Summer eggplant skillful top dressing
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The amount of scientific eggplant needs a large amount of nitrogen fertilizer during the fruiting period, but in high temperature weather conditions, the "small number of times" fertilization method should be adopted. Under high temperature conditions, the conversion speed of urea after being applied to the soil is relatively fast, and the excess will be lost after the plant meets the needs. Generally, the topdressing is performed once every 7 days, 10-15 kg of urea per acre, or 10-15 kg of dragon light. Excessive application rate, in addition to causing nutrient loss, will also cause ammonia damage to eggplant leaves and fruits.
Methods It is necessary to scientifically many vegetable farmers have the habit of applying water, but this method should not be used under high temperature conditions. Because of the higher temperature, nitrogen fertilizers, especially ammonium bicarbonate, are easily decomposed and volatilized, and the ammonia produced by decomposition not only reduces the fertilizer efficiency, but also easily causes eggplant ammonia poisoning. Therefore, when applying urea, ammonium bicarbonate, ammonium sulfate and other fertilizers, it is necessary to adopt a ditch or a hole application method. The depth is not less than 5 cm, in order to reduce the volatilization of the active ingredients of the fertilizer, watering in time after topdressing.
Formulation of fertilization Although eggplant requires a large amount of nitrogen fertilizer, phosphorus and potassium fertilizers are also indispensable. In the topdressing, it is not possible to apply nitrogen fertilizer every time. In the fruit-bearing period, it is necessary to apply phosphorus and potassium fertilizer 2~3 times, preferably with ternary compound fertilizer. It can also be diluted with 300-500 times of water by using the dragon-light true root with the true-aid drip irrigation fertilizer to meet the eggplant growth. The need for the results can also play a role in improving the quality of the solanaceous fruit.
(Zhang Mingjun, Agricultural Bureau of Jixian County, Hebei Province)
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