What are the benefits of transplanting onions? What are the technical points?

Onion is one of the vegetables we often eat, which is widely planted in various places, with the characteristics of low input, high yield and easy management. it is one of the first choices for vegetable farmers to optimize planting structure and develop efficient agriculture. What are the benefits of transplanting onions? What are the technical points?

What are the benefits of transplanting onions with medicine?

1. It can control or reduce the occurrence of soil-borne diseases such as onion root rot at seedling stage.

2. It can control or reduce the harm of underground pests such as ground tiger, grub, root maggot, Liriomyza huidobrensis and thrips to onion seedlings.

3. It can promote the development of onion root system, shorten the time of slow seedling, realize early emergence and strong seedling, and improve the resistance to adverse environment.

4. it is beneficial to the increase of onion production, less money and good effect.

Second, what are the key points of onion transplanting techniques?

1. Soil preparation and fertilization before transplanting.

After smashing the previous crop, first plough the ground deeply, with a depth of 20 centimeters. When spinning the ground, it should be low-grade and high-speed, and the thinner the better. Then fertilize, use 150 jin of high-potassium potassium sulfate compound fertilizer, spread evenly to the surface, the land with serious soil salinization or consolidation had better use biological bacterial fertilizer 100 jin, spread together with compound fertilizer as base fertilizer. (note: 150 jin of compound fertilizer and 2 generations of underground insecticides can be sprinkled at one time if the all-in-one machine of fertilization and film laying is not used.)

2. Weeding and spreading the film to make eyes.

Plastic film should be covered 4-5 days before planting. Such as the use of fertilization and film drilling all-in-one machine, 3 yuan per mu with 300 ml of compound herbicide, water consumption of 60-90 jin. In order to ensure the efficacy of herbicides, the surface needs humidity when laying film, and it is best to cover the film in time while it rains. If the surface is dry, spray guns should be used to make soil moisture. If you do not use onion film-laying all-in-one machine, the operation steps are as follows: (1) first ridge and back, the ridge width is 1.2 meters. 2. Watering in the ridge. 3. Hit the herbicide in time after the water seeps. 4. Laying film. 5 hit the eye.)

3. Transplanting of seedlings

It can be transplanted after November 5, and the seedlings with developed root system, strong growth and uniform size should be selected, and the seedlings with excessive growth, dwarfing, diseased and branched seedlings should be eliminated. And according to the seedling height and thickness classification, strong seedling standard: the plant is healthy, there are no diseases and insect pests, the plant grows to 4 leaves, the height is about 20 cm, the thickness is 0.8 cm, the seedling age is 50 ~ 60 days, pick the big seedling and transplant first. After classification, seedlings of the same size can be planted together in order to carry out classified management and promote consistent growth in the field. (onion seedlings are generally divided into three grades: first-class seedlings are more than 15 cm high and 0.8 cm thick; secondary seedlings are about 12 cm high and 0.7 cm thick; and third-grade seedlings are about 10 cm high and 0.6 cm thick.)

4. Water and fertilizer management after transplanting.

After transplanting, it should be watered in time to take root as soon as possible. The slow seedling stage is about 20 days after onion planting, and the principle of water management is that the watering times should be more and the watering quantity should be less, so that it is suitable to keep the soil moist. Onion is easy to be infected with downy mildew, purple spot and blight. According to the weather conditions in winter, combined with pest control, foliar fertilizers such as potassium dihydrogen phosphate or humic acid were sprayed to ensure the safety of onions in winter.