How to water watermelon according to the law of water demand

Watermelon needs less water at seedling stage, so watering times and amount can be reduced appropriately in the early stage. When planting, it is generally necessary to water the soles of the feet, and watering can be stopped at seedling stage. If you encounter drought, you can properly water a small amount. When transplanting, if the bottom water is insufficient, you can not seal the nest after watering the fixed planting water, and water the seedlings again the next day, and then seal the nest. The principle that the soil dries when it is wet should be mastered during the vine extension period, that is, the soil is wet in the morning, dry and white at noon, and the soil is still wet the next day after the resurgence in the evening. At the end of the vine, watering should be controlled near flowering. Watermelon needs a lot of water when it enters the fruit expansion stage after depilation. At the same time, the temperature rises, and the ground evaporation and transpiration are relatively large. Therefore, during this period, sufficient soil moisture supply must be ensured to promote fruit development. If there is water shortage and drought at this time, it will affect the yield of watermelon. When the watermelon is depilated, it should be watered once, and then every 5-7 days. After watermelon is fixed, the volume and weight rarely increase, mainly because of the sugar transformation inside the fruit. At this time, watering should be controlled and stopped 7 days before harvest to improve watermelon quality and reduce fruit cracking.