综合比较各项指标，在本试验条件下，11 - 15周龄银香麻鸡饲粮中适宜的营养水平分别为：赖氨酸0.86%，蛋氨酸0.34%，苏氨酸0.67%。

Comparing all quotas, under the condition of this experiment, the optimum lysine, methionine, threonine level for 11-15 weeks of Yingxiang chicken can be: 0.86%, 0.34%, 0.67%, respectively.

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