Hollow melon, also known as empty fruit, refers to the center of watermelon fruit to form a cavity, hollow or crack, divided into two kinds of transverse and longitudinal, which will greatly affect the commercial quality of watermelon. There are many reasons for hollowness, such as uncomfortable varieties, low temperature when sitting on melons, lack of light, low fruit setting, improper fertilizer and water management, and harvesting too late, etc., all of which can cause watermelon hollow. In the cultivation should pay more attention to prevent the occurrence of hollow phenomenon. I. Improper selection of species The adaptability of different watermelon varieties to the environment is different. Some varieties are not deformed or deformed, and some varieties are not deformed under certain cultivation conditions and environmental conditions. However, in case of unfavorable environmental conditions or improper cultivation measures, they are extremely harmful. Easy to produce malformation. If the early-maturing round fruit varieties are cultivated later, hollow phenomenon is easy to occur. Second, the temperature is low when sitting melon Watermelon flowering fruit set suitable temperature 25 °C -30 °C, the minimum daily average temperature of 20 °C -21 °C. After the melons are sitting (before the hair of the young melons is unwooled), the watermelon first divides the cells, increases the number of cells in the fruits, and then quickly enlarges the fruits by expanding the cells. If the temperature is low during sitting, the speed of cell division will be slow, and the cells in the fruit will not reach enough quantity. In the later period, with the increase of temperature, the pericarp will expand rapidly, and the fruit will not be able to fill up because of insufficient cells. The space inside the fruit forms a hollow melon. In order to avoid hollowness caused by low temperature, melon farmers should strengthen the temperature management of melon fields. When temperature is not suitable, measures should be taken to increase temperature and keep warm. Third, the fruit development period of rain and sunshine Fruit development must be based on sufficient nutrients. If there are more rainy days and less light during photoperiod development, photosynthesis will be affected and the supply of nutrients will be severely deficient. This will affect the cell division and the increase of cell volume in the fruit, and the skin needs to be developed. Relatively few nutrients still develop rapidly when nutrient deficiency occurs, creating hollow melons. In addition, due to overcast rain, excessive nitrogen fertilizer application, too much rain or watering, and unsuccessful squashing, etc., causing plant growth and stem and leaf closing, not only affect photosynthesis, but also stem and leaf growth will compete with the fruit for nutrients, so that Insufficient supply of nutrients to produce hollow melons. Fourth, the fruit section is low The first female flowering melon, due to the low temperature during sitting, poor pollination and fertilization, and few seeds, coupled with the small leaf area at that time, the lack of supply of assimilation materials, the ventricular volume can not be fully increased, if the case of high temperature, the fruit Rapid expansion, so as to form a hollow melon. The melon farmers can promptly remove the first melons of the first quarter and choose to stay in the third or fourth quarter to sit on melons to avoid the hollow of the watermelon. V. Water shortage during fruit development The development of watermelon fruit not only needs sufficient nutrients, but also needs enough water (too much water is not good), if the real expansion period is severely lack of water, the cells in the fruit can not be fully expanded to form a hollow. Watermelon pollination after the fruit expansion period of severe water shortage should be timely irrigation, prevent dehydration hollow, avoid spraying hormones. Six, too ripe harvest Before maturity, the nutrients and moisture are transported to the fruits. When they are ripe, if they are not harvested in time, the nutrients and water will flow out of the fruits, and the phenomenon of reflux will occur. The fruits will be formed due to the loss of water and nutrients. Hollow. This phenomenon is more pronounced in varieties with fast fruit development. Therefore, early harvest of melons must be done in a timely manner, especially for the hollow sand pods and grafted watermelons. Frozen Raw Squid Slice Sashimi Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com