This experiment was conducted to study the effects of probiotics, xylanase and amylase on fatty liver performance, fat deposition, internal organs
and serum biochemical indices of Landes geese. Thirty-two healthy Landes geese ［female, (3.43±0.10) kg］ were selected and randomly divided into four groups with eight replicates in each group and one goose in each replicate. Landes geese in the control group were fed with the basal diet. Landes geese in xylanase group, probiotics group and amylase group were fed with the diets supplemented with 100 g xylanase, 4 000 g probiotics and 200 g amylase per ton in the basal diet, respectively. The force-feeding experiment lasted for 23 days. The results showed as follows: 1) compared with the control group, the fatty liver weight of Landes geese in xylanase group, probiotics group and amylase group was increased by 4.96% (P>0.05), 13.08% (P<0.05) and 2.88% (P>0.05), respectively; the ratio of feed to liver weight was reduced by 6.86% (P>0.05), 15.75% (P>0.05) and 6.24% (P>0.05), respectively. 2) The abdominal fat weight, intestinal fat weight and subcutaneous fat thickness of Landes geese in xylanase group, probiotics group and amylase group were higher than those in the control group, of which the abdominal fat weight and intestinal fat weight in probiotics group were significantly higher than those in the control group (P＜0.05). 3) The bursa of Fabricius index and spleen index of Landes geese in xylanase group, probiotics group and amylase group were higher than those in the control group, of which the spleen index was significantly higher than that in the control group (P＜0.05); but the proventriculus and gizzard index had the tendency to decrease compared with the control group (P>0.05); in addition, the pancreas index of Landes geese in probiotics group was significantly lower than that in the other groups (P＜0.05). 4) The serum glucose content of Landes geese in probiotics group was the highest, and the triglyceride and total cholesterol contents were the lowest; however, the serum glucose, triglyceride and total cholesterol contents in xylanase group and amylase group were higher than those in the control group (P>0.05); the serum total protein, albumin, urea nitrogen and uric acid contents and the activities of aspartate aminotransferas and alanine aminotransferase of Landes geese in probiotics group were significantly lower than those in the control group (P＜0.05). Therefore, adding xylanase, probiotics and amylase into the diets is effective on improving fatty liver performance, fat deposition, digestive and immune status of Landes geese by different degrees, in which probiotics has a significant effect.［Chinese Journal of Animal Nutrition, 2010，22（6）:1665-1671］