First, select good varieties of high-yield, high-quality, good taste of cress varieties, such as early white celery, late-maturing iron stalk green. Second, the key cultivation measures 1. Selecting a site with independent irrigation and drainage system, clean water, and no “three wastes†emissions within a 3 km radius. 2. The germination morning celery was in the middle and late August, and the evening celery was in mid-September. The mature stalks with 0.8–1.0 cm thick stems, uniform top and bottom thickness, dense internodes, and abundant axillary buds were selected as the seedlings. Plant the plants into small bundles with a diameter of 20 cm and stack them in ventilated places. The height should be 1-1.5 m. All kinds of piles were covered with straw and moisturized around them, and covered with night peels. Each day at 8 a.m. and 4-5 p.m., the seeds were soaked with cold water once. After 7-10 days of piling, seedling buds sprouted and emerged. Short roots can be seeded. 3. Site preparation and preparation at the same time. After the deep plowing, per acre, apply 4,000 tons of manure, 30-50 kg of high-concentration compound fertilizer, and 50 kg of superphosphate. In order to prevent the acidity of the soil solution, 75-100 kg of lime can be produced per mu. At the same time, calcium fertilizer was added to improve the disease resistance of the plants. Three days before seeding, Daejeon will be flattened. Fields ditch around to facilitate drainage. At the same time, 15% of the finely stabilized EC was used to control field weeds. 4. Rows are planted in the afternoon. Around the field, along the ditch, the seedlings are perpendicular to the ditch, the base is out of the field, and the tip is heading toward the field. Plant spacing 3 to 4 cm, neatly arranged in a circle. The rest of the field is sprinkling. Generally, the amount of planting per acre is 800-1000 kg. 5. About one month after planting and seeding, the seedlings have grown into individual individuals. At this time, the old stems of the plants have decayed and the seedlings can be planted in the soil. 6. Field Management (1) Water Management. After the watercress is planted in the field, keep the thin water layer and drain the seeds for 8-10 days. Drain the fields for 1-2 days. After taking root, gradually deepen the water layer to 3-4 cm, and promote it to grow. Throughout the long-term, the water layer is generally maintained at 8-10 cm. During the wintering period, the water layer should be raised to 15-20 cm in order to prevent freezing. (2) Fertilizer management. Mainly with base fertilizer, suitable top dressing. The first time the topdressing is 15 days after the seeding, 5 kg of urea is applied per mu; the second top dressing is about 15 days after the top dressing, and 15 kg of high-concentration compound fertilizer is applied per mu; the top dressing may be used as the third time. And set. 7. Disease prevention and pest control The main pests of watercress are aphids. The main diseases are spot blotch and rust. Safety precautions should be taken.
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