1, right amount. Eggplant requires the largest amount of nitrogen fertilizer, but in high temperature season, the application of urea per acre should generally be controlled within 30 kilograms, because the high temperature season, the transformation rate of urea into the soil is faster, after the plants meet the needs, the excess will cause Loss. Especially sandy soil, the proportion of loss will be greater. The amount of ammonium bicarbonate used per acre is not more than 40 kg. The amount of application is too large. In addition to the loss of nutrients, it will also cause ammonia damage to the leaves and leaves of eggplant.
2, law. It is customary for vegetable farmers to use chemical fertilizers with water, but this method should not be used in summer hot season. Because the temperature is higher, when the chemical fertilizer is flushed, a large amount of ammonia volatilizes will reduce the fertilizer efficiency, especially ammonium bicarbonate, which is more likely to cause eggplant ammonia poisoning. The use of furrows or hole application works best. The thickness of the buried soil after dressing should be not less than 5 cm to reduce the volatilization of the active ingredients of the fertilizer.
3, a reasonable match. Although eggplant is the most demanding nitrogen fertilizer, phosphorus and potassium fertilizers are indispensable, and topdressing nitrogen fertilizers cannot be topdressed each time. In the full fruit period, it is advisable to top up the application of ternary compound fertilizer twice, and the total of 2 times per mu should be not less than 40 kg to meet the needs of eggplant growth and results.
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