3Lukaszewicz E,Chrzanowska M,Jerysz A,et al.Attempts on freezing the Greylag gander semen[J].Animal Reproduction Science,2004,80:163-173.
4Donoghue A M.Prospective approaches to avoid flock fertility problem:Predictive assessment of sperm function traits in poultry[J].Poultry Science,1999,78:437-443.
5Lukaszewicz E,Kruszynski W.Evaluation of fresh and frozen -thawed semen of individual ganders by assessment of spermatozoa motility and morphology[J].Theriogenology,2003,59:1627-1640.
6Liu S J,Zheng J X,Yang N.Semen quality factor as an indicator of fertilizing ability for geese[J].Poultry Science,2008,87:155-159.