文章摘要
  
DOI：10.3969/j.issn.1004-874X.2011.11.050
Author NameAffiliation
官丽辉, 曹春梅, 张敏 河北北方学院动物科技学院,河北,张家口,075000
延边大学农学院,吉林,龙井,133400 
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