Watermelon wilt and anthracnose are more common in watermelons, especially in heavy-duty plots with low-lying terrain, poor drainage, excessive application of nitrogen fertilizer, and poor ventilation. At present, some melon farmers have a large blindness in fertilization. The melon farmers have the misunderstanding of “dung water, no need to ask people†and the idea of ​​re-application of nitrogen fertilizer, phosphate fertilizer, ignoring potash fertilizer and ignoring micro-fertilizer. Due to the deficiency of potassium fertilizer and some trace elements, the absorption and utilization of nitrogen and phosphorus in watermelons are impeded, and the imbalance of nutrients in the soil, soil compaction, soil conditions of watermelon growth are seriously damaged, resulting in more and more watermelon diseases and insect pests. serious.
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 seedlings grow to 2 true leaves, or 4 to 5 kg of urea per acre before pouring the seedling water. 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 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 significantly weakened. In order to make up for the lack of root fertilizer and ensure the normal maturity of the watermelon, foliar spraying and topdressing can be carried out, such as spraying 0.2%-0.3% urea solution.
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 seedlings grow to 2 true leaves, or 4 to 5 kg of urea per acre before pouring the seedling water. 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 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 significantly weakened. In order to make up for the lack of root fertilizer and ensure the normal maturity of the watermelon, foliar spraying and topdressing can be carried out, such as spraying 0.2%-0.3% urea solution.
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