Sweet potato fertilization method

First, the base fertilizer should be based on high quality organic fertilizer. Sandy soils have poor water retention and fertilizer retention capacity. It is advisable to use semi-humic organic fertilizers as base fertilizers; clay soils should be applied to decomposed organic fertilizers. Phosphate and potassium fertilizers can also be applied simultaneously with the base fertilizer.

Second, topdressing If the amount of nitrogen applied to the base fertilizer is insufficient, it should be topdressed in the same period, and in the medium term. The specific topdressing time should be flexible. If the soil is dry when planting, the temperature is low, and the potato seedlings are weak, the seedling fertilizer can be picked up early. In the potato-forming period, if the vine grows poorly and the leaves are small, the plant fertilizer should be pursued early. Entering the rapid expansion period of potato chips, if the vines are prematurely aging, the nitrogen fertilizer can be traced 1 or 2 times, and the dosage is determined according to the climatic conditions and the seedling condition. In the expansion period of potato tubers, if the drought occurs, the vines and leaves turn yellow earlier, and when the yellow leaves increase, more manure water should be applied; if the soil is wet, the rain is more, the vines and leaves turn yellow, more grass ash can be applied. .

In addition, it should be noted that the sand soil should be applied in small quantities several times. Where the water source is sufficient, the amount of nitrogen fertilizer should be controlled.

Excerpted from: Henan Science and Technology News
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