Wiedmeier R D, Arambel M J, Walters J L
Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan 84322.
J Dairy Sci. 1987 Oct;70(10):2063-8. doi: 10.3168/jds.S0022-0302(87)80254-0.
Four nonpregnant and nonlactating Holstein cows fitted with ruminal fistulas were assigned to each of four diets in a 4 X 4 Latin square design. Dietary treatments were 1) basal diet containing 50% concentrate; 2) basal diet plus 90 g/d yeast culture; 3) basal diet plus 2.63 g/d Aspergillus oryzae fermentation extract; 4) basal diet plus 90 g/d of A. oryzae fermentation extract and yeast culture. Cows were fed diets at a rate of 86 g DM/kg BW.75 for 14 d adaptation followed by an 8-d collection period. Digestibility of dry matter was increased by A. oryzae and A. oryzae and yeast culture combination treatments. Digestibility of CP was increased regardless of fungal culture addition. Hemicellulose digestibility, percent ruminal cellulolytic organisms, and acetate to propionate ratio were increased by the addition of fungal supplements.
选用4头装有瘤胃瘘管的非妊娠、非泌乳荷斯坦奶牛，按照4×4拉丁方设计，将其分为四组，分别饲喂四种日粮。日粮处理如下：1）基础日粮，含50%精料；2）基础日粮+90克/天酵母培养物；3）基础日粮+2.63克/天米曲霉发酵提取物；4）基础日粮+90克/天米曲霉发酵提取物和酵母培养物。以86克干物质/千克体重0.75的饲喂量给奶牛喂食日粮，预饲14天，随后进入8天的收集期。米曲霉处理组以及米曲霉与酵母培养物联合处理组的干物质消化率有所提高。无论是否添加真菌培养物，粗蛋白的消化率均有所提高。添加真菌添加剂可提高半纤维素消化率、瘤胃纤维素分解菌百分比以及乙酸与丙酸比例。
