Asparagus is the root tuber of Asparagus in Liliaceae, which has the effects of nourishing yin, moistening dryness, clearing lung-heat and reducing fire. It is often used to treat symptoms such as cough due to dryness and heat, cough due to yin deficiency and fatigue, and is a common medicinal material in traditional Chinese medicine.

The planting techniques of asparagus mainly include the following aspects:

1, land selection and soil preparation: Asparagus usually grows on the edge of forest, grass or bushes in Shan Ye, and it is best to choose undergrowth cultivation or farmland cultivation for planting, and interplanting with tall crops such as corn. Before planting, it is necessary to dig 30 cm deep into the soil to remove weeds and residues, and apply 2500~3500 kg of decomposed manure per mu. After that, plastic harrow the land, make a high ridge and wait for planting.

2. Propagation methods: The propagation methods of asparagus mainly include seed propagation and ramet propagation. Seed can be sown in spring or autumn. After sowing, it should be covered with compost or plant ash, and covered with a layer of straw to keep warm and moist. After emergence, cover grass should be uncovered in time, and it can be transplanted after one year of cultivation. Breeding by dividing plants is to select mother plants with big roots and stout buds, divide them into several plants, each with more than three bud eyes, and then plant them.

3. Field management: During the growth of asparagus, it is necessary to regularly carry out field management such as weeding, fertilization and watering to ensure its healthy growth. At the same time, it is necessary to pay attention to the prevention and control of pests and diseases, such as red spiders, aphids, and root rot.

The growth environment of asparagus needs to meet the following specific conditions:

1, climatic conditions: Asparagus enjoys a warm and humid environment, and the most suitable growth temperature is15 ~ 28 degrees Celsius. It is not cold-tolerant, so it is necessary to ensure that the temperature is not lower than 5 degrees Celsius in winter, otherwise its growth will be affected. At the same time, asparagus is not resistant to high temperature, so it needs to be properly shielded when it is irradiated by strong light in summer.

2, lighting conditions: Asparagus is half cloudy, which has certain requirements for lighting, but it is not resistant to direct light. Therefore, when planting asparagus, it is necessary to choose a semi-shady and semi-sunny place, or take shading measures to prevent strong light from harming the plants.

3. Soil conditions: Asparagus has strict requirements on soil, and it likes to grow in loose, porous, breathable and fertile sandy loam. The pH value of soil should be slightly acidic to neutral, and it is necessary to keep the soil moist but not too wet to prevent root rot. Before planting, the soil should be turned over and fertilized to provide sufficient nutrients.