What should I pay attention to when planting watermelons in hot weather?

Pay attention to high-temperature seedling death and water and fertilizer management when planting watermelon in high-temperature weather.

Growing habits:

Watermelon likes warm and dry climate and is not cold-resistant. The optimum temperature for growth and development is 24-30 degrees, the optimum temperature for root growth and development is 30-32 degrees, and the lowest temperature for root hair generation is 14 degrees.

Watermelon needs a large temperature difference between day and night during its growth and development.

Watermelon is drought-tolerant and moisture-intolerant. Too many rainy days and too high humidity are easy to get sick.

Watermelon likes light, has a long growth period and needs a lot of nutrition.

With the growth of watermelon, the fertilizer requirement increases gradually, and reaches the maximum when the fruit grows vigorously.

Watermelon has strong adaptability, and sandy soil with loose soil, deep soil layer and good drainage is the best. Like weak acidity, PH5-7.

Training points:

The flowering and fruiting period of summer sowing watermelon is in high temperature and rainy season. Therefore, in the selection of plots, in addition to strict rotation, we should also pay attention to the selection of sandy loam with high terrain, good irrigation and drainage conditions, deep soil layer and fertile soil.

Because there is much rain in summer, it is easy to cause fertilizer loss and leaching. Therefore, the base fertilizer should be mainly long-acting organic fertilizer, and the dosage should be sufficient.

After the previous crop is harvested, it should be deeply plowed and raked. Cultivation with high ridge or small ridge is convenient for drainage and waterlogging prevention.

Watermelons planted in summer are prone to various diseases and insect pests due to high temperature and rainy growth period, which is characterized by being vulnerable to aphids.

Covering with silver-gray reflective plastic film is an effective way to repel aphids and reduce virus harm.

In addition, it can stabilize soil moisture (both drought and waterlogging), prevent soil hardening, reduce soil nutrient loss and improve plant illumination.

During the growth of summer-sown watermelons, the temperature is high, there is much rain, and the air humidity is high, which is prone to pests and diseases.

Therefore, watermelon cultivated in summer has strict requirements on varieties, and the cultivated varieties must have the characteristics of disease resistance, moisture resistance, high temperature resistance, strong growth potential and strong photosynthetic capacity.

Varieties with disease resistance, high yield and high quality, which are generally introduced from rainy areas in the south, perform well in summer sowing cultivation.

Soak the seeds 2 ~ 3 days before sowing, accelerate germination, and sow after most seeds are exposed.

After sowing, the emergence of seedlings should be checked every day, and cotyledons should be broken in time to prevent seedlings from dying at high temperature.

Be careful when breaking the membrane, and don't make the crack too big. You can poke a hole about 2 cm in diameter with your finger and put the seedlings. After the square seedling, the damaged part of the plastic film at the base of the seedling stem should be sealed tightly with soil.