试验在不同水平(16.0%、18.5%、21.0%)酸性洗涤纤维(ADF)的饲粮中添加不同剂量(0、1.0%、1.5%)的酵母培养物(YC),探究饲粮ADF含量、YC添加剂量和两者间互作效应对山羊瘤胃体外发酵效果的影响。结果显示,随着饲粮中ADF水平的降低,30 h发...试验在不同水平(16.0%、18.5%、21.0%)酸性洗涤纤维(ADF)的饲粮中添加不同剂量(0、1.0%、1.5%)的酵母培养物(YC),探究饲粮ADF含量、YC添加剂量和两者间互作效应对山羊瘤胃体外发酵效果的影响。结果显示,随着饲粮中ADF水平的降低,30 h发酵液中乙酸、丙酸、总挥发性脂肪酸(TVFA)均显著提高(P<0.05)。添加YC能够增加30 h 18.5%与21.0%ADF组发酵液中乙酸、丙酸与TVFA含量,但均显著低于16.0%ADF饲粮组(P<0.05)。饲粮中ADF含量与YC添加剂量的互作效应对于发酵液pH值、乙酸、NH3-N与产气量有显著影响(P<0.05)。研究表明,YC剂量对于16.0%ADF饲粮影响无明显影响,添加1.0%相比于1.5%剂量YC能够促进18.5%与21.0%ADF饲粮组体外瘤胃发酵。展开更多
A common problem in rabbit production is the occurrence of digestive disorders just after weaning, and fiber is well known to be bcncficiai for rabbit gastrointestinal health. In order to test the hypothesis that w...A common problem in rabbit production is the occurrence of digestive disorders just after weaning, and fiber is well known to be bcncficiai for rabbit gastrointestinal health. In order to test the hypothesis that whether the good points of fiber increases with its dietary content, three isoenergetic and isonitrogenous diets and ninety mixed-sex New Zealand rabbits weaned 35-d-old were used. The results can be concluded as following： （1） Average daily feed intake （ADFI） tended to increase （i〉=0.058） while average daily gain （ADG） （p=0.001） and feed conversion ratio （FCR） （p〈0.001） deteriorated with increasing dietary ADF content. The highest morbidity was observed in the rabbits fed the highest dietary ADF concentration. （2）A decreasing coefficient of total tract apparent digestibility （CTTAD） of dry matter （DM） and crude protein （CP） was obtained with the increase of dietary fiber level （p〈0.001 and =0.003）. （3） A significant negative effect of treatments on sucrase and maltase activities in the jejunum was observed （p=0.001 and 0.003）. （4） The volatile fatty acid （VFA） concentration （p=0.011） and butyric acid （% total VFA） （P=0.001） dropped while the NH3-N concentration （P〈0.001）, pH （P=0.004） and acetic acid （% total VFA） （P〈0.001） increased with increasing dietary ADF. It was concluded that high fiber level was unfavorable to the rabbits in the first two weeks after weaning.展开更多
文摘试验在不同水平(16.0%、18.5%、21.0%)酸性洗涤纤维(ADF)的饲粮中添加不同剂量(0、1.0%、1.5%)的酵母培养物(YC),探究饲粮ADF含量、YC添加剂量和两者间互作效应对山羊瘤胃体外发酵效果的影响。结果显示,随着饲粮中ADF水平的降低,30 h发酵液中乙酸、丙酸、总挥发性脂肪酸(TVFA)均显著提高(P<0.05)。添加YC能够增加30 h 18.5%与21.0%ADF组发酵液中乙酸、丙酸与TVFA含量,但均显著低于16.0%ADF饲粮组(P<0.05)。饲粮中ADF含量与YC添加剂量的互作效应对于发酵液pH值、乙酸、NH3-N与产气量有显著影响(P<0.05)。研究表明,YC剂量对于16.0%ADF饲粮影响无明显影响,添加1.0%相比于1.5%剂量YC能够促进18.5%与21.0%ADF饲粮组体外瘤胃发酵。
文摘A common problem in rabbit production is the occurrence of digestive disorders just after weaning, and fiber is well known to be bcncficiai for rabbit gastrointestinal health. In order to test the hypothesis that whether the good points of fiber increases with its dietary content, three isoenergetic and isonitrogenous diets and ninety mixed-sex New Zealand rabbits weaned 35-d-old were used. The results can be concluded as following： （1） Average daily feed intake （ADFI） tended to increase （i〉=0.058） while average daily gain （ADG） （p=0.001） and feed conversion ratio （FCR） （p〈0.001） deteriorated with increasing dietary ADF content. The highest morbidity was observed in the rabbits fed the highest dietary ADF concentration. （2）A decreasing coefficient of total tract apparent digestibility （CTTAD） of dry matter （DM） and crude protein （CP） was obtained with the increase of dietary fiber level （p〈0.001 and =0.003）. （3） A significant negative effect of treatments on sucrase and maltase activities in the jejunum was observed （p=0.001 and 0.003）. （4） The volatile fatty acid （VFA） concentration （p=0.011） and butyric acid （% total VFA） （P=0.001） dropped while the NH3-N concentration （P〈0.001）, pH （P=0.004） and acetic acid （% total VFA） （P〈0.001） increased with increasing dietary ADF. It was concluded that high fiber level was unfavorable to the rabbits in the first two weeks after weaning.
