1. Groove fertilization is not suitable for flushing with water in the hot season in summer. Because the temperature is higher, when flushing fertilizer, a large amount of ammonia gas will reduce the effect. Especially ammonium bicarbonate is more likely to cause eggplant ammonia poisoning. It is best to use trenching or burrowing. The thickness of the buried soil after top dressing should be no less than 5 cm to reduce the volatilization of the active ingredients of fertilizers.
2. Pay attention to the maximum amount of nitrogen fertilizer required for eggplant, but in the high temperature season, you must "eat less and eat more meals." Each application of urea per acre should generally be controlled within 30 kg. Because of the high temperature season, the conversion rate of urea applied to the soil is relatively fast. After the plant meets the needs, the excess part will cause loss. Especially for sandy soils, the loss rate will be greater. The application amount of ammonium bicarbonate per mu per mu is more than 40 kg. If the application amount is too large, in addition to nutrient loss, it will also cause ammonia damage to the eggplant leaves and fruits.
3. Reasonable collocation of eggplant Although nitrogen fertilizer needs a large amount, phosphorus and potassium fertilizers are also indispensable. When top dressing, you can not only apply nitrogen fertilizer every time. It is best to apply ternary compound fertilizer twice during the fruit growing period, each time topdressing fertilizer is no less than 40 kg to meet the needs of eggplant growth and fruiting.
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