6Webel D M ,Fernandez S R,Parsons C M ,et al. Digestible threonine requirement of broiler chickens during the period three to six and sixto eight weeks posthatching[J], Poult Sci. 1996,75:1253-1257.
7Leelercq B. Specific effects of lysine on broiler production :comparison with threonine and valine[J], Pouh Sci, 1998,77:118-123.
8Cifici I, Ceylan N. Effect of dietary theronine and crude protein on growth performance carcase and meat composition of broiler chickens[J]. Br Pouh Sci,2004,45:280-289.
9Kidd M T,Barber S J ,Virden W S,et al, Threoninc responses of cobb male finishing broilers in differing environmental eonditions[J]. J Appl Poult Res , 2003,12: 115-123.
10Kidd M T. Nutritional considerations concerning theronine in broilers[J]. World's Poultry Scinece Journal,2004,56:139-151.
