Intestinal protein digestibility of feed ingredients for Shaanbei white cashmere goat

In current study, seven Shaanbei white cashmere goats with the same age and similar weight were separately fitted with rumen fistula (3 goats) or with T-type duodenal fistula (4 goats). Both the mobile nylon bag method and the three step in vitro procedure were employed to evaluate the apparent small intestinal digestibility of 8 feedstuffs, respectively. The apparent small intestinal digestibility of 8 feedstuffs (cotton meal, rape seed dregs, corn gluten meal, yeast, mulbrrry leaves, reed, amorpha, caragana) measured by mobile nylon bag was 77.24%、60.08%、96.36%、18.49%、42.05%、49.62%、30.36%、52.21%, respectively. Furthermore, regression analysis showed that there was positive correlation between the mobile nylon bag method and the three step in-vitro procedure which produced the equation of y=0.802 3x-0.128 5 (R2=0.911 5). In conclusion, cornglutenmeal has the potential capability to provid higher rumen undegraded protein (RUP).