Top dressing is a fertilization method in which a chemical fertilizer or a trace element dilution is sprayed on the leaf surface and absorbed by the plant through the leaf stomata, so it is also called foliar fertilization.
The advantage of top dressing is that the dosage is small, the fertilizer effect is rapid and significant, and the fertilizer is not fixed by the soil, and is not affected by the root absorption function.
Usually, the inorganic fertilizer is sprayed on the foliar surface, and it can be absorbed in 5 hours after spraying. It can be absorbed 50%-75% within 24 hours, and the fertilizer effect lasts for 7-10 days. Therefore, the external top dressing should be sprayed once every 7-10 days. .
In addition to the flowering period, the root dressing can be carried out at other times, but usually the root dressing is carried out when the flowers and trees grow vigorously or lack certain elements.
The advantage of top dressing is that the dosage is small, the fertilizer effect is rapid and significant, and the fertilizer is not fixed by the soil, and is not affected by the root absorption function.
Usually, the inorganic fertilizer is sprayed on the foliar surface, and it can be absorbed in 5 hours after spraying. It can be absorbed 50%-75% within 24 hours, and the fertilizer effect lasts for 7-10 days. Therefore, the external top dressing should be sprayed once every 7-10 days. .
In addition to the flowering period, the root dressing can be carried out at other times, but usually the root dressing is carried out when the flowers and trees grow vigorously or lack certain elements.
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