不同处理玉米的有机物质瘤胃降解率及小肠消化率的研究

The Degradability in the Rumen and Digestibility in Small Intestine of Corn Treated with Different Methods

用３头带瘤胃瘘管的杂种肉牛测定玉米、无机保护剂处理玉米、有机保护剂处理玉米、１０％和３０％鲜血处理玉米有机物质（ＯＭ）和非蛋白质有机物质（ＮＰＯＭ）的瘤胃动态降解率，ＯＭ分别为５３．０３％，４３．９１％，５３．５７％，３５．７３％和３８．８５％，ＮＰＯＭ分别为５３．６７％，４８．０６％，５５．７２％，３９．２４％和４４．４８％。用酶解法（牛小肠液冻干粉（ＢＩＦ））测得玉米、无机保护剂处理玉米、有机保护剂处理玉米、１０％和３０％鲜血处理玉米１２小时瘤胃非降解ＯＭ的消化率分别为７４．３９％，７６．２６％，７５．５４％，７７．８８％和７７．４３％，ＮＰＯＭ分别为６３．９２％，６４．７８％，６４．４３％，６７．７８％和６５．００％。

Three crossbred Steers fitted with permanent ruminal cannulas were used to determine ruminal disappearance characteristics of corn treated with different methods by Nylon bag technique. Degradability of OM of corn,corn treated with inorganic new protector,organic new protector,10% fresh blood corn and 30% fresh blood corn was 53.03%,43.91%,53.57%,35.73% and 38.85%,respectively. Non protein OM (NPOM) was 53.67%,48.06%,55.72%,39.24% and 44.48% respectively. The digestibilities determined by bovine intestine fluid(BIF) of OM and NPOM of corn of rumen incubated 12 hour showed:The OM digestibilities of corn,corn treated with inorganic new protector,organic new protector,10% fresh blood corn and 30% fresh blood corn were 74.39%,76.26%,75.54%,77.88% and 77.43%,respectively,The NPOM digestibilities were 63.92%, 64.78% ,64.43%,67.78% and 65.00%.