets was not equal to that of pigs fed isolysinic food and feed corn diets; growth rate was lower (P less than .05) in starter pigs and gain:feed was lower (P less than .05) in grower pigs. Diets in the digestion trial consisted of the corns plus 3.25% casein. Energy digestibility was similar for all diets. Ileal N and amino acid digestibilities were highest for QPM, intermediate for food corn and lowest for feed corn. In most instances, these differences were significant (P less than .05). Apparent biological value was highest (P less than .05) for QPM. These trials indicate that food corn and feed corn have similar nutritional value, and that starter and grower pigs can benefit from the higher protein quality of QPM.
对仔猪和生长猪进行了生长性能试验以及消化试验，以比较优质蛋白玉米（QPM）、食用玉米和传统饲料玉米的营养价值。QPM、食用玉米和饲料玉米的赖氨酸含量分别为0.45%、0.31%和0.29%。生长试验评估了一种基于赖氨酸配制的QPM-豆粕日粮（仔猪日粮中赖氨酸含量为0.96%，生长猪日粮中赖氨酸含量为0.7%）以及四种按2（食用玉米与饲料玉米）×2（低豆粕与高豆粕）析因设计的日粮。豆粕添加量要么与QPM日粮相同，要么添加至QPM日粮的赖氨酸含量水平。在两项试验中，饲喂食用玉米和饲料玉米的猪的性能相似。与添加相同水平豆粕的食用玉米和饲料玉米日粮相比，QPM日粮使猪的性能更佳；仔猪更高效（P<0.10），生长猪的生长速度和生长效率更高（P<0.01）。然而，饲喂QPM日粮的猪的性能并不等同于饲喂等赖氨酸含量的食用玉米和饲料玉米日粮的猪；仔猪的生长速度较低（P<0.05），生长猪的料重比更低（P<0.05）。消化试验中的日粮由玉米加3.25%的酪蛋白组成。所有日粮的能量消化率相似。QPM的回肠氮和氨基酸消化率最高，食用玉米次之，饲料玉米最低。在大多数情况下，这些差异具有显著性（P<0.05）。QPM的表观生物学价值最高（P<0.05）。这些试验表明，食用玉米和饲料玉米具有相似的营养价值，仔猪和生长猪能够从QPM更高的蛋白质质量中受益。
