1. Reasonable ventilation
When the wind is released in the morning, due to the condensation on the surface of the fruit, the sudden release of the wind will inevitably cause the fruit to crack. After pulling the shed in the morning, open the air outlet to 6~8 cm and let it out for 10~15 minutes. The purpose is to put in carbon dioxide, strengthen the photosynthesis of crops, and discharge moisture and harmful gases. Afterwards, close the air outlet for heat preservation, and after an interval of 30 minutes, let the air out again for 10 to 15 minutes.
2. Scientific watering
Sudden dry and wet soil is one of the reasons for fruit cracking. In addition, in winter, the ground temperature is low. Watering on a daily basis often results in a relatively large amount of water. The occurrence of symptoms such as stems. Therefore, watering should be determined according to the soil moisture, and it is generally appropriate to control it at 50% to 70%. If possible, it is recommended to use drip irrigation under the mulch to reduce the occurrence of fruit cracking.
3. Pay attention to the application of middle and trace elements
Some medium and trace elements can prevent fruit cracking, such as calcium, boron, etc. Calcium fertilizer can increase the toughness of the fruit cell wall; boron can prevent the production of cork on the surface of the fruit. Therefore, you can often supplement the leaves rich in boron and calcium. Face fertilizer, take precautions in advance. It is also possible to spray functional foliar fertilizers such as alginic acid and chitin on the leaves to improve the flexibility and resistance of the fruit and leaves, and avoid the occurrence of fruit cracking.
In addition, the selection of crack-resistant varieties in production is also a very important point to avoid tomato cracking.
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