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  [1]. Twining, P.V., O.P. Thomas, and E.H. Bossard. The number of feathers on the litter; another criterion for evaluating the adequacy of broiler diets[J]. Poultry Science, 1976. 55(4): p. 1200-1207.
  [2]. Wheeler, K.B. and J.D. Latshaw. Sulfur amino acid requirements and interactions in broilers during two growth periods[J]. Poultry Science, 1981. 60(1): p. 228-236.
  [3]. Urdaneta-Rincon, M., and S. Leeson. Effect of dietary crude protein and lysine on feather growth in chicks to twenty-one days of age[J]. Poultry Science, 2004. 83(10): p. 1713-7.
  [4]. µ¥°²É½, Íõ°². ¼¦Ì岻ͬ²¿Î»ÓðëÖÐ9ÖÖ¿óÎïÔªËØº¬Á¿µÄ±È½Ï[J]. ¶«±±Å©Òµ´óѧѧ±¨, 1990.
  [5]. Ôø·æ. ²»Í¬Ð¿Ô´¶ÔÂéÓðÈ⼦Éú³¤ÐÔÄܼ°ÓðëÉú³¤Ó°Ïì[D].»ªÄÏũҵ´óѧ, 2009.

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