Greenhouse Cucumber Seeing Leaf Management Act
I. Seedling stage
If the blade tip sags, the green color or the edge of the cotyledon turn white and curl upwards, which is caused by the sudden temperature drop in the greenhouse. In production, weather protection should be done well in advance according to weather changes: keep the temperature at 22-25°C during the day and 15-18°C at night; if the tips of leaves are yellow, it may be due to lack of water or fertilization in the soil. Too much water caused by physiological problems, the management should be properly watered, so that the soil field capacity to maintain 85-90%.
Second, flowering results
If the leaves are shriveled, the thickening of the leaves, the pale yellowish leaves, and the dullness are mostly caused by the low temperature in the greenhouse. When severe, the leaf margin turns white. In production, insulation should be strengthened so that the temperature is maintained at 25-29°C during the day and 18-22°C at night. The minimum temperature must not be lower than 13°C to ensure normal plant growth and development. At the same time, many cultivators are also required to raise the ground temperature and increase the heat capacity inside the greenhouse. If the leaves are curled upwards and the leaf edges are light yellow, the temperatures in the shed are too high and the air humidity is too high. This phenomenon is often seen in cucumbers. Early buds. In terms of management, ventilation should be strengthened to increase the amount of water to be controlled so that the temperature is kept below 35°C and the humidity is kept at about 75%; if the blades become larger and thinner, the internodes are longer, and most of them are high-temperature, high-humidity, and low-light conditions in the shed. cause. In production, in addition to ventilation and dehumidification, a light curtain can be suspended on the rear wall of the greenhouse to increase the light intensity in the shed, especially at the rear; if the leaves hang on the edge of a cucumber blade in the morning, this phenomenon is physiologically called. The "splashing water" is a normal phenomenon. However, due to the prevalence of diseases at this time, pesticides should be applied in a timely manner to prevent diseases. Can use 5% chlorothalonil aerosol to fumigation in greenhouses, can play a variety of effects such as dehumidification, disease prevention, and treatment, and it is worth promoting.
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