The added exogenous hormone and poly amino acid to culture medium can improve the inductivity of embryoid, increasing averagely 59.64% than that of the contrast.

在培养基中加入外源激素和多种氨基酸可以提高胚状体的诱导效率，平均比对照增加59.64%；

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All the 4 strains of cellulolytic bacteria and mixed rumen microbes can grow in the chemically defined medium with ammonia-nitrogen or peptide or amino acid as the sole nitrogen source.

所选4株菌和混合瘤胃微生物既能在氨氮为唯一氮源的合成培养基中生长，又能在含有肽和氨基酸的合成培养基中生长。

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