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连续阴雨天,棚内温度过低和光照不足,易造成黄瓜“化瓜”。通过喷施叶面肥,(1%红糖+0.2%磷酸二氢钾+0.3%尿素)和适时揭盖草苫及适当放风等措施,可减少“化瓜”。高温:白天温度高于32℃,夜间高于18℃时,黄瓜光合作用受阻,呼吸作用增强,因营养消耗过多易产生“化瓜”;高温还会影响雌花的形成,且易出现畸形果。遇到这种情况应加强放
Continuous rainy days, greenhouse temperature is too low and inadequate lighting, easy to cause cucumber “melon ”. Through the application of foliar fertilizer, (1% brown sugar + 0.2% potassium dihydrogen phosphate + 0.3% urea) and the timely release of Caulis Caesarean and appropriate measures such as wind, can reduce the “melon”. High temperature: the daytime temperature is higher than 32 ℃, the nighttime is higher than 18 ℃, the cucumber photosynthesis is blocked, the respiratory effect is strengthened, because of the nutrition excessively easy to produce “melon ”; The high temperature will also affect the female flower formation, and is apt to appear Deformity fruit. Encounter this situation should be strengthened