从农业推广学的角度，分析了豫玉22号得以大面积推广的原因。
The reasons of broad application of maize hybrid Yuyu 22 were studied from agricultural popularization perspective.
耐旱性弱的掖单13干物质积累受水分胁迫影响最大，耐旱性强的掖单2号受影响最小，耐旱性中等的豫玉22受影响程度居中。
The order of the influence of water stress on dry matter accumulation was: Yedan 13> Yuyu 22> Yedan 2, while the drought-tolerance order is: Yedan 2> Yuyu 22> Yedan 13.
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