Coon C N, Leske K L, Akavanichan O, Cheng T K
Department of Animal Science, University of Minnesota, St. Paul 55108.
Poult Sci. 1990 May;69(5):787-93. doi: 10.3382/ps.0690787.
Adult Leghorn roosters were precision-fed 44% protein soybean meal (SBM) or 80% ethanol-extracted soybean meal (ESBM) to determine nutritional differences due to the removal of oligosaccharides. Dry-matter digestibility and TMEn as well as apparent hemicellulose and cellulose digestion were determined. The transit time, rate of passage, and pH of the cecal contents were also established with roosters that had consumed a .3% chromic-oxide diet that contained SBM or ESBM. The protein content of the SBM and the ESBM was 46.1 and 64.4%, respectively. The true-dry matter digestibility of SBM was 54%. The TMEn of the SBM on a dry-matter basis was 2,794 kcal per kg; and the apparent hemicellulose and cellulose digestibility was 9% and 0%, respectively. The true dry-matter digestibility of the ESBM was 67%. On a dry-matter basis, the TMEn of the ESBM was 3,368 kcal per kg; and the apparent hemicellulose and cellulose digestibility was 62% and 35%, respectively. Oligosaccharide digestion occurred mainly anterior to the ileo-cecal junction. Hemicellulose and cellulose digestion occurred predominantly in the lower gastrointestinal tract. The transit time for the ESBM diet was 115 min, compared to 71 min for the SBM diet. Based on a 16-h collection of excreta, the rate of passage was approximately 50% slower for the ESBM diet than for the SBM diet. The pH of the cecal contents from roosters consuming the ESBM diet was 7.21 versus 6.51 for the SBM diet.
给成年来亨鸡精确投喂蛋白质含量为44%的豆粕（SBM）或80%的乙醇浸提豆粕（ESBM），以确定去除低聚糖后的营养差异。测定了干物质消化率、真代谢能以及表观半纤维素和纤维素消化率。还对食用含SBM或ESBM的0.3%氧化铬日粮的公鸡的盲肠内容物的通过时间、通过率和pH值进行了测定。SBM和ESBM的蛋白质含量分别为46.1%和64.4%。SBM的真干物质消化率为54%。以干物质计，SBM的真代谢能为每千克2794千卡；表观半纤维素和纤维素消化率分别为9%和0%。ESBM的真干物质消化率为67%。以干物质计，ESBM的真代谢能为每千克3368千卡；表观半纤维素和纤维素消化率分别为62%和35%。低聚糖消化主要发生在回盲交界处之前。半纤维素和纤维素消化主要发生在下消化道。ESBM日粮的通过时间为115分钟，而SBM日粮为71分钟。基于16小时的排泄物收集，ESBM日粮的通过率比SBM日粮慢约50%。食用ESBM日粮的公鸡盲肠内容物的pH值为7.21，而食用SBM日粮的公鸡为6.51。
