Cold root soil temperature is too low, if the soil temperature is lower than 10 °C cold root may occur. It showed that the roots stopped growing, the color turned brown, and the leaves turned yellow and wilted. Solution: Increased ground temperature promotes new roots.
The temperature of the root is too low (below 10°C) and the humidity is too high. The roots turned yellow, followed by rotting, dark green leaves, leaves were not developed, and some leaves were brown or brown on the edges. Solution: The cultivator should reduce humidity and raise the ground temperature.
If the seedling temperature in the seedling bed suddenly drops, or if the air outlet is too large, cold wind blows into the seedbed, it can cause flash seedlings. The performance of the leaves began to wilt, in severe cases, the leaves were water-like, and then continue to develop the edge of the leaves become dry. Solution: In the event of wilting, it can be resolved by backing it up for 2 hours.
The temperature of the seedling seedling bed is too high, the light is too strong or the leaves come into contact with the transparent cover, causing the leaves to lose water rapidly. The leaf margin turned white, dry and sometimes appeared necrotic spots. Solution: When the temperature is too high, it should be released in time to reduce the temperature and avoid contact between the blade and the cover.
Flower topping If the soil is prolonged in drought, nutrients in the soil cannot be used, or if the seedling period is too long and it is controlled too much, it will strongly inhibit vegetative growth and cause flower topping. The performance is that the plants grow weakly, the leaves are thin, and the top internodes are shortened and many male and female flowers are produced. Solution: watering, topdressing fast-acting nitrogen fertilizer, remove part of the male and female flowers and even young melons to promote vegetative growth.
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