What fertilizer should be used as base fertilizer for green onions? What fertilizer is best for top dressing?

The role of green onion base fertilizer

When planting green onions, sufficient base fertilizer can provide sufficient nutrients for the green onions during their growth period, improve the loose structure of the soil, and enhance soil fertility. The time to apply base fertilizer to green onions is after the previous crop is harvested and the field is cleaned and the land is prepared.

How to apply base fertilizer for green onions

1. Choose base fertilizer

The base fertilizer for green onions should be fully decomposed farm manure or other organic fertilizer. Be careful not to use fresh, undecomposed farm manure, otherwise it will cause root rot and affect the yield and quality of green onions.

2. Amount of base fertilizer

When applying base fertilizer, first use the method of spreading it all over and then applying it in the furrows. Generally, about 4,000 kg of farm manure is applied per mu of land. After deep plowing, the soil and fertilizer are mixed evenly. After leveling, dig furrows, apply about 120 kg of cake fertilizer per mu, and then mix the soil and fertilizer evenly.

How to apply base fertilizer to green onions

1. During the growth process of green onions, topdressing is required about three times. After the beginning of autumn, topdressing is required immediately, applying about 4,000 kilograms of soil and miscellaneous fertilizers per mu of land, hoeing the land, and watering.

2. Around the beginning of summer, carry out the second topdressing, applying about 700 kg of decomposed manure per mu of land, or about 100 kg of wood ash, about 30 kg of ammonium humate and about 30 kg of superphosphate per mu of land.

3. The third topdressing is probably during the White Dew season, when about 20 kg of urea fertilizer is applied per mu of land.