1Sauvant D,Giger S.Straw digestibility calculation and digestive interactions[A].In:M.Chenost and P.Reiniger (Editors),Evaluation of Straws in Ruminant Feeding[M].Elsevier,Barking,UK,1989,47-61.
2Ewing P.V,Wells C.A.The associative digestibility of corn silage,cottonseed meal and starch in steer rations[J].Georgia Agr.Exp.Sta.Bull.1915,115:271.
3Annison E.F,Lewis D.Metabolism in the Rumen[M].Methuen and Co.,London.1959.
