1黄瓜在冬季怎样促进根系生长?答:山东、河北、河南等地,冬季日光温室黄瓜1月出现花包头(瓜打顶)、化瓜、节间缩短、叶色发黄,甚至出现金镶边等现象,特别是在定植期稍早的秋冬茬黄瓜棚室中发生更为严重。虽症状表现在地上茎、叶、花部分,但主要是由于地下根系生长不良,主根发黄,吸收养分的毛细根明显减少,其原因是植株见光时间短,再加上阴、雨、雾、雪天气,以及连续阴雾天气,白天温度不高,导致地温低,特别是2012年11月上中旬晴天多,气温高,植株长势偏 1 cucumber in winter how to promote root growth? A: Shandong, Hebei, Henan and other places, the winter solar greenhouse cucumber flowers appear Baotou (melon top), melon, internodes shortening, leaf color yellow, or even gold inlay Edge and other phenomena, especially in early autumn and winter cucumber shed in the colonization occurred more serious. Although the symptoms showed aboveground stems, leaves and flowers, it was mainly due to the poor growth of the underground root system. The main roots were yellow and the capillary root of absorbing nutrients was obviously reduced. The reason was that the plants saw light for a short time, coupled with overcast, rain, fog, Snowy weather, and continuous foggy foggy weather during the day, the temperature is not high, resulting in low ground temperature, especially in the sunny days in mid-November 2012, with high temperatures and long plant growth