1. The post-fertilization delay of small watermelons requires less fertilizer, and the growth period is shorter when the cultivation is delayed in autumn. On the basis of applying the base fertilizer, there is less post-fertilization in the late stage. Generally, only the potassium sulfate and urea or the three-element compound are lightly chased during the expansion of the melon. fat. In the later stage, foliar spray fertilizer was used to supplement nutrients. The specific method is: when the young fruit is stable and grows to the size of the egg, depending on the growth of the plant, 10 to 15 kg of potassium sulfate per 667 m 2 , 10 to 15 kg of urea, or 15 to 20 kg of three-element compound fertilizer. After that, every 5 to 7 days, the foliar fertilizer will be sprayed once, and the special foliar fertilizer such as Foliage can be sprayed, and Flotte can be sprayed. It can also spray 0.2% to 0.3% potassium dihydrogen phosphate to improve the quality and promote early maturity. 2. Watering in the autumn, the watermelon often encounters high temperature and drought during the growth period, and the plant transpiration is large. In order to reduce the influence of high temperature and drought, timely irrigation should be paid attention to, especially before and after the opening of the female flower and the fruit expansion period, it is very sensitive to the water reaction. Then, the young leaves of the vines became thinner and the leaves turned gray-green. At noon observation, the leaves of the plants wilted and drooped. When the flowering and fruiting period is short of water, the fruit development is hindered, the yield is low, and the quality is poor. Therefore, according to the weather conditions and plant appearance, water should be timely to ensure the plant grows robustly. When the temperature is high in the early stage, the watering should be carried out in the morning and evening. The watering amount should be 5-8 cm away from the ridge (畦) surface. The excess water after the pouring is immediately removed to keep the surface dry and avoid flooding. . After entering the fruit expansion period, the temperature will gradually decrease, and the watering should be carried out at 9 to 11 am. The water volume should not be too large, and the water can be poured in the small ditch. In August and September, in addition to drought, there will be sudden heavy rains, causing rain and rain. Because the greenhouse has not been buckled in the early stage, it should be drained and flooded in time after the rain so that the time in the field does not exceed 10 hours. If there are conditions, you can immediately use the cool groundwater to carry out the “steaming garden†to reduce the ground temperature and supplement the plant rhizosphere with oxygen. 3. It is easy to control the small watermelons, and the fertilizer should be properly controlled before the plants are flowered and placed. If the length of the main vine has grown, 5 to 8 cm at the main vine growth point, crush the melon vine or circulate the melon, to delay the growth rate of the vine, promote the development of the female flower, and increase the rate of sitting.
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