Zinn R A
Imperial Valley Agricultural Center, University of California, El Centro 92243.
J Anim Sci. 1993 Mar;71(3):796-801. doi: 10.2527/1993.713796x.
Four Holstein steers (233 kg) with ruminal cannulas and "T" cannulas in the proximal duodenum were used in a 4 x 4 Latin square experiment to evaluate characteristics of ruminal and total tract digestion of a generic (CM-40, 40% CP) and a high-protein (CM-46, 46% CP) variety of canola meal (CM) compared with a conventional, solvent-extracted soybean meal (SBM). Treatments consisted of an 80% concentrate diet that contained 20% tapioca (TP) or 20% of the respective test protein sources. Supplemental proteins replaced TP in the basal diet. Intake of dietary treatments was restricted to 5.0 kg/d (DM basis, 2.2% BW). Ruminal digestion of OM was similar (P > .10) for the CM-supplemented diets. Ruminal digestion of OM was higher (5.8%, P < .01) for SBM than for CM diets. Ruminal digestibility of ADF was similar (P > .10) across treatments. Ruminal degradation of feed N was similar (P > .10) for CM diets but tended to be greater (6.7%, P < .10) for SBM. Ruminal degradation of N in CM-40, CM-46, and SBM averaged 71, 73, and 80, respectively. Passage of individual amino acids to the small intestine was similar for CM and SBM diets. Total tract DM digestibility (DMD) was similar (P > .10) for the CM diets. Total tract DMD was higher (2.9%, P < .01) for SBM than for CM diets. Total tract digestibility of ADF also tended to be higher (14; P < .10) for SBM than for CM diets. The DE (megacalories/kilogram) of the CM and SBM diets were greater (P < .01) than for the TP diet.(ABSTRACT TRUNCATED AT 250 WORDS)
选用4头安装有瘤胃瘘管和十二指肠近端“T”形瘘管的荷斯坦阉牛（体重233千克），进行4×4拉丁方试验，以评估普通菜籽粕（CM - 40，粗蛋白含量40%）、高蛋白菜籽粕（CM - 46，粗蛋白含量46%）与传统溶剂萃取豆粕（SBM）的瘤胃消化和全消化道消化特性。试验处理包括一种80%精料日粮，其中含有20%木薯淀粉（TP）或20%相应的试验蛋白质来源。补充蛋白质替代了基础日粮中的TP。日粮处理的摄入量限制为5.0千克/天（干物质基础，占体重的2.2%）。补充CM的日粮中，有机物质的瘤胃消化情况相似（P＞0.10）。SBM的有机物质瘤胃消化率高于CM日粮（高5.8%，P＜0.01）。各处理间酸性洗涤纤维的瘤胃消化率相似（P＞0.10）。CM日粮的饲料氮瘤胃降解情况相似（P＞0.10），但SBM的饲料氮瘤胃降解率倾向于更高（高6.7%，P＜0.10）。CM - 40、CM - 46和SBM的氮瘤胃降解率平均分别为71、73和80。CM和SBM日粮中单个氨基酸进入小肠的情况相似。CM日粮的全消化道干物质消化率（DMD）相似（P＞0.10）。SBM的全消化道DMD高于CM日粮（高2.9%，P＜0.01）。SBM的酸性洗涤纤维全消化道消化率也倾向于高于CM日粮（高14；P＜0.10）。CM和SBM日粮的消化能（兆卡/千克）高于TP日粮（P＜0.01）。（摘要截取自250字）
