Method for cultivating asparaguses in North China

[0019] The present invention will be further described below in conjunction with the embodiments. The following embodiments are only used to illustrate the present invention and do not limit the present invention.

[0020] An asparagus cultivation method in North China,

[0021] (1) Soil conditions: The soil conditions required for asparagus production are flat terrain, deep soil layer, loam or sandy loam, rich in organic matter, good air permeability, strong water and fertilizer retention; low groundwater level, convenient drainage and irrigation; pH value Neutral slightly acid; soil fertility standards are organic matter ≥ 2%, alkali hydrolyzed nitrogen ≥ 140 mg/kg, available phosphorus ≥ 40 mg/kg, and available potassium ≥ 130 mg/kg;

[0022] (2) Seed selection: Choose a first-generation seed that exhibits early germination, fast growth, uniform thickness of tender stems, close scales on the head, and good commercial properties;

[0023] (3) Nursery: Rinse the seeds with clean water before nursery to remove unscathed seeds and moth-eaten seeds, then soak them in 50% chlorothalonil 300 times solution for 11h, and then soak the seeds in warm water at 26℃~29℃ for 3.5 days, and drain them. Mix with a small amount of dry sand or fine soil, keep it at 20~25℃ for moisturizing and accelerating germination, rinse with clean water 1~2 times a day, sowing when 30% of the seeds are white;

[0024] (4) Sowing: Open small furrows at 14cm row spacing on the leveled seedling bed, with a depth of about 3cm, and then sow seeds every 10cm in the small furrows. After sowing, cover the seeds with fine soil, and cover the seeds tightly after sowing. Increase the temperature and protect the moisture to promote the whole seedlings. When about 50% of the seedlings are unearthed, the mulch must be removed in time to avoid high temperature burning. At 18°C ​​at night, the seedlings can be planted at about 60 days old;

[0025] (5) Planting: Before planting, fully plow and level the land, apply enough base fertilizer to increase fertility, draw a straight line in the north-south direction at a row spacing of 1.3-1.4 m, and then dig the width 45 cm and 40-50 m deep along the straight line Use 4000-4500kg farmyard fertilizer, 160-190kg compound fertilizer, 50kg calcium phosphate, 18kg potassium sulphate, 2kg phoxim granules per acre, and mix well. Do not fill the planting ditch. It can be lower than the original ground. ~7 cm, fill the ditch after planting, and irrigate the planting ditch. The ridge surface between the two ditches should be made into small arches with high middle and low sides. Later, as the seedlings grow, the soil on the ridge surface is gradually Backfill into the planting ditch to form a soil ridge about 10 cm above the original horizon to facilitate drainage and waterlogging prevention during rainy periods; the fixed time is from July 10th to August 10th, 1600 plants per mu, planting distance 20cm, custom-made After that, water in time to make the soil solidify in time, and when the water seeps down, loosen the soil in time to protect moisture;

[0026] (6) Post-planting management: combined with cultivating, cultivating soil at the roots of the plants can promote the development of underground scales and enhance disease resistance; topdressing starts about 30 days after seedlings are planted, and then topdressing once every 30 days. The growth of the plant and the amount of fertilization gradually increase. The topdressing in the juvenile period is generally applied with decomposed human feces or cake fertilizer. The fertilization is generally 16-19cm away from the plant and applied in a furrow with a depth of 10cm along the ridge. Sprinkle manure on the border surface to prevent cold, and cultivate it next to the plant in early spring next year. After the stems and leaves are dry in winter, cut the dead stems on the ground and burn them; build a plastic shed in time, cut off all mother stems in time at the end of October, loosen the soil and fertilize, and clean the garden , Start to build a plastic shed, the height and width of the shed are 1.8m and 4.5m, and the structure of the shed can be made of bamboo or steel pipe;

[0027] (7) Pest control: Asparagus seedlings are vulnerable to root rot, blight, brown spot, stem blight, grubs, mole crickets, cutworms, beet armyworms and weeds, which affect the growth and development of seedlings. Do a good job of prevention and control. During the seedling growth period, spray carbendazim and thiophanate methyl every 10 days to prevent; control grubs, mole crickets, cutworm underground pests, use sauteed crushed bean cake or wheat bran 75 kg/ hm 2 Add chopped green cabbage leaves 75kg/hm 2 With trichlorfon 3kg/hm 2 Mix evenly to make a poison bait, and evenly sprinkle it into the base of the seedlings in the evening to trap and kill, and also use 3% phoxim granules 2-5kg per acre to treat the soil.