Song G L, Li D F, Piao X S, Chi F, Yang W J
National Feed Technology Engineering Research Center, China Agricultural University, Beijing, China.
Arch Tierernahr. 2003 Aug;57(4):297-306. doi: 10.1080/00039420310001594432.
Two experiments were conducted to compare the nutritional value of normal and high-oil corn for pigs. The normal corn and the two varieties (high-oil corns A and B) of high-oil corn contained 4.41, 7.35 and 8.86% ether extract, on DM basis, respectively. In experiment 1, six non-littermate crossbred barrows (37.8 +/- 1.3 kg BW) were fitted with ileal T-cannulas and used in a double replicated Latin Square digestion trial. Three diets were formulated containing 96.6% of one of the three varieties of corn as the only protein source. Chromic oxide (0.4%) was added as a digestibility marker. Additional vitamins and minerals were added to meet requirements. The digestible energy concentrations for normal corn and high-oil corn A and B were 16.53, 16.99 and 17.07 MJ/kg while the metabolizable energy values were 15.82, 16.32 and 16.36 MJ/kg, on DM basis, respectively. The ileal amino acid digestibility of high-oil corn was generally higher than that of normal corn with significant differences being observed for the essential amino acids isoleucine and phenylalanine. In experiment 2, 96 pigs (8.01 +/- 0.14 kg BW) were used to evaluate four diets in a 2 x 2 factorial design conducted over a 35-day period. Corn variety (high-oil vs. normal corn) and nutrient density (high content of protein and ME vs. low content of protein and ME) were set as the two main effects. During the first 14 days, pigs fed high-oil corn diets consumed more feed and tended to get higher daily gain than pigs fed normal corn. Over the entire 35-day experiment, increasing dietary nutrient density increased daily gain and tended to increase feed conversion, while variety of corn had no significant effects on performance. Overall, the present results indicate that the energy concentration and ileal amino acid digestibility of high-oil corn varieties were equal or superior to those in normal corn and therefore they should be able to be effectively utilized in diets fed to swine.
进行了两项试验以比较普通玉米和高油玉米对猪的营养价值。普通玉米以及两个高油玉米品种（高油玉米A和高油玉米B）的干物质基础上的乙醚提取物含量分别为4.41%、7.35%和8.86%。在试验1中，六头非同窝杂交公猪（体重37.8±1.3千克）安装了回肠T型套管，并用于双重复拉丁方消化试验。配制了三种日粮，分别含有96.6%的三种玉米品种之一作为唯一蛋白质来源。添加了0.4%的氧化铬作为消化率标记物。额外添加了维生素和矿物质以满足需求。普通玉米以及高油玉米A和B的干物质基础上的可消化能量浓度分别为16.53、16.99和17.07兆焦/千克，而代谢能值分别为15.82、16.32和16.36兆焦/千克。高油玉米的回肠氨基酸消化率总体上高于普通玉米，对于必需氨基酸异亮氨酸和苯丙氨酸观察到显著差异。在试验2中，96头猪（体重8.01±0.14千克）用于在35天期间进行的2×2析因设计中评估四种日粮。玉米品种（高油玉米与普通玉米）和营养密度（高蛋白和代谢能含量与低蛋白和代谢能含量）被设定为两个主要因素。在最初的14天里，饲喂高油玉米日粮的猪比饲喂普通玉米的猪消耗更多的饲料，并且日增重有增加的趋势。在整个35天的试验中，提高日粮营养密度增加了日增重，并倾向于提高饲料转化率，但玉米品种对生产性能没有显著影响。总体而言，目前的结果表明，高油玉米品种的能量浓度和回肠氨基酸消化率等于或优于普通玉米，因此它们应该能够有效地用于猪的日粮中。
