The varieties cultivated in greenhouses are mostly early-maturing varieties, which creates time conditions for the watermelons to recolonize. According to the test, when the head of the watermelon is picked, the new vines can be grown 7-10 days after the old vines are cut, and the second pods can be harvested at 40-45 days, yielding 1500 kg per 667 square meters. The benefits are considerable. 1, the new mango cultivating watermelon secondary melon should adopt cutting vine regeneration method, that is, after the head of melons harvested, cut away the old vines from the root of 30 --- 35 centimeters, the use of latent buds after the germination of the base leaf buds Or stay in the old vine's base 1 --- 2 robust new vines, the rest cut off. In this way, the position of the melons is low and the vines grow rapidly and vigorously. The watermelon has a fast maturation, a large melon, and a high yield, which is 500-600 kg more per 667 square meters than other methods. 2. High-yield measures (1) Protect the root system. In the process of fertilizing, watering, and weeding of the head gourd, carefully and carefully protect the root system so that the root system will not be injured and grow normally and robustly. (2) fertilizer and water management. The head gourd was applied with a fast-acting nitrogen fertilizer 3 days before harvest, generally 15 - 20g urea per plant. Watermelon is watered promptly after harvest to promote the growth of new vines, expand the leaf area, and create conditions for fruiting. When the plant has 80% fruit set, apply fertilizer again. General application of potassium sulfate 10 kg, potassium dihydrogen phosphate 10 kg, 5 kg of urea or organic decomposition 500 kg full, 20 kg of compound fertilizer. (3) Clearing the garden to prevent disease. Before harvesting, the head pods were cleared of field weeds, rotten melons, diseased plants, residual leaves and leftover melons in a timely manner, and sprayed for 2 to 3 times 500 times carbendazim or 600 times chlorothalonil and 0,2% continuously. Urea to prevent diseases. The old melons that are cut off must be transported out of the field in time and the melon fields should be cleaned up. (4) Fresh pruning. Generally use a method to leave a melon, because the plant to cut the old vine, the new mango strong, fast, the result is more. In order not to affect the normal growth of the selected melons, the rapid expansion of the two melons and the early maturation of the vines and the vines and small fruits after cutting the vines are all cut off, so that the nutrients are supplied in a concentrated manner.
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