【摘要】 本试验旨在验证在刚断奶仔猪日粮中增加可发酵碳水化合物(FC)的含量会抵消蛋白质发酵的负作用。选择272头刚断奶仔猪分为2×2因子排列的4个日粮处理组,每个因子分别给予低含量的FC(7.5%)和高含量的FC(13.5%)及低含量的粗蛋白质(CP,15%)和高含量的粗蛋白质(CP,22%)。经过4周的试验期发现,日粮中CP的量和FC的量间的相互作用是:采食量(P=0.022),日增重(P=0.001),料重比(P=0.033)。在低CP的日粮中,高含量的FC可减少50g/d的日增重;而在高CP的日粮中,FC的含量不会影响小猪的生长性能。在4周试验期内,在低CP和低FC的日粮中小猪的日增重(350g/d)和采食量(519g/d)最高。高含量的FC导致小肠中乳酸杆菌数量的增加(P=0.047)和大肠菌群的总量的减少(P=0.06)。同时,高含量的FC使小肠中乳酸的含量增加(P=0.08)和氨水含量的减少(P=0.04),并使结肠中VFA的含量增加(P=0.009)。小肠中CP含量的减少会导致氨水浓度的减少(P=0.003)。由此可以推断,日粮中的FC会影响到内脏中的微生物群落和发酵产物,但并没有提高仔猪的生长性能,高蛋白水平可以提高仔猪生产性能。更多还原

【Abstract】 To study negative effects of increasing the dietary amount of protein and fermentable carbohydrates(FC) on growth performance and intestinal property in newly weaned piglets.272 newly weaned piglets were allotted to 4 dietary treatments in a 2×2 factorial arrangement with low and high FC (7.5 % and 13.5 %)and crude protein (CP,15 % and 22 %)content as respective factors.The results showed that in the 4 weeks experimental period,interactions between dietary CP and FC content were found for feed intake (P=0.022),daily gain (P=0.001),and gain∶feed (P=0.033).The high-FC content reduced daily gain by 50 g/d in the low-CP diet,whereas the FC content did not affect growth performance in the high-CP diet.Over the 4 weeks experimental period,daily gain (350 g/d)and feed intake (519 g/d)were the highest for piglets on the low-CP low-FC diet.The high-FC content resulted in an increase in number of lactobacilli (P=0.047)and a decrease of total coliforms(P=0.06)in the small intestine.It increased the lactic acid content (P=0.08)and reduced the ammonia content(P=0.04)in the small intestine and increased the VFA content in the colon (P=0.009).The reduction in CP content reduced ammonia concentration in the small intestine (P=0.003).It was concluded that dietary FC influenced microbial population and fermentation products in the gut.But it had no effect on growth performance.更多还原