In Sacco法评定玉米的不同加工处理方式对泌乳奶牛瘤胃干物质和淀粉降解规律的影响  

In Sacco Dry Matter and Starch Degradabilities of Corns Processed with Different Methods

作　　者：齐智利[1] 嘎尔迪[2] 卢寿锋[3] 赵芙蓉 齐德生[1] 王艳青[1] 

机构地区：[1]华中农业大学动物科技学院,湖北武汉430070 [2]内蒙古农业大学动物科技学院,内蒙古呼和浩特010018 [3]廊坊市农林科学院,河北廊坊065000 [4]牧泉元兴饲料有限责任公司,内蒙古呼和浩特010070

出　　处：《中国粮油学报》2006年第2期101-106,共6页Journal of the Chinese Cereals and Oils Association

基　　金：国家自然科学基金(批号30060061)的一部分

摘　　要：以3头安装有永久性瘤胃瘘管的泌乳前期荷斯坦奶牛为试验动物,在精粗比为55∶45的日粮条件下,采用In sacco法测定了不同加工处理的玉米在奶牛瘤胃内干物质和淀粉的降解规律。试验结果表明,不同加工处理方法可以程度不同的影响干物质和淀粉在瘤胃中的降解,与未处理玉米相比,挤压膨化和制粒加工处理能明显的提高玉米中淀粉在瘤胃中的降解率(P<0.05),压扁处理对干物质降解率无明显影响(P>0.05),但使淀粉瘤胃降解率明显提高(P<0.05),烘烤与焙炒加工处理能明显的降低玉米中干物质和淀粉在瘤胃中的降解率(P<0.01)。淀粉瘤胃降解率由高到低顺序依次为膨化玉米>颗粒玉米>压扁玉米>未处理玉米>焙炒玉米>140℃/35m in烘烤玉米。淀粉在瘤胃中的降解的影响因素最主要是淀粉的快速可溶部分和降解速率。In order to investigate the in sacco dry matter（DM） and starch degradabilities of corns processed with different methods, 3 healthy Chinese Holstein lactating cows with permanent rumen fistula were selected as experimental animals fed with the diet of concentration/forage ratio 55 ： 45. The result shows that the corn DM and starch degradabilities in rumen are different significantly （ P 〈 0.05 ） for corn processed with different methods. Compared with the control （unprocessed corn）, expanding and pelleting significantly increase the starch degradability （P 〈 0.05 ）, while toasting and roasting apparently decrease the starch degradability（ P 〈 0.05 ）. Rolling does not affect the DM degradability significantly（ P 〉 0.05 ）, but increases the starch degradability significandy（ P 〈 0.05 ）. The sequence of corn starch degradabilities in rumen are： expanded corn 〉 pelleted corn 〉 roiled corn 〉 unprocessed corn 〉 roasted corn 〉 corn toasted at 140℃ for 35min. The key factor affecting＇the degradability of corn starch in rumen is the rapid soluble fractions （S） in corn starch and the degradation rate （Kd） .

关 键 词：In sacco法 玉米 加工处理 泌乳奶牛 瘤胃降解规律 

分 类 号：TS972.123[轻工技术与工程] S823.5[农业科学—畜牧学]