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In order to improve the fruit set rate of watermelon, the following measures should be taken: (1) Proper close planting ensures good ventilation and light transmission. (2) The key to coordinating vegetative growth and reproductive growth. Whether it is the madness caused by the excessive growth of stems and leaves, or the dwarfness of plants caused by too weak growth, they all lead to flowering and melons. Therefore, do not apply partial nitrogen fertilizer, flowering results should be controlled fertilization; if the plant growth is weak, ovary thin, can be applied to the root dressing, increase plant growth, promote flowering and fruit setting. (3) Create a suitable temperature. The optimum temperature for the watermelon fruit set is 25°C, and the minimum limit is 18°C. Otherwise, the fruit setting rate is low and it is easy to produce deformed fruit. Therefore, all kinds of measures should be adopted to make the watermelon in the fruiting period in the environment of 25°C, cultivated in early spring, and in the flowering period to increase the temperature, but to prevent high temperature and high humidity. (4) Increase lighting. To increase the light intensity in order to improve the fruit setting rate. If it is necessary to protect the cultivation of the cover, if the temperature condition allows, the cover film can be opened as much as possible to reduce the cover, so that the watermelon plant can receive the light as much as possible. (5) Artificially assisted pollination. Watermelon often has poor fruit setting rate due to poor pollination, and artificially assisted pollination can significantly increase fruit setting rate. (6) Reasonable pruning. Generally, 2~3 vines are left in the watermelon. (8) Hormones protect melons. For cultivars that are difficult to set up or grow because of improper cultivation and management, use cantaloupe growth regulators during flowering and fruit setting.
Water Melon Cracking Prevention
Watermelon likes high temperature, dryness and sufficient light, especially in the flowering fruit setting and development period, the requirements on temperature, humidity and light are more stringent. Watermelon sits fruit period, this period of time is strict to the environmental condition, the main reason that influences makes melon has the following several aspects: (1) did not complete the pollination to fertilize. If you encounter cold weather, rain, and other adverse weather during flowering, it will affect the normal pollination and fertilization, causing melon. (2) Insufficient light. Lack of low-temperature light can cause poor organ development, weakening of plant growth, and can also cause melon due to malnutrition. (3) Insufficient moisture. In the flowering period, if the water is insufficient, the obstruction of female ovary development will also affect the sitting fruit. (4) During the growth period of watermelon, especially in the fruiting period, more nitrogen fertilizer will cause vegetative overgrowth, nutrient supply for flowers and fruits will be relatively reduced, and young larvae will fall off due to insufficient nutrition. (5) The density is too large. Planting density, lack of light, excessive nutrition growth, affecting reproductive growth, easy to sit melon. (6) High temperature and high humidity. The temperature is high, humidity is high, and plant growth is prone to excessive growth in protected cultivation, resulting in madness and difficulty in sitting on melons.