狮头鹅、四川白鹅和乌鬃鹅生产性能及消化道生理比较研究

选用狮头鹅、四川白鹅和乌鬃鹅进行饲养对比试验,分别在1、7、14、21、28、42、56、70日龄屠宰,采集样品并测定生产性能、肠道生长指标,以及消化道酶活性,探讨狮头鹅、四川白鹅和乌鬃鹅生产性能和消化生理的差异。结果表明,狮头鹅在1-21日龄和28-70日龄的平均日增重(ADG)和料重比(F:G)均极显著高于四川白鹅和乌鬃鹅(P0.01),四川白鹅两个阶段的F:G极显著低于乌鬃鹅(P0.01);三种鹅十二指肠的相对重量和相对长度在1-21日龄之间差异不显著,42日龄、70日龄四川白鹅的十二指肠相对重量显著高于其他鹅(P0.05);整个阶段三种鹅空肠的酶活显著高于十二指肠,并表现出狮头鹅和乌鬃鹅高于四川白鹅的总体趋势。研究表明,狮头鹅在全阶段的生产性能均显著优于另外两种鹅,三种鹅消化道发育规律大致相同,均表现为小鹅阶段发育较快,大鹅阶段发育趋于平稳。

Comparison on growth performance and intestinal digestive physiology among Lionhead goose, Sichuan white goose and Wuzong goose

This experiment was conducted to compare the growth performance and intestinal digestive physiology of 1-21 and 28-70 day-old Lionhead goose, Sichuan white goose and Wuzong goose. A total of 270 healthy one-day-old Lionhead geese, Sichuan white geese and Wuzong geese were selected, respectively. Each species was 6 replicates, and each replicate has 45 geese. In 1, 7, 14, 21, 28, 42, 56, 70 days, two birds in each replicate were selected for slaughter, respectively. Growth performance, the growth index of intestine and digestive enzyme activity were determined. The results showed that ADG and F:G of Lionhead geese in 1-21days and 28-70 days were extremely higher than that of Sichuan white geese and Wuzong geese(P<0.01). F:G of Sichuan white geese in 1-21 and 28-70 days was significantly lower than that of Wuzong geese(P<0.01); the relative duodenum weights and relative duodenum lengths of three geese in 1-14 days were not significant, the relative duodenum weight of Sichuan geese in 42 and 70 days was significantly higher than that of other two geese(P<0.05); jejunal enzyme activities of three kinds of geese in whole stage were significantly higher than those of duodenum, and Lionhead goose and Wuzong goose have higher values than Sichuan white goose. It is concluded that Lionhead goose has better growth performance than the other two geese. The intestinal ontogenetic patterns of these three kinds of geese were roughly the same, which have the higher growth rate from 1 to 21 days, and become steady from 28 to 70 days.