Spring greenhouse high temperature and humidity easily lead to the formation of cucumber seedlings high seedlings, flower buds poorly differentiated, the result is small and thin. In the case of high temperature, drought, poor supply of water and nutrients, malformed melons such as "long melons" and "with hooked melons" are easily produced. Preventive measures: First, do a good job in the ventilation management of the shed, and avoid prolonged periods of high temperatures above 35°C. Second, small water pouring, timely replenishment of water. Third, timely coverage of shade nets, in general, after covering the shade net can reduce the temperature of about 5 °C. However, it should be noted that the use of shade nets should be combined with prevention and use under high temperature and strong light, and it should be pulled up when the light in the afternoon is weakened or when the light is cloudy. Fourth, appropriate increase in phosphorus and potassium fertilizers. Foliar application of 0.3-0.4% potassium dihydrogen phosphate or 0.1% urea solution can effectively increase the plant's resistance to heat.
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