The so-called "watermelon hollow" refers to the fact that before the ripening of watermelon, hollows or cracks have been formed in the interior of the watermelon. The body of the fruit is like a lantern. The striated stripes run through the first and the last two paragraphs. After the incision, hollow, melons into pieces, like a melon. Once the watermelon is hollow, the damage caused is irreparable, so prevention is very important.
What are the factors related to hollow watermelon
Related to the species. Different breeds have different adaptability to bad weather. The professional survey found that in the same watermelon field, planting different watermelon varieties, under the same management conditions, some varieties appear hollow phenomenon, and some varieties do not appear this kind of Phenomenon, which is enough to explain the watermelon hollow and variety. For example, in a certain place in Hunan, there have been lands in the same place, such as “Dragon King†and “Boutiqueâ€, and only the so-called “resistance-resistant 851†has all appeared a hollow phenomenon. The planted watermelon variety “Fengle†On the 5th, when it came to the market, it was found that the melons were all melons.
Related to climate. Appropriate temperature for the growth of watermelon is 18 °C ~ 32 °C, 40 °C still has a strong assimilation. However, the lower limit of the temperature in the result period was 15°C. The fruits developed under low temperature conditions were often abnormal, such as hollow, thick skin, and fruit shoulder. If the early sowing watermelon meets continuous rainy weather during the expansion period, a long time low temperature and oligo illumination will affect the photosynthesis, and watermelon can not effectively accumulate photosynthetic products after fruiting, which will hinder the development of watermelon. In the later period, encountering higher temperature will make the pericarp expand rapidly and thicken. And forming a hollow. A late-seeded watermelon that missed the low-temperature period in May during the expansion period will not appear hollow.
Related to management. The development of watermelon fruit not only needs sufficient nutrients, but also needs enough water (too much water is not good), if the fruit is severely short of water during the expansion, the cells in the fruit can not be fully expanded to form a hollow. In addition, before ripening, the nutrients and moisture are continuously transported to the fruits of the watermelons. If they are not harvested in time, the nutrients and water will flow backwards. The fruits will flow out of the fruits and lose their water and nutrients. Hollow. This phenomenon is more pronounced in varieties with fast fruit development.
Management puts an end to watermelon hollow
In order to prevent the hollow of the watermelon, comprehensive cultivation measures should be used to create an ecological environment conducive to the growth of watermelon.
Strengthen field management. In June and July in our province, it is a rainy season, while watermelons generally sit in early June and go into fruit ripening stage in the middle and late, requiring high temperature, strong light and dry weather conditions. If this stage encounters continuous and rainy weather, photosynthesis is greatly reduced, root activity is severely frustrated, and flesh development does not proceed normally, a large number of hollow melons will be formed. Therefore, we must pay attention to the pits in the field, reduce the humidity in the field, enhance the vitality of the roots, and prevent the production of hollow melons.
Choose to stay guava. According to the growth pattern of watermelon, the melons of the first female flower of the early and middle-maturing variety are very likely to produce hollow, thick skin, and irregular melons, while the second and third female flowers of the main vine and the first and second female flowers of the lateral vines. Squash can grow and mature normally. Therefore, generally do not leave the first female flowers, not blindly earlier in the cultivation, to combine local climatic conditions, timely sowing, so that the watermelon in early June to sit, to ensure normal growth and development and can be listed in the hot mid-July maturity.
Overall management of water and fertilizer. Watermelon enlargement requires a lot of water and nutrients, is very sensitive to fertilizer and water, timely irrigation and fertilization. When cold weather occurs, insulation measures are taken to cover the temperature of the ground-covered film to ensure that the result and the temperature during the expansion period are sufficient. The application of boron fertilizer can effectively prevent watermelon from producing hollow melon and thick skin melon. 100 grams of borax per acre each time, first with a small amount of hot water dissolved, plus 50 kg of water, before the flowering foliar fertilizer, spraying 1 or 2 times. Can also be transplanted in the watermelon, 1 ~ 1.5 kg of borax per acre and decomposed organic fertilizer mix, as the base fertilizer applied to the hole.
Reasonable picking, balanced listing. If the picking is too late, it is easy to form a hollow melon. For watermelons that have taken fruit but are deformed, the deformed melons should be promptly removed, and the ternary compound fertilizer should be increased to promote the branching of the watermelons, grow robustly, and re-establish fruit setting. For watermelons that are sitting but ripe for sowing, we must promptly remove the first bit of the young melon and choose to stay in the third or fourth quarter to sit and avoid the watermelon hollow. Watermelon pollination of watermelon after fruiting period is seriously short of water should be promptly appropriate irrigation, to prevent dehydration hollow, avoid spraying hormones.
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