During the process of watermelon cultivation, due to weather, management and other reasons, there will be hollow watermelon phenomenon, resulting in decreased cultivation efficiency of watermelon. Therefore, in the cultivation process, it is necessary to analyze the cause of the hollow and make corresponding prevention measures. Watermelon expert Quan Zhijun of the College of Horticulture, Northwest Agriculture and Forestry University, analyzes the hollowness of the watermelon in the following aspects.
The temperature is lower, the suitable temperature for flowering and setting of watermelon is 25-30°C, and the lowest daily average temperature is 20-21°C. If the temperature is too low when fruit is set, the speed of cell division will slow down and the number of cells in the fruit will not reach a sufficient quantity. With the increase of temperature, the pericarp will swell rapidly, and the fruits cannot fill the fruit due to insufficient cells. The space inside is hollow.
According to the fruit development of rain and sunshine, there must be sufficient nutrients for the development. If there are more rainy days and less light during the actual development period, photosynthesis will be affected, resulting in a serious shortage of nutrient supply, thus forming a hollow.
Excessive application of water and fertilizers. Excessive application of nitrogenous fertilizers, excessive rainfall or excessive watering, and unsuccessful squashing may cause crops to grow in length and cover the leaves and leaves, affecting photosynthesis, and stem and leaf growth and fruit competition for nutrients, as well as fruit nutrients. The supply shortage appears hollow.
Development of water-deficient watermelon fruit requires not only sufficient nutrients, but also sufficient water (too much water is not good). If the water is severely dehydrated during the expansion period, the cells in the fruit cannot be fully expanded to form a hollow.
Over-harvesting for the reasons above watermelon hollow, experts gave the following prevention and control measures: 1, the watermelon has set fruit but there is malformed melon, should remove the deformed melon in time, increase ternary compound fertilizer, promote watermelon branching, growth Robust, re-seat fruit. 2. For watermelons that are sitting but ripe for sowing, we must promptly remove the first quarter of the young melon, and choose to stay in the third or fourth quarter to sit and avoid the watermelon hollow. 3, watermelon pollination after the fruit expansion period of severe water shortage of melon field, should be timely and appropriate irrigation, prevent the formation of hollow dehydration, to avoid spraying hormones.
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