Although the shallots can be cultivated in all seasons, the yield is higher in spring and autumn. If the summer production of the shallots is to obtain better benefits, it is necessary to select the four varieties of variety selection, transplanting, field management and pest control.

1. Select the variety and transplanting period

Yiwu local scallions varieties were selected and planted in batches in May. Because of this time, the green onions were dried, and the other varieties of scallions stopped growing. This local variety can also grow, and there is no high temperature period from July to September. Yellow head, good commodity, obvious advantages in summer cultivation.

2, colonization and transplanting

Generally, the land that has not been planted with onion and garlic vegetables for 2 to 3 years is used. If the second year is continuous, the lime should be sterilized by spraying 100kg/667m2, and then transplanted after sun drying. Slightly sandy red soil is most suitable for cultivation of scallions. Generally, 9 to 10 holes are planted at 1.5 m wide, and 2 holes per hole, with a hole distance of 15 cm. The plant is better to be deeply planted, but not more than 5 cm, which can increase the length of the scallion and increase the yield and quality. Due to the heavy rain in the summer, the soil is easy to be knotted. If the planting is too deep, the bottom root system is poorly permeable, which will cause poor growth and even white rot. If it is planted shallowly, although it is early, the roots are green and the commodity is slightly poor.

The base fertilizer is preferably 3,000 kg per 667 m2 of simmered manure (pig manure, chicken manure, etc.), or 100 kg/667 m2 of imported superphosphate compound fertilizer. Because the imported compound fertilizer has long effect and strong stamina, the color and commercial quality of the chives produced with the domestic compound fertilizer as the base fertilizer are poor.

3, post-plant management

3.1 Moisture: Watering the plants on the day of planting, and pouring the seedling water once every 7 to 10 days. The root system of scallions is underdeveloped, the distribution is shallow, and the water absorption capacity of the roots is weak. Therefore, it is necessary to adhere to the small water and dip irrigation during drought, which is both drought-proof and stain-proof. After the survival, you can fill the horse water at 4 o'clock in the morning, so the temperature of the water and soil is the same, and the water in the ditch is basically sucked out after the sun comes out. If the water is poured at noon, the temperature difference between soil and water is large, not only easy to burn roots, but also easy to induce a variety of diseases.

3.2 Weeding: Two days after transplanting, spray 60g/667m2, or use 33% weeding emulsifiable concentrate 100~200ml/667m2 for water spray. When using herbicides, it should be noted that when the temperature is high or the soil moisture is high, the amount of herbicide is low, the temperature is low or the soil is dry, then the dosage can be appropriately increased. Generally, the temperature is over 30 °C, so it is not easy to use. Because the roots of the scallions are few, the weeding of the loose soil is easy to damage the roots, so the application of herbicides is more common.

3.3 Topdressing: If you choose to apply urea or manure in the rainy days, you should apply less than a few times. If the urea has just been applied, the drip irrigation facility should be turned on or watered with a kettle to avoid burning the plants.

4, pest control

The main pests of the shallot are the onion horse and the beet armyworm, and the control onion horse can be sprayed with 33% water to kill chlorine 500 times liquid or 20% good winter 1000 to 2000 times liquid. From July to August, it is best to control the young beet armyworm with 20% rice suspension suspending agent 1000 times in the evening. Because the beet armyworm is 3 to 4 years old, its food intake is greatly increased, and it will penetrate the onion tube and enter the onion tube to eat and leave the epidermis. It will cause a large area of ​​leaf hole overnight, plus the wax on the surface of the shallot. Powder, the liquid is not easy to stain, so the use of pesticides has little effect.

When using pesticides, an equal or half amount of anti-reaction liquid should be added, but the best method is to use black light to trap adult insects, the reduction rate can reach about 70%. The disease of scallions is gray mold and disease, and the commonly used agents are 800 times solution of anti-dry spirit and 600 times of sterilizable powder of 64%. The specific production is mainly based on prevention, and the application of quicklime when cultivating the land can effectively reduce the occurrence of pests and diseases.

5, harvest

The chives transplanted in May are harvested in August. At this time, the quality is good and the price is high. The output per 667m2 can reach 4000kg, and the output value is about 8,000 yuan.

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