The Latest Field Management Techniques and Methods Tutorial for Onion Cultivation

Onion is a strongly flavored vegetable, and spring is the peak season for onion growth. Field management is the key to high yield and high quality in onions, so how should we carry out field management in spring to promote onion growth? Recently, quite a few friends have been asking online, wanting to learn about onion cultivation and management techniques. In response to everyone's needs, the editor has brought you an introduction to the key points of field management techniques for onions. Let's take a look below.

1. Watering

Onions are generally planted in autumn. After planting, we should water with wintering water to ensure the onions safely overwinter. Onions basically enter the reviving stage in mid-March, so we need to grasp the timing of watering well. Generally, the reviving water is applied around Qingming Festival. Then, as the temperature gradually rises, the onions enter the vigorous growth stage. At this time, our main purpose is to promote the growth of onion leaves, and we usually water about once every ten days. After the onions undergo seedling restraining, that is, when they enter the bulb expansion stage, their water demand increases. During this period, watering is generally done about once every five days. Finally, note that as the harvest period approaches, we should appropriately reduce the amount of watering and gradually stop watering.

2. Fertilizing

Onion fertilization should be carried out in stages, which is beneficial to onion growth. Generally, after base fertilizer is applied to onions, there is no need for early-stage topdressing, but when the plants grow vigorously, topdressing should be done in time, mainly with organic fertilizer, with the amount controlled at about four thousand jin per mu, combined with phosphorus and potassium fertilizer. When fertilizing, do not apply too much nitrogen fertilizer alone, so as to avoid excessive leaf growth and early bolting. The second topdressing is during the bulb expansion stage. At this time, the fertilizer demand is relatively large, and we mainly use phosphorus and potassium fertilizer, which can promote the enlargement of the underground part.

3. Earthing Up

During the cultivation process, onions should be appropriately cultivated and earthed up, which helps enhance soil permeability, improve nutrient utilization, and thereby promote bulb expansion and increase bulb yield. During the onion seedling stage, loosening the soil should be done more frequently, generally about four times. When the onion enters the stem and leaf growth period, we should appropriately reduce the frequency, generally two times is enough. Finally, note that when loosening and earthing up the soil, it is best to cultivate shallowly, so as not to damage the underground bulbs of the onions and affect onion quality.

4. Removing Bolting Stems

During the growth process, onions may bolt early. In order to increase onion yield, we need to take certain remedial measures. First, when flower buds appear on the onions, we should remove them before flower heads form, but they should not be removed too early, otherwise it will also affect onion growth. At this stage, it is best to use the methods of removing buds and splitting bolting stems, which can reduce damage to the onions, promote the growth of side buds, and play a role in swelling the underground bulbs.

5. Disease and Pest Prevention

The main diseases of onions are leaf blight and purple blotch. We should carry out timely prevention and control, and it is best to use crop rotation rather than continuous cropping. Second, when planting, carbendazim can be used for seed dressing. In the early stage of disease outbreak, chlorothalonil or mancozeb can be used for spraying control. Finally, attention should also be paid to the harm of thrips and bean seed flies, which can be sprayed and killed with deltamethrin.

The above is the introduction to field management techniques for onion cultivation brought to you by the editor. After reading the above, I believe it can be of some help to everyone. The editor also wishes everyone high yields year after year.