The Latest Fertilization Methods and Technical Key Points for Onions

Onions are a nutrient-rich vegetable and are widely grown in our country. In the process of growing onions, in order to promote high yield and high quality, scientific fertilization techniques are a very key step. So do you know how onions should be fertilized? Today the editor brings everyone an introduction to onion fertilization techniques, and you can take a brief look.

1. Seedling fertilizer

Onion seedling fertilizer is the fertilizer applied during the seedling-raising period. Onion seedlings grow relatively slowly, so before raising seedlings we need to apply seedling fertilizer well. Seedling fertilizer is mainly based on farmyard manure and has three or four jin of phosphate fertilizer added, and it should be spread evenly over the seedling bed, then turned into the soil and mixed thoroughly. After the onions are sown, we should combine this with watering for topdressing, mainly by watering with manure and urine water mixed with a small amount of quick-acting nitrogen fertilizer, to promote the growth and development of the seedlings.

2. Base fertilizer

Base fertilizer, also called bottom fertilizer, is generally applied before transplanting, and the bottom fertilizer must be applied in sufficient quantity, as it is one of the basic conditions for onion growth. Under normal circumstances, the amount of bottom fertilizer required per mu is about six hundred jin. The bottom fertilizer is mainly the onion-specific fertilizer Dongliw​​ang, supplemented with sixty jin of high-potassium compound fertilizer and fifty jin of phosphate fertilizer, applied together with land preparation, so that nutrients are balanced and the soil is improved.

3. Topdressing

Topdressing onions in the later stage is also very important, and it is generally done in three to four applications. The first is about seven to ten days after transplanting, also called seedling recovery fertilizer; this time it is mainly watered with manure and urine water, and an appropriate amount of ammonium sulfate fertilizer can also be added at the same time. The second topdressing is generally one month after transplanting, which is about the time of early spring, and this is also called green-returning fertilizer or plant-development fertilizer. In order to promote the growth of onion stems and leaves, high-nitrogen-potassium water-soluble fertilizer is mainly used, or manure and urine water is used for flushing application. The last topdressing is carried out in the early stage of the growth and enlargement of the underground bulb of the onion, mainly to promote the enlargement of the underground bulb, and it is also called bulb-promoting fertilizer. During this period, potassium fertilizer is mainly used, combined with a small amount of nitrogen fertilizer for watering application.

4. Supplementary fertilizer

Many people do not understand supplementary fertilization for onions. It is mainly a kind of fertilization used to supplement some nutrient deficiency phenomena that appear during the growth of onions. For example, when the stems and leaves of onions turn yellow, or heart rot, root rot, or hooking appears, this indicates that the onions lack some trace element fertilizer during growth, so after topdressing we need to carry out supplementary fertilization. For example, supplement fertilizers such as calcium, potassium, and magnesium.

The above is the introduction to onion fertilization techniques brought to you by the editor. We hope everyone can gain something from the content above. If you have other questions to consult during later planting, remember to leave us a message, and the editor will reply immediately after receiving it.

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