5O’Grady J F,Lynch P B,Kearney P A.Voluntaryfeed intake by lactating sows[].Livestock ProductionScience.1985
6Koketsu Y,Dial G D,Marsh W E,King V L.Charac-terization of feed intake patterns during lactation incommercial swine herds[].The Journal of Animal Ecology.1996
7Hermesch,S.Genetic analysis of feed intake in lactating sows[].ProcAssocAdvmtAnimBreedGenet.2007
8Eastham PR,Smith WC,Whittemore C T.Responses of lactating sows to food level[].Animal Production.1988