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早春保护地黄瓜在定植初期,棚内温差较大,晴天温度可达40℃以上,而夜间又可能遭遇0℃～2℃的低温。这就要求培育出的苗子,既要具有一定的抗热性,又要具有一定的耐寒能力。“大温差育苗”就是为适应现代保护地生产而采取的一种特殊育苗方法。运用这种方法培育出的苗子,叶色浓绿,叶片厚实,茎粗,节间短,根系发达,定植后的秧苗能很快适应棚内气温多变的小气候,从而利于早熟和丰产。
Early spring cucumber protection in the early planting, greenhouse temperature larger, sunny temperatures up to 40 ℃ above, and night may experience 0 ℃ ~ 2 ℃ low temperature. This requires nurturing the seedlings, it is necessary to have a certain degree of heat resistance, but also have some cold ability. “Large temperature difference nursery” is to adapt to the production of modern protection and take a special nursery method. Using this method to cultivate the seedlings, dark green leaves, thick leaves, stem thick, short internodes, developed roots, planting seedlings can quickly adapt to the greenhouse temperature changeable microclimate, which is conducive to early maturity and high yield.