Asparagus, also known as asparagus and asparagus, is a perennial herb. It is listed as one of the top ten famous dishes in the world for its rich nutritional value.

1. Cultivation measures

1. Seedling cultivation

In our area, it is advisable to raise seedlings in spring, usually in early or mid-April, and apply sufficient base fertilizer to the seedbed. Asparagus seeds have a textured leather, poor water permeability, and slow water absorption. Soak them in water at 25 to 30°C for 2 to 3 days before sowing. After germination, spray 800 times the new high-fat film solution for sowing. After sowing, cover with fine soil and cover with grass to retain moisture. Seedlings begin to emerge in 10 to 15 days, and the seedlings need to be planted at 0.5 to 1 kg/667 square meters. The grown seedlings can be planted in 0.6 to 1 hectare of fields.

2. Site selection

Asparagus is a perennial root crop, usually sandy loam or loam soil with fertile soil, good ventilation, deep soil layer, good drainage, water and fertilizer retention. It is most suitable to avoid heavy clay soil with poor air permeability, shallow cultivation layer, hard subsoil, strongly acidic or alkaline soil and land with lots of gravel. It is also not suitable to plant asparagus in plots with tomatoes, sugar beets and alfalfa.

3. Planting

It is advisable to plant in spring. The row spacing for green asparagus planting is 135 to 150 cm. For white asparagus, the row spacing is expanded to 180 cm for easy access to soil. The spacing between plants is 30 cm. The width of the planting trench is 40 cm and the depth of the trench is 25 to 30 cm. Base fertilizer and compound fertilizer are spread in the trench. , 667 square meters, apply 3000 to 4000 kilograms of soil and fertilizer, 30 kilograms of compound fertilizer, and 4 centimeters of soil. After the seedlings are dug up, the roots should be sprayed with 800 times the new high-lipid film solution, and then the seedlings should be planted into the ditch according to the distance between the plants, covered with 3 to 5 cm of soil, watered thoroughly, and covered with soil for the second time after a week to slow down the seedlings.

4. Field management

Asparagus has a long growth life. In the first to second years, it should be cultivated, weeded, fertilized and watered frequently to cultivate strong plants so that they can enter the peak production period as soon as possible.

① Fertilization Asparagus requires the most nitrogen fertilizer, followed by potassium, phosphorus, and calcium fertilizers. Apply 1500-2000 kg/667 square meters of high-quality farmyard manure again in autumn or early spring; when the tender stems are 4-5 cm high, provide sufficient water and nutrients, top-up with 7-10 kg/667 square meters of germination fertilizer urea, and then spray Apply ground fruit to strengthen the stems; topdress 2 to 3 times during the harvest period, first heavy and then light, increase phosphorus and potassium fertilizers, and combine with irrigation; after harvesting bamboo shoots, apply 1,000 kilograms of organic fertilizer and 15 kilograms of urea per 667 square meters for rejuvenation; Apply human excrement in August; the last top dressing should be completed 2 months before frost to prevent new shoots from appearing in autumn.

②Irrigation Timely irrigation can improve the yield and quality of asparagus. Keep the soil water holding capacity at 60% to 70% during the asparagus harvesting period. Irrigation once every 10 to 15 days during drought, and sufficient freezing water before overwintering.

③Pests and diseases control: Diseases include stem blight, brown spot, rust, root rot, etc. The main pests include Spodoptera litura, cutworms, wireworms, aphids, spider mites, etc. Prevention and control methods: In winter, strengthen garden clearing, prevent waterlogging, and prevent overcrowding of plants; for chemical control, spray 1:1:300 Bordeaux mixture, thiophanate-methyl, carbendazim, sodium dimethoate, agricultural antibiotics, etc., 7 to 10 Once a day, 2 to 3 times in a row; pest control is mainly to trap and kill adult insects, and you can choose trichlorfon, chlorothalonil, deltamethrin, aphrodisiac, cyclofenac, etc., and use new high-lipid film agents as powerful Auxiliary control.

5. Harvesting

Asparagus is generally harvested in the 3rd to 4th year after planting, and the harvesting period is 60 to 80 days. The young stems of green asparagus can be harvested at about 25 centimeters, and the young stems of white asparagus can be harvested at about 18 centimeters. Harvest once every morning, once in the morning and once in the evening when the temperature is high.