The planting methods of wild coriander mainly include the following aspects: 1. Soil preparation
Soil selection: Coriander does not have strict requirements for soil conditions, but it is suitable to use loam soil with good drainage, fertile and loose soil, and rich in organic matter. Soil with good soil structure, strong nutrient and water retention properties, and high organic matter content is beneficial for the growth of coriander.
Soil preparation and fertilization: Before sowing, it is necessary to deeply plow the soil and apply sufficient base fertilizer. Generally, 2000-3000 kilograms of decomposed organic fertilizer and 20-30 kilograms of nitrogen phosphorus potassium ternary compound fertilizer can be applied per acre of land. After fertilization, turn the rake 2-3 times and finely prepare the soil to make a bed. The width of the bed is generally 1-5 meters, the width of the ditch is 30 centimeters, and the depth of the ditch is 20 centimeters. 2、 Sowing seeds
Sowing time: Coriander prefers cold and cool environments, suitable for sowing in spring and autumn. The optimal sowing period for large-scale cultivation is from early August to mid September. When sowing in spring, it is necessary to do so in protected areas such as greenhouses, and the sowing period can be chosen in mid April.
Seed treatment: In order to improve seedling emergence rate, seeds need to be treated before sowing. You can rub the seeds open to separate the two seeds inside the fruit, and then soak them in cold water for 12-15 hours. If conditions permit, gibberellin treatment can also be used to break seed dormancy and increase germination rate.
Sowing method: Coriander can be sown by sowing or strip sowing. When sowing, first water the surface of the bed, and after the water seeps, sprinkle about 1 centimeter thick sieved fine soil. Then mix the germination seeds with 2-3 times the amount of sand and evenly sprinkle them on the bed. Cover the bed with about 1 centimeter thick fine soil after sowing. When sowing in strips, make a trench about 2 centimeters deep on the surface of the bed, with a row spacing of 8 centimeters. After sowing, cover the soil and press down with water. 3、 Field management
Water management: Coriander prefers moisture, but should not be watered too much during the seedling stage. When the seedlings grow to 10 centimeters, the plants enter the vigorous growth period and should be watered frequently to keep the soil surface moist. During the high temperature season, it is important to avoid soil that is too dry. When water is scarce, spray in the morning and evening to keep the leaves fresh and tender.
Fertilization management: During the growth period of coriander, it is necessary to apply topdressing according to the growth condition of the plant. When the seedling height is generally 3-4 centimeters, quick acting nitrogen fertilizer can be applied with water; When the seedling height is 10 centimeters, water it and apply fertilizer 1-2 times. 30 days before harvest, a mixture of 0.3% potassium dihydrogen phosphate and 0.2-0.5% urea can be sprayed to improve quality.
Tillage and weed control: During the growth period of coriander, tillage and weed control are necessary. Mid cultivation can loosen the soil and promote root development; Weeding can prevent weeds from competing with coriander for nutrients and water. When weeding, it is best to remove it to avoid using herbicides that can cause damage to coriander. 4、 Disease and pest control
Disease prevention and control: The main diseases of coriander include leaf blight, viral diseases, etc. When preventing and controlling diseases, comprehensive agricultural control should be the main approach, supplemented by chemical control. In the early stage of the disease, agents such as mancozeb, thiophanate methyl and carbendazim can be used for spray prevention and control.
Pest control: The main pest of coriander is aphids. When controlling aphids, a combination of physical and chemical control methods can be used. Physical prevention and control measures include hanging silver ash film, setting up insect nets, and using yellow boards to lure and kill; For chemical control, agents such as virus K, phytoalexin and abamectin can be selected for spray control. 5、 Harvesting
Harvesting time: The harvesting time of coriander varies depending on the sowing time and region. The general growth period is 60-70 days. 10 days before harvesting, gibberellin can be sprayed to increase yield. When harvesting, tender stems and leaves should be the main focus to avoid harvesting too late and causing a decrease in quality.
The planting method of wild coriander requires attention to soil preparation, sowing, field management, pest control, and harvesting. Only by doing these tasks well can we obtain high-yield and high-quality coriander.