First, the variety selection: summer and autumn anti-season cultivation of coriander, should choose the heat-resistant, disease-resistant, strong resistance, strong large leaf type coriander varieties.
2. Seed treatment: Coriander seeds are difficult to germinate under high temperature conditions. Before sowing, use 1% carbendazim WP 300 times to soak seeds for half an hour, then remove them and wash them with clean cold water for about 20 hours, then at 20- Seeding was carried out after germination at 25 °C.
3. Fertilization on the whole land: Select the land that is convenient for irrigation and drainage, and the soil is loose and fertile. The front crops are 20-25 cm deep after harvest and 15 days in the sun. In order to facilitate the use of the sunshade net, a deep groove sorghum having a width of 120 cm, a height of 20 cm, and a groove width of 30 cm is formed. Coriander has a short growth period, combined with land preparation, 3,500 kg of manure per mu and 150 kg of cake fertilizer, and 50 kg of calcium, magnesium and phosphate fertilizers. It is necessary to finely level the topsoil of the kneading surface to facilitate the emergence of seedlings.
Fourth, timely sowing: summer and autumn seasons cultivated coriander, generally planted from mid-May to early July, the amount of seed per acre is 1 kg, which can obtain higher yield and higher price. Cover the skin 1-2 cm after spreading evenly in the case of soil moisture. Cover the grass to protect the tide and promote the seedlings, and remove them after 5-7 days, during which the soil moisture is maintained.
V. Field management: The summer and autumn gas will gradually increase, which will affect the growth of coriander. Therefore, after the grasshopper is removed, the sunshade net is covered in time. The sunshade net should be covered by daylight and exposed at night to enhance ventilation and prevent the seedlings from becoming weak and causing disease. Because of the short growth period, coriander should be weeded early, morning seedlings, and early-seeking quick-acting nitrogen fertilizer. Generally, the seedlings should be carried out about 7 days after the seedlings, and the seedlings should be fixed when the two leaves are true. The seedlings are 2-3 cm away. Usually water is poured once every 8 days, when the seedling height is 3 cm, the topdressing is started, and 10-15 kg of urea and 250 g of boron fertilizer are applied per mu. Later, the carbon ammonia or urea should be applied 2-4 times in combination with the watering period. When the leaf fertilizer is applied later, an appropriate amount of potassium dihydrogen phosphate should be added to promote the growth of the leaves.
Pest control: The pest control of pollution-free coriander should be based on the principle of prevention and treatment, and a combination of various control methods to control pests and diseases to a minimum. 1. Agricultural control is based on varieties with strong disease resistance, and rotation is implemented to avoid continuous cropping. Timely removal of diseased leaves in the field to reduce the chance of infection. Strengthen fertilizer and water management to improve disease resistance of plants. 2, physical and biological control applications of frequency vibration insecticidal lamps, sexual attractants, Bt powder and other physical control technology. 3, chemical control diseases are mainly seedling stage collapse, adult stage viral disease, anthracnose and spot blotch. 5 days after emergence, spray once with 800 times of non-polluting fungicide 3% polyoxygenate, and then spray once every 7 days with 600 times of polyoxygen bromide, a total of 2-3 times to prevent smashing , anthracnose and spot blotch. To prevent and cure viral diseases, insect-repellent nets can be used to prevent the spread of aphids; use shading to avoid high temperature and drought environment, reduce the occurrence of aphids; and use 20% imidacloprid wettable powder 20 g plus 50 kg of foliar spray to thoroughly control aphids, Prevent the occurrence of viral diseases. Liriomyza sativae is sprayed with 1% avermectin 1500 times solution.
Seven, harvest: 40 days after sowing, you can harvest. 15 days before harvesting, spraying 20-25 mg / liter of gibberellin can make the leaves stretch, the branches increase, and the yield is high.
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