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The so-called watermelon hollow means that before the watermelon is ripe, the inside has formed a cavity or crack. The body of the watermelon is like a lantern. The uneven stripes run through the first and the last sections. The Guati part is obviously concave, and the finger is used to knock the "click". After cutting, the hollow and melon are in pieces, which is like a melon. Once the watermelon is hollow, the damage is irreparable, so prevention is very important.
What are the factors related to watermelon hollow?
Related to the variety. Different varieties have different adaptability to bad weather. Professional surveys have found that different watermelon varieties are planted in the same piece of watermelon land. Under the same management conditions, some varieties have hollowness, while some varieties do not. Phenomenon, this is enough to show that the watermelon hollow is related to the variety. For example, in a certain place in Hunan, there were no hollows in the varieties of “Dragon King†and “Boutiqueâ€, but only the so-called “anti-disease 851†all had hollowness, and the watermelon variety “Fengle†was planted. On the 5th, when it came to the market, it was found that the melon was a hollow melon.
It is related to the climate. The suitable temperature for the growth of watermelon is 18 °C ~ 32 °C, and there is still strong assimilation at 40 °C. However, the lower limit of the temperature in the result period is 15 °C, and the fruits developed under low temperature conditions are often abnormal, such as hollow, thick skin, and fruit shoulders. If the early-selling watermelon encounters continuous rainy weather during the expansion period, it will affect the photosynthesis for a long time. The watermelon can not effectively accumulate photosynthetic products after fruit setting, which hinders the development of watermelon; while encountering higher temperature in the later stage, the fruit will rapidly expand and thicken. And forming a hollow. When the expansion period misses the late watermelon in the low temperature stage in May, there will be no hollow phenomenon.
Related to management. The development of watermelon fruit requires not only sufficient nutrients, but also sufficient water (too much water is not good). If the fruit is severely dehydrated during the expansion period, the cells in the fruit cannot be fully expanded to form a hollow. In addition, before the ripening of watermelon, nutrients and water are continuously transported to the fruit. If it is not harvested in time, the nutrients and water will flow backwards. When it flows out of the fruit, the fruit will form due to the loss of water and nutrients. Hollow. This phenomenon is more pronounced in varieties with fast fruit development.
Management in place to prevent watermelon hollow
In order to prevent watermelon from hollowing out, it is necessary to comprehensively use cultivation measures to create an ecological environment conducive to the growth of watermelon.
Strengthen field management. In June and July of our province, it is a rainy season, and watermelon usually sits in the early June, and enters the stage of fruit ripening in the middle and late. It requires high temperature, strong light and dry weather conditions. If this stage encounters continuous rain and rain, the photosynthesis is greatly reduced, the root activity is seriously frustrated, and the flesh development cannot be carried out normally, and a large number of hollow melons will be formed. Therefore, it is necessary to pay attention to the field clearing ditch, reduce the humidity in the field, enhance the vitality of the root system, and prevent the large amount of hollow melon.
Choose a place to stay. According to the growth rule of watermelon, the melons of the first female flowers of the early and middle-maturing varieties are easy to produce hollow, thick skin, melon shape and other phenomena, while the main vine second, third female and side vine first and second female flowers The melon can be grown and matured. Therefore, generally do not leave the first female flower, not blindly early in cultivation, combined with local climatic conditions, timely sowing, so that watermelon in early June to sit on the melon, to ensure normal growth and development and can be mature in the hot July.
Coordinate and manage water and fertilizer. The expansion period of watermelon requires a lot of water and nutrients, which is very sensitive to fertilizer and water. It should be timely fertilized and fertilized. In the case of low temperature weather, heat preservation measures shall be taken, and the open field cultivation may cover the film insulation to ensure sufficient accumulation temperature during the expansion and expansion period. The addition of boron fertilizer can effectively prevent watermelon from producing hollow melon and thick melon. 100g of borax per acre, first dissolve with a small amount of hot water, add 50 kg of water, make foliar fertilizer before flowering, spray 1 or 2 times. It can also be used in the transplanting of watermelon, using 1 to 1.5 kg of borax per mu and mixing with the decomposed organic fertilizer, and then applying it as a base fertilizer.
Reasonable picking and balanced listing. If the picking is too late, it is easy to form a hollow melon. If the watermelon has been set in fruit but deformed, the deformed melon should be removed in time, and the ternary compound fertilizer should be added to promote the branching of the watermelon, grow vigorously, and re-fruit. For watermelons that are fruiting but are planted late, the first section of the young melon should be removed in time, and the third or fourth node should be selected to take the fruit to avoid hollowing the watermelon. After the watermelon is pollinated, the melon field with severe water shortage during the fruit expansion period should be properly irrigated in time to prevent dehydration and form hollow, avoiding the spraying of hormones.
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