How to fertilize onions

Onion is a nutritious vegetable, which is widely cultivated in our country. In the process of onion planting, in order to promote the high yield and high quality of onion, scientific fertilization technology is a very key step. So do you know how to fertilize onions? Today, the editor has brought you an introduction to the fertilization technology of onions, which you can simply understand.

1. Seedling fertilizer

Onion seedling fertilizer is the fertilization during the seedling period, onion seedlings grow slowly, in the seedling money we need to apply good seedling fertilizer. Seedling fertilizer is mainly based on soil fertilizer and add three or four jin of phosphate fertilizer, should be evenly scattered in the seedling field, and turned into the soil to mix well. After onion sowing, we need to add water to top dressing, mainly to irrigate feces and urine with a small amount of available nitrogen fertilizer to promote the growth and development of seedlings.

2. Base fertilizer

Base fertilizer, that is, base fertilizer, is generally carried out before planting, and the base fertilizer must be fully applied, which is one of the basic conditions for the growth of onions. Under normal circumstances, the amount of base fertilizer required per mu is about 600 jin. Among them, the base fertilizer is mainly the special fertilizer king of onion, and 60 jin of high potassium compound fertilizer and 50 jin of phosphate fertilizer are used for soil preparation, which can balance nutrients and improve soil quality.

3. Topdressing

The late topdressing of onions is also very important, usually in three to four times. The first time is about seven to ten days after planting, also known as slow seedling fertilizer, this time it is mainly watered with feces and urine, and an appropriate amount of ammonium sulfate fertilizer can also be added in the middle. The second topdressing is usually a month after planting, about a month at the beginning of spring, which is also known as returning to green fertilizer or fat. In order to promote the growth of onion stems and leaves, it is mainly to use high nitrogen potassium flushing fertilizer, or using feces and urine water for flushing. Finally, topdressing is carried out in the initial stage of onion underground bulb growth, mainly to promote the growth of underground bulbs, also known as head fertilizer, during this period is mainly potash fertilizer, combined with a small amount of nitrogen fertilizer.

4. Replenish fertilizer

Many people do not know about the replenishment of onions, which is mainly suitable for fertilization to supplement the lack of fertilizer in the growth process of onions. For example, when onion stems and leaves appear yellowing, heart rot, root rot or inverted hook, this shows that onion lacks some trace element fertilizer in the process of growth, so we need supplementary fertilization after topdressing. For example, supplement calcium, potassium, magnesium and other fertilizers.

The above is the introduction of the fertilization technology of onion brought by the editor. I hope you can get something from the above. If you have any other questions to consult in the later planting process, please remember to leave us a message and the editor will reply to you immediately after receiving it.