摘要
选用3头装有永久瘤胃瘘管的云南黄牛,饲喂5种含不同加工处理(粉碎、粉碎蒸汽、干碾压、湿碾压、蒸汽压片)玉米的日粮,在精粗比为50∶50的条件下,采用3×5不完全拉丁方设计,测定5种日粮中干物质、有机物质、蛋白质、淀粉、中性洗涤纤维、酸性洗涤纤维的消化率以研究不同处理对饲料消化率的影响。试验结果表明,在5组处理玉米日粮中,蒸汽压片玉米日粮组干物质(DM)、有机物质(OM)和粗蛋白(CP)全消化道消化率显著提高(P<0.05)。全消化道淀粉消化率各处理玉米日粮组间存在差异,蒸汽压片与粉碎蒸汽玉米日粮组显著高于干碾压与湿碾压玉米日粮组(P<0.05),而与粉碎玉米日粮组间没有显著差异(P>0.05)。中性洗涤纤维(NDF)与酸性洗涤纤维(ADF)的消化率在5组处理玉米日粮间没有显著差异(P>0.05)。
Three local bulls surgically fitted with luminal fistula were used in 3×5 incomplete Latin squares to study the effect of corn processing on the nutrient digestibility in the total tract. The results showed that compared with ground, steam-ground, dry-rolled and water-rolled corn diet, steam-flaked corn diet significantly increased the total tract digestibilities of DM, OM and CP digestibility （P〈0.05）. Compared with dry-rolled and water-rolled corn diet, steam-flaked and ground corn diet significantly increased the total tract digestibilities of starch （P〈0.05）. However, there is no significant difference between steam-flaked corn diet and ground corn diet （P〉0.05）. The digestibility of NDF and ADF showed no significant difference among five processed corns diets （P〉0.05）.
基金
云南省科技攻关计划重点项目资助(云计科技2002NG03)
