McManus W R, Bigham M L
Res Vet Sci. 1978 Mar;24(2):129-33.
The structure of the microbial population of rumen liquor froom sheep fed diets of roughage and of whole wheat grain with and without mineral buffer additives was studied. Addition of either 2 per cent of a mixture of 1/1/1/1 sodium bicarbonate, potassium bicarbonate, disodium hydrogen phosphate and calcium hydrogen phosphate or of 1 per cent of aluminium hydroxide to grain diets acted to increase microbial concentration, allow persistance of a rumen flora of predominatly Gramnegative staining characteristic, and to increase the proportion of rods. Animals consuming these diets had an improved production performance. In the absence of dietary buffers the microbial population shifted towards a Gram-positive population with no reduction in the proportion of coccal forms.
研究了饲喂含或不含矿物质缓冲添加剂的粗饲料和全麦谷物日粮的绵羊瘤胃液中微生物种群的结构。向谷物日粮中添加2%的碳酸氢钠、碳酸氢钾、磷酸氢二钠和磷酸二氢钙的1/1/1/1混合物或1%的氢氧化铝，可提高微生物浓度，使以革兰氏阴性染色为主要特征的瘤胃菌群得以持续存在，并增加杆菌的比例。食用这些日粮的动物生产性能得到改善。在没有日粮缓冲剂的情况下，微生物种群向革兰氏阳性种群转变，球菌形态的比例没有降低。
