What are the precautions for topdressing eggplant in summer?
What should be noted when topdressing eggplant in summer? Here is an introduction: when topdressing eggplant in summer, the following three points should be noted: furrow application. Vegetable growers have become accustomed to applying chemical fertilizers with irrigation water, but this method is not suitable in the high-temperature summer season, because at higher temperatures, when chemical fertilizers are applied with water, a large amount of ammonia volatilizes and reduces the effect...
What should be noted when topdressing eggplant in summer? Here is an introduction
When topdressing eggplant in summer, the following three points should be noted:
Furrow application
Vegetable growers have become accustomed to topdressing chemical fertilizers with irrigation water, but this method is not suitable in the high-temperature summer season, because at higher temperatures, when chemical fertilizers are applied with water, a large amount of ammonia volatilizes and reduces the effect. Especially with ammonium bicarbonate, it is more likely to cause ammonia poisoning in eggplant. Applying it in furrows or burying it in holes gives the best effect. After topdressing, the soil cover should be no less than 5 cm to reduce the volatilization of the effective components of the chemical fertilizer.
Pay attention to the application rate
Eggplant has the greatest demand for nitrogen fertilizer, but in the high-temperature season, it must be given "small meals more often." Each application of urea per mu should generally be controlled within 30 kg. This is because in the high-temperature season, urea transforms relatively quickly after being applied to the soil, and after the plants have met their needs, the excess portion will be lost. Especially in sandy soil, the proportion lost will be even greater. For ammonium bicarbonate, an application rate of no more than 40 kg per mu each time is more suitable. If the application rate is too large, in addition to causing nutrient loss, it will also cause ammonia damage to eggplant leaves and fruit.
Reasonable combination
Although eggplant has the greatest demand for nitrogen fertilizer, phosphorus and potassium fertilizers are also indispensable, and nitrogen-only chemical fertilizer cannot be applied every time during topdressing. During the full fruiting period, it is best to apply a three-element compound fertilizer twice, with no less than 40 kg per mu each time, to meet the needs of eggplant growth and fruiting.
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