Bean cake was the best nitrogen source, and their optimal mass concentration for Bacillus sp. X18 and X10-1-2 were 4 % and 1 %, respectively.

两株菌的最佳氮源均为豆饼，X18的最佳豆饼质量分数为4%，而X10 - 1 - 2的最佳豆饼质量分数为1%。

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Bean cake was the best nitrogen source, and their optimal mass concentration for Bacillus sp. X18 and X10-1-2 were 4 % and 1 %, respectively.

两株菌的最佳氮源均为豆饼，X18的最佳豆饼质量分数为4%，而X10 - 1 - 2的最佳豆饼质量分数为1%。

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