The single curve method, dual wavelength method, and hybrid curve method (standard method, control) were applied to determine the amylose content in potato variety 'Kexin 22' to investigate the impacts of different determination methods on the results of amylose content determination in potato tuber. The results indicated that the value of single curve method was relatively higher, and a significant difference was found between the standard method and the single curve method. No significant difference was observed for the results between the dual wavelength method and standard method, meanwhile, lower value was obtained for the coefficient of variation, and a good recovery rate was achieved for the dual wavelength method. In consequence, besides the standard method, the dual wavelength method was adequate for determination of potato amylose. This research provided further support for the selection of adequate amylose determination method in potato tubers.%为研究不同测定方法对马铃薯块茎直链淀粉含量的影响，采用单一曲线法、双波长法和混合曲线法（对照）测定马铃薯品种‘克新22号’的直链淀粉含量。结果表明：单一曲线法测定结果偏高，与标准方法测定值比较差异显著；双波长法测定结果与标准方法测定值差异不显著，且变异系数小，回收率好。因此，除国家标准方法之外，双波长法也适合测定马铃薯块茎直链淀粉含量。这一研究结论将为选择合适的马铃薯块茎直链淀粉含量测定方法提供进一步支持。
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