Parsley is a vegetable that prefers cold weather. When the temperature is higher than 20°C, the growth slows down. When it is higher than 30°C, it stops growing. Therefore, parsley should create suitable environmental conditions in the summer cultivation, pay attention to the following seven points. First, choose the best species Choose varieties that are drought-resistant, heat-resistant, fast-growing, and not easily convulsed, such as Beijing parsley, American leafy parsley, and Thai heat-resistant large-grained parsley. Second, seed processing In summer, the temperature is high, and the moisture in the soil evaporates quickly. In order to emerge early and produce a complete seedling, the seed must be treated before sowing, ie, the seed coat is first grinded and soaked to germinate. Seeds can be soaked in cold water for 4-5 hours. The seeds are placed in a cotton bag and germinated for a week at a temperature of 15°C in a dark, moist environment. When the seeds are white, they can be sowed. Three, soil fertigation Choose fertile land with fertile soil, water and fertilizer, drainage and irrigation facilities, and well ventilated land. It is best to not cultivate parsley plots within 3 years. Mushi farmyard fertilizer 3000 kilograms, high-nitrogen and low-phosphorus potassium compound fertilizer 50 kilograms, spread the fertilizer evenly, rotating the land, made flat to be broadcast. Fourth, fine sowing The sowing method is often used in production. Before sowing, sufficient water is poured into the bowl. After the water is permeated, the seeds are mixed with sand and spread uniformly, and then spread and covered with 1-2 cm thick fine sand. After all the broadcasts were finished, use a hoe to suppress it once. Covering old grasses, straws, and other coverings can help maintain warming and cooling. After about 7 days of general sowing, it is possible to produce seedlings, which will be removed when most of the seedlings are unearthed. V. Field Management Parsley is afraid of high temperature and strong light. Where conditions permit, it may be considered to cover shade nets on cultivated earthworms to achieve the effect of cooling and shading, which is beneficial to the growth of coriander, increase yield, improve quality, and increase planting efficiency. There was no field that closed the herbicide. In the seedling stage, it was combined with cultivating and cultivating. The field weeds were removed in time to prevent competition with the parsley and compete for water. The management principle of fertilizer and water in the growing period of coriander is not drought or watering. Watering at the seedling stage is sufficient to maintain sufficient water and fertilizer supply during the growth period. Top dressing depends on the strength of the land, combined with watering, topdressing urea or nitrogen and potassium fertilizers, generally 15 kg per fertilization, continuous top dressing twice. Six, control pests The main insect pest of the summer cilantro is maggots, which occurs extremely frequently under high temperature and drought conditions, and generally sap the leaves of the coriander leaves, resulting in reduced production. 10% of imidacloprid can be used to control 800 times spray, spraying once every 7 days, spraying 2-3 times. Seven, suitable for harvest The summer cilantro grows faster and should be harvested as soon as possible to achieve the harvesting standard, so that when the plant grows to a height of 20-25 cm, it can start harvesting. In order to improve its merchandise, harvest time is usually after 6:00 pm or early morning.
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