Introduction to coriander Coriander, also known as coriander, is a kind of seasoning dish that is often seen at ordinary times, and is deeply loved by many people, not only because of its unique fragrance, but also because of its many health functions.
Beijing coriander: a peasant variety in Beijing, with a plant height of about 30 cm, small leaves, odd pinnate compound leaves, green, toothed leaves and dark green or purple halo when exposed to low temperature. Petiole is slender, light green, and the base of petiole is nearly white. The leaves are smooth, thin, tender, fragrant and cold-resistant, and can be harvested 45-50 days after sowing.
Laiyang Coriander: a peasant variety in Laiyang, Shandong Province, with strong growth potential, lush leaves, tender tissue, small green leaves, odd pinnate compound leaves, plant height of more than 30 cm, and strong fragrance. It can be harvested 45-50 days after sowing.
Shandong large-leaf coriander: a farm variety in Weifang and Yantai, Shandong Province, with a plant height of 40-50 cm, erect plants, large leaves, dark green, slightly thick leaves, petiole length of 12- 13 cm, light purple, tender plants, strong fragrance, less fiber and strong cold resistance, but slightly poor heat resistance.
When to plant coriander in spring, and when to plant coriander? Coriander cultivated in the open field in spring is usually sown from late March to early April. Before sowing, rub the seeds in half with brick or cloth soles and separate the double hanging fruits. Coriander fruit is hard, not easy to seep and germinate slowly. It can be soaked and germinated before sowing or dried in the sun. When soaking seeds to accelerate germination, soak the seeds in warm water at 30℃ for 24 hours, take them out to dry for a while, and then put them at 20-25℃ to accelerate germination, and they can germinate in about 10 day.
When do you plant coriander in summer? It is recommended to plant in mid-June. Before sowing, water the bottom, mix the seeds with appropriate fine soil and sow. After sowing, cover the soil with a thickness of 2-3cm, stamp it with your feet, and water it 1 time to keep the soil moist. If the soil is hardened, water should be sprayed in time to loosen the soil, so as to facilitate and promote the emergence of seedlings.
When do you plant coriander in autumn? Sowing and multicasting in late July and mid-August. First, level the border, hug it with a flat rake after sowing, stamp your feet after mixing the seeds with the soil, and then pour enough water. The height of seedlings after emergence is 3 cm. Water 5-6 times at a time, apply 1 double fertilizer every three times, and apply urea 10- 15 kg per mu.
When do you plant coriander in winter? June 5438+10 can be planted in greenhouse, and the film should be buckled in time to raise the temperature before and after sowing. In winter, the plastic film should be tied tightly to raise the temperature and promote the emergence of seedlings. 11In late October, the tuyere shall be sealed and insulated. If the humidity in the shed is too high, the top seam should be opened for a short time at noon.
Planting method and steps of coriander 1 Site selection: Coriander is a shallow-rooted vegetable with strong taproot, strong fertilizer absorption ability and short growth period. It should be planted in loam plots with good drainage, loose fertility, water and fertilizer conservation and high soil organic matter content. Combined with soil preparation, 2000-3000 kg of decomposed farmyard manure and 20-25 kg of 45% ternary compound fertilizer are evenly spread as base fertilizers.
2. Seed treatment: Before sowing, the seeds need to be opened. Put the coriander seeds on the flat ground, rub them slowly and evenly with soles or other flat objects, break the shells of the coriander seeds, then stir them in hot water at 50-55℃, scald the seeds for 20 minutes, and continue to soak them for 18-20 hours when the water temperature drops to about 30℃, and sow them after the seeds fully absorb water.
3. Sowing: In open field cultivation, mechanical drilling or artificial sowing can be used. Mechanical drilling, row spacing 10- 15cm, ditching depth of 5 cm; When sowing, the depth of ditching is 4cm. Before sowing, pour bottom water, mix the seeds with appropriate amount of fine soil, and then sow. After sowing, cover the soil 2-3cm thick, cover the feet, water it 1 time, keep the soil moist, and the seed amount is 5-6kg.
4. Intertillage and weeding: when the seedlings are covered with soil, carry out intertillage and weeding for 1 time, slightly break the soil loose with a portable hand hoe or a small rake, and pull out weeds at the same time, so as to facilitate the emergence and healthy growth of seedlings; When the seedling height is 2-3cm, the second intertillage weeding is carried out, and the soil is appropriately subsoiled with a spatula or hoe to remove weeds; When the seedling height is 5-7cm, the third intertillage weeding is carried out.
5. Fertilizer and water management: Coriander is not drought-tolerant, and the soil should be kept moist. Generally, it should be lightly watered every 5-7 days 1 time, and watered 5-7 times during the whole growth period. At seedling stage, quick-acting fertilizer is applied with water; Topdressing urea15 kg in the middle growth stage; ; In the late growth stage, 0.3% urea aqueous solution can be sprayed on the leaves, and potassium dihydrogen phosphate can be properly added to the solution to facilitate the robust growth of plants.