Egg production and economic efficiency of Khaki Campbell ducks reared on locally available feedstuffs in the coastal land stretch of the Red River Delta

摘要

Anegg-typeduckbreednamelyKhakiCampbellwasimportedfromThailandin1990andtestedforeggproductionandeconomicefficiencyundertwomanagementconditions:herdingandconfinement.Thetestedgroupsconsistedof6248layingducks,ofwhich3105ducksforherdingand3143ducksforconfinement.Duckswerefullyfedonlocalfeedstuffs.KhakiCampbellducksshowednormalphysiologicalstatusandyieldedhigheggproductivityunderbothmanagementconditionstested.Thereweresignificantdifferencesbetweenducksundertwomanagementconditionsforageatfirstegg,eggproductivityandfeedconsumptioninfavouroftheherdingsystem.