How many times in total should sweet potatoes be fertilized during the entire growing period?

Sweet potato is a common crop in daily life, deeply loved by people for its good taste and diverse ways of eating. It is currently planted in many regions, so how many times in total should sweet potatoes be fertilized?

1. How many times in total should sweet potatoes be fertilized?

Sweet potatoes are fertilized about six times in total, namely before planting, seedling-promoting fertilizer, vine-strengthening fertilizer, tuber-forcing fertilizer, crack fertilizer, and foliar fertilizer. The amount required at each stage is different, so the specific amount should be determined according to the soil conditions of the sweet potato field and the growth status of the sweet potato seedlings.

2. How should sweet potatoes be fertilized?

1. Within one week after planting the sweet potato slips, replant missing seedlings. At this time, a small hole can be opened beside the sweet potato seedlings and a small amount of nitrogen fertilizer placed in it. Generally, about 3 kg of urea fertilizer per mu is sufficient. This can promote the growth of sweet potato seedlings, but the amount must be paid attention to so as not to cause seedling burn.

2. About one month after planting the sweet potato slips, the growth enters a rapid period. At this time, topdressing should be carried out in time to promote the growth of the sweet potato vines. Generally, 4 to 5 kg of ammonium nitrate per mu is applied, together with about 100 kg of plant ash. If the terrain is relatively good and the sweet potatoes grow vigorously, the fertilizer can be appropriately reduced.

3. When sweet potatoes have grown for about three months, they have entered the late growth stage. At this time, the main focus is the growth of the tubers. Anyone who grows sweet potatoes knows that the fertilizer sweet potatoes like most is potassium fertilizer, which can promote the expansion of sweet potato tubers. Therefore, during this period, the main focus is topdressing with potassium fertilizer. Plant ash can be used, and generally about 150 kg of plant ash is needed per mu. After topdressing with plant ash, it is best to irrigate the field, as this can promote better absorption of the fertilizer by the sweet potatoes.

4. In the late growth stage of sweet potatoes, foliar fertilizer can be appropriately sprayed to promote the growth of sweet potatoes. Foliar fertilizer generally uses Xi fertilizer; sweet potatoes like sandy soil, and it is generally sprayed once every two weeks, with spraying for one month being sufficient.