(1) Choosing good seeds: Asparagus is generally propagated with seeds, so it is very important to select seeds. Asparagus seeds can be stored for 3-5 years under good storage conditions, and the actual effective period is 2-3 years in production. If there is no sealed package and it is kept in a humid environment, the germination rate of the seed will be quickly lost. To make the seeds fully mature and harvested, it usually takes more than 80 days from pollination to harvesting. The seeds collected in the year can also be treated with low temperature of 0-5°C to break the dormancy and increase the germination rate.
(2) Construction of Nursery: There are the following types of nursery suitable for northern areas. 1 Yangshuo: Yangshuo introduced here is a modified wind barrier. When building impotence, it is necessary to construct a concrete wall, wind the barrier, and then cover the membrane. The film can also cover grasshoppers, cover the night, and cover the membrane one week before sowing to increase the temperature. 2 Small arch sheds: Small arch sheds are small, simple plastic sheds that are made of bamboo or wood sticks and covered with plastic film. The scaffolding for the sheds should be tenacious, one every 50 to 60 centimeters long, with two insets, and then the ropes should be used to tie the brackets in series. Cover with a film around the dirt around the film to prevent the wind from scraping the film. Above the shed can also be covered with grass rakes to increase the temperature.
(3) Preparation of culture soil: Preparation of culture soil is the basis for cultivating asparagus strong seedlings. Nutrient soil must have good physical and chemical properties. The preparation methods are as follows: Fertile soil (screening) 6 parts, organic fertilizer (fertilizer, cow horse dung etc.) 4) Add dry chicken manure or dry manure 15-25 kg, compound fertilizer 1-1.5 kg/m3, mix and spread in Yangshuo or arch shed, thickness 14cm, flatten the surface, prepare for sowing.
(4) Making nutrient cartridges or nutrient bags: The nutrient cartridges or nutrient bags are cylindrical soil columns that are 10-12 cm high, 8-10 cm in diameter, or earth bags. There is a 1 cm square seed hole in the upper center of the gill. Nutritious clams are generally processed using a bowl maker. The nutrient soil used should be carefully prepared, the method is: glutinous beef cattle manure: fertilizer soil = 3:7, mixed sieving, add water to regulate humidity, wet and dry standards to hand into a group, landing is the degree of dispersion. The nutritional bags are made of waste newspapers and made of cylindrical paper tubes of the same size as the nutritional bowls. The bowls are filled with prepared nutritious soil.
(5) Seed treatment method: Asparagus seed coat is thick and hard, it takes a long time to suck enough water, so the seed must be treated before seeding to improve the seed germination rate and germination potential. Seed treatment methods are generally the following: 1 sun exposure 2-3 days (on the shed cloth 2-3 cm, turn 2-3 times a day, even the sun 2 to 3 days) 2 rinse to go to the miscellaneous, to go to Insect species. Pre-winter sand trap to insert. Choose Gaozao before winter, dig deep pits around 50cm in sunny area, and then deposit a layer of seeds in a layer of sand. The sand should have a certain humidity. The depth of seed burial should not be less than 20cm. After spring, the seeds are picked out and the seeds are screened out. You can insert the seed, because the seeds suck enough water, so the seedlings soon. Soaking in warm water. Without sowing seed, soak seeds in 45-50°C warm water before sowing. After the water temperature drops to room temperature, soak for 2-3 days, change water 2-3 times a day, and then remove the seeds and put them in the box.
(6) Germination: Immerse the seeds after soaking in a clean gauze, germinate at 25-30°C, rinse with warm water 1-2 times a day, wash the secretions on the seeds, and prevent the stuffy rot. When 10%-15% of seeds are broken and exposed, they can be sowed. If it is not possible to sow immediately, the seeds should be kept in a cool and ventilated place to prevent the shoots from growing too long and touching them when planting.
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