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

摘要

Thisexperim entw asconducted to com pare the grow th perform ance and intestinaldigestive physiology of1-21 and 28-70 day-old Lionhead goose, Sichuan w hite goose and W uzong goose. A total of 270 healthy one-day-old Lionhead geese,Sichuan w hite geese and W uzong geese w ere selected,respectively.Each species w as 6 replicates,and each replicate has 45 geese.In 1,7,14,21,28,42,56,70 days,tw o birds in each replicate w ere selected for slaughter, respectively. G row th perform ance, the grow th index of intestine and digestive enzym e activity w ere determ ined. T he results show ed that A D G and F:G of L ionhead geese in 1-21days and 28-70 days w ere extrem ely higher than that of Sichuan w hite geese and W uzong geese (P<0.01).F:G of Sichuan w hite geese in 1-21 and 28-70 days w as significantly lowerthanthatofW uzonggeese (P<0.01);therelativeduodenum weightsandrelativeduodenum lengthsofthreegeese in1-14dayswerenotsignificant,therelativeduodenum weightofSichuangeesein42and70dayswassignificantly higher than that of other tw o geese (P<0.05);jejunal enzym e activities of three kinds of geese in w hole stage w ere significantly higher than those of duodenum ,and Lionhead goose and W uzong goose have higher values than Sichuan whitegoose.ItisconcludedthatLionheadgoosehasbettergrowthperformancethantheothertwogeese.Theintestinal ontogeneticpatternsofthesethreekindsofgeesewereroughlythesame,whichhavethehighergrowthratefrom 1to21 days,and becom e steady from 28 to 70 days.%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（P<0.01），四川白鹅两个阶段的F：G极显著低于乌鬃鹅（P<0.01）；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（P<0.05）；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。