The latest course of field management techniques and methods for onion planting

Onion is a kind of heavy-flavored vegetable, and spring is the peak season for onion growth. Field management is the key to high yield and high quality of onion, so how can we carry out field management in spring to promote the growth of onion? Recently, many friends have consulted online and want to understand the planting management technology of onions. In view of everyone's needs, the editor has brought you an introduction to the key technical points of field management of onions. Let's take a look.

1. Watering

Onions are usually planted in autumn. After planting, we have to pour water over the winter to ensure that the onions survive the winter safely. Onions enter the green period is basically mid-March, then we need to grasp the time of watering, generally before and after Ching Ming Festival pouring green water. Then, as the temperature slowly picks up, onions enter a period of peak growth, when we mainly promote the growth of onion leaves, usually watering every ten days or so. After the onion squats, that is, it enters the bulb expansion stage, its demand for water increases, which is usually watered every five days or so. Finally, we should pay attention to the approaching harvest time, we should appropriately reduce the amount of water, and gradually stop watering.

2. Fertilization

Onion fertilization should be carried out in stages, which is beneficial to the growth of onions. Generally speaking, onions do not need to apply early fertilizer after applying base fertilizer, but when the plant is growing vigorously, topdressing should be done in time, mainly with organic fertilizer, the amount of fertilizer per mu should be controlled at about 4,000 jin, and combined with phosphorus and potassium fertilizer. When fertilizing, nitrogen fertilizer should not be applied partially, so as to avoid excessive growth of leaves and early smoking. The second topdressing is in the bulb expansion period, when the fertilizer demand is relatively large, we are mainly phosphorus and potassium fertilizer, which can promote the growth of the underground part.

3. Cultivate the soil

In the process of planting, it is necessary to cultivate the soil properly for onions, which is beneficial to enhance the permeability of the soil and improve the utilization rate of nutrients, thus promoting the expansion of the bulb and increasing the yield of the bulb. During the period of onion seedlings, it is necessary to loosen the soil frequently and quickly, which usually needs to be carried out about four times. when the onion stems and leaves grow, we should appropriately reduce the number of times, usually twice. Finally, it should be noted that when loosening the soil and cultivating the soil, it is best to plough it lightly so as not to go up to the onion underground bulb and affect the quality of the onion.

4. Removing bolting

In the process of onion growth, early extraction may occur. In order to increase the yield of onion, we need to take some remedial measures. First of all, when onions appear in buds, we should remove them before forming a flower ball, but we should not remove them prematurely, otherwise it will have an effect on the growth of onions. At this stage, it is best to pick buds and split bolts, which can reduce the damage to onions, promote the growth of lateral buds and inflate the underground bulbs.

5. Prevent diseases and insect pests

The most important diseases of onions are leaf blight and purple spot. We should control them in time. It is best to use crop rotation instead of continuous cropping. Secondly, when planting, you can use carbendazim to mix seeds, and in the early stage of the disease, you can use chlorothalonil or mancozeb for spray control. Finally, we should also pay attention to the harm of thrips and seed flies, which can be sprayed with deltamethrin.

The above is the introduction of the field management technology of onion planting brought by the editor. Through the reading above, I believe it can play a certain role for everyone. I also wish you all a high yield year after year.