In order to prevent this situation from continuing to deteriorate, we must first improve the soil ecological conditions and scientifically and rationally apply fertilizer. First, apply enough base fertilizer. The base fertilizer of watermelon field is generally 40 kg of ecological fertilizer per mu or 5000 kg of farmyard manure, 40-50 kg of calcium magnesium phosphate, 5 kg of urea and 8-10 kg of potassium chloride. It is advisable to apply the ditch, and it can also be applied to the melon and then turned into the soil. Second, skillfully apply seedlings. In the base fertilizer, a part of the fertilizer has been applied, as long as there is no symptoms of deficiency in the seedling stage, it is not necessary to topdress. If there is less fertilizer applied to the base fertilizer, or a plot where no fertilizer is applied, the amount of fertilizer should be chased. Fertilization time is appropriate when the seedling grows to 2 true leaves, or 4 to 5 kg of urea per acre before the seedling water is poured. Seedling stage topdressing should not be too much, too close to the roots, so as not to cause dead roots. Third, chasing and spreading vines. After the watermelon melon has been stretched, the manure should be applied before the water is poured. Generally, 10 to 20 kg of ecological fertilizer is applied per mu of land, 20 to 25 kg of urea, and 10 to 12 kg of potassium sulfate. It is advisable to apply vines to the vines, but the ditch should not be too close to the melons to avoid root damage and cover the soil after fertilization. Fourth, discretion to sit on melon. Before and after the flowering of watermelon, it is a key period for sitting melon. In order to ensure the normal sitting, it is generally not necessary to topdress. However, when the young melon grows to the size of the duck egg, the watermelon enters the peak of the sucking fertilizer. If the lack of fertilizer in this period affects not only the expansion of the watermelon but also the later de-fertilization, the plant will prematurely decay, which will reduce the watermelon yield and affect the quality of the watermelon. Therefore, it is necessary to apply the melon fertilizer, generally 5~10 kg of high-concentration compound fertilizer can be applied to the water. 5. Appropriate spraying of foliar fertilizer in the later stage. After the watermelon is expanded, the ability of the roots to absorb the fertilizer has been obviously weakened. In order to make up for the lack of root fertilizer and ensure the normal maturity of the watermelon, the foliar spray can be applied, such as spraying 0.2%~0.3% urea solution.
Author: Litai Yu
Source: Henan Science and Technology News
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