When coriander is planted in summer, the sowing date is not strict. Generally, it is sown from May to June and harvested 40-50 days after sowing. Summer sowing coriander is highly effective, but it is difficult to cultivate. Because coriander is a kind of vegetable that likes cold weather. Above 30 ℃, it will stop growing, so pay attention to these points when planting:

1 Select the superior species. Choose varieties that are resistant to drought, grow fast, and are not easy to mash, such as Beijing coriander, American large leaf coriander, and Thai heat-resistant large-grain coriander.

2 Seed treatment. In summer, the temperature is high, and the water in the soil evaporates quickly. In order to emerge early and the whole seedlings, the seeds must be treated before sowing, that is, the peel is first crushed, and then the seeds are soaked to promote germination. The seeds can be soaked in cold water for 4-5 hours. The seeds are packed in cotton bags and placed in a dark and humid environment at a temperature of about 15 ° C for 7 days (such as in a cellar or a crock). When the seeds are exposed, they are sown.

3 Fertilize the site. Choose soil with fertile soil, water and fertilizer, convenient drainage and irrigation, and well-ventilated soil. It is best to have no parsley plots within 3 years. Apply 3,000 kilograms of farm manure per acre and 30 kilograms of high-nitrogen ternary compound fertilizer per mu. Spread the fertilizer evenly, rotate the land, and make a flat ridge growing 5-6 meters to be sown.

4 Fine seeding. Sowing method is often used in production, and water is poured into the pan before sowing. After the water infiltrates, mix the seeds with sand, spread them evenly, and cover with 1-2 cm thick fine sand. After everything is done, suppress it with a hoe. Covered with old grasshoppers, straw and other coverings, it can play a role in keeping the temperature down. Generally, seedlings can be released about 7 days after sowing, and the cover is removed when most of the seedlings are unearthed.

5 Field management. Coriander is afraid of high temperature and strong light. Where conditions permit, you can consider covering shading nets on the cultivated loquat to reduce the temperature and shade, which is beneficial to the growth of cilantro, increase yield, improve quality, and increase planting benefits. Fields without closed herbicides were combined with paddy plots at the seedling stage to remove field weeds in time to prevent competition with cilantro for fertilizer and water. The principle of fertilizer and water management in coriander growing season is not to dry and not to irrigate, less watering at seedling stage, and to maintain sufficient water and fertilizer supply during the growing season. Topdressing depends on the strength of the soil. Combined with watering, topdressing urea or nitrogen and potassium fertilizer is the main method. Generally, 15kg of fertilizer is applied each time and topdressing is performed twice.

6 Control pests. The main pest of coriander over the summer is aphid, which is very common under high temperature and drought conditions. Generally, the juice of coriander leaves is sucked, which results in reduced yield. 10% imidacloprid 800 times liquid spray can be used for prevention and control, spraying once every 7 days and spraying 2-3 times continuously.

Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone