The leeks, also known as nursery herbs, ground rice dishes, and water chestnuts, have been collected as edible wild herbs since ancient times and have been cultivated for more than a century. With young leaves as edible organs, its delicious taste is delicious and nutritious. It also has the effect of clearing away heat and eyesight, etc. The frying, cold-cooking, filling, and porridge are top grade products. I. Characteristics: Amaranth is a cruciferous biennial plant with a plant height of 20-40 cm. The roots are leafy, pale green, and dark in color at low temperatures. Foliose tomentose, inscribed. Racemes, terminal or axillary, open white flowers. Short corners, inverted triangles. The seed is very small. Flowering from April to June, seeds mature from May to July. Leeks are cold-tolerant, seed germinating temperature is 20-25°C, and plant growth temperature is suitable for 12-20°C. Resistant to -5°C to -7°C. After vernalization in 10-20 days at 2-5°C, it can twitch and bloom. The soil is not strict, but loose fertile clay loam should be selected in cultivation. Second, the main varieties 1, board leaves chives. The leaves are large and thick, 10 cm long and 2.5 cm wide, with shallow cracks. Adult plants are about 18 leaves. Strong resistance, high yield, good quality, but weak winter, easy to twitch, suitable for summer and autumn cultivation. 2, leaflets leeks. The leaves are narrow, 8 cm long and 2 cm wide. The cracks are deeply engraved and pinnately cracked. There are 20 leaves around the plant. Slow growth, low yield, but strong winter, late bolting, suitable for spring planting. Third, the cultivation techniques 1, a mouthwash arrangement. Cultivation of leeks in Jiangsu Province can be planted in spring, summer and autumn. Spring sowing is planted from late February to late April, harvested from early April to mid-June, planted from July to October in summer and autumn, and harvested from mid-September to March of the following year. The highest output was sown in August. When the winter and spring temperatures are low, plastic sheds can be used to increase production, and they can be listed in advance or postponed. 2, the election site preparation. Choose fertile land, little weeds, convenient irrigation and drainage plots, additional basal fertilizer, and soil preparation. Plowing should not be too deep, the surface must be flat, and the soil should be fine to prevent the seeds from leaking into the depths and affecting the seedlings. Deep ditch sorghum to facilitate drainage and drop. 3, sowing. Isaac was the main broadcaster. The spring planting rate is 0.75-1 kg per mu, 1.5-2 kg in summer and 1-1.5 kg in autumn. After sowing, gently step on the surface of the plant to make the seeds and soil in close contact with each other. When the spring and autumn temperatures are low, they must be covered with plastic film after sowing. In summer, high-temperature and heavy rain seasons cover the shade nets to facilitate neat and neat crops. Immediately remove the cover after emergence. 4, field management. (1) fertilizer and water management. Seedlings of 2 true leaves, 7-10 days before the first harvest, and 1 fertilizer after each harvest. Each application of 0.3% urea 1000 kg per acre. Moisture management, pouring and pouring, keep the surface moist. Watering time is appropriate for morning and evening. (2) Weeding. Combine harvesting to remove field weeds in a timely manner. (3) Pest control. The leek pests and diseases are dominated by downy mildew and aphids. By means of measures such as clearing the gully, draining sewers, timely weeding, and improving ventilation and light transmission, pests and diseases can be controlled. Can use chlorothalonil, Kelu spray to control downy mildew, with imidacloprid control aphids. 5, harvest, leave seed. Plants around 13 true leaves for the appropriate harvest, mining large and small, pull between fractions. Spring sowing harvesting 1-2 times, the output per acre of about 1000 kg; summer and autumn sowing can be harvested 4-5 times, per mu output 2500-3000 kg. Remaining fields need to be established separately. Choose fields with high dryness, good drainage, and moderate fertility. Seed sowing from late September to early October. About 1 kg per acre. In mid-February, the strain was selected 1 time, and the weak strains and the miscellaneous strains were removed. The strains were retained at a spacing of about 12 cm and topdressing once. In late March, convulsions were made. In early May, the seedlings were grown from green to yellow and harvested at eight. Harvesting should be carried out before 10:00 a.m. on sunny days. After drying in the ground for 1 hour, the seeds should be shed on the film or sheets, dried and dried. Avoid exposure. Each acre can receive about 50 kilograms of seeds.
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