How can the greenhouse tomatoes sit still?

The reasons why tomatoes can't sit on the fruit are: the lack of control over the length of the plant, the lack of timely release of the wind, the high temperature of the shed, the large amount of fruit left or the partial application of fertilizer, resulting in insufficient nutrient supply, unreasonable ratio of anthers, etc. Improperly caused. Therefore, in the fruiting period of tomatoes, the following management must be done well.
1. Control the growth of tomatoes and prevent them from growing. If the temperature is too high, especially if the night temperature is too high, the nutrient consumption of the plant will increase, and the accumulation will decrease, resulting in poor flower bud differentiation and difficulty in sitting. The soil moisture is high, and the use of nitrogen fertilizer is too much, which is easy to cause long growth and affect the fruiting rate. After the occurrence of the length, 15% paclobutrazol 1500 times or 500 times foliar spray can be used to inhibit vegetative growth. Also control the indoor temperature of the shed, increase the temperature difference between day and night, and avoid plant length.
2. Avoid high temperature effects. When the temperature in the shed reaches 35 °C and lasts for more than 2 hours, it will cause the flower bud differentiation of the tomato to be blocked. At night, it is generally 12 °C-18 °C, especially the night temperature should not be too high, otherwise the stem will be long and easy to appear. Falling flowers.
3. Avoid insufficient nutrients due to excessive fruit retention and partial application of fertilizer. The plants retain too much fruit, and most of the nutrients are absorbed by the lower fruits, which affects the flowering and fruit setting of the upper ears of the tomatoes. At the same time, in the flowering result period, not paying attention to rational fertilization, it will also result in insufficient nutrient supply for flowers and fruits. The method should be adopted: generally adopt the method of first and then less, such as leaving the first ear, leaving 3, the second ear, leaving 3-4, the third ear, leaving 4, and the upward ear, leaving 4-5. . If the growth of the plant is very weak, the first ear of fruit should not be left, and it is timely to topdress the roots, keep the flowers, and attack the fruit.
4. The ratio of anthers should be reasonable. Pay attention to the temperature first when you spend the flower. At higher temperatures, the concentration of anthers should be appropriately reduced.