Detailed Explanation of Black Swallow-wort Planting Techniques and Cultivation Management Methods
Black Swallow-wort, also known as Laojunxu and Zhiweilao, is an erect perennial herbaceous plant. Its rhizome can be used as medicine and has the effects of eliminating restlessness due to deficiency, clearing heat and reducing swelling, promoting tissue regeneration and relieving pain, and its medicinal value is extremely high. At present, market resources are scarce, and planting it can bring considerable economic benefits, so how should Black Swallow-wort be planted? Let's take a look together.
1. Land selection and land preparation
Black Swallow-wort prefers a warm and humid climate, is cold-tolerant, and has low requirements for soil, but if high yield is desired, it is best to use sandy loam with good drainage, loose fertility, and rich humus. In the winter of the previous year, deep plow 20-30 cm to allow the soil to fully differentiate and mature, then plow again 15-20 days before sowing, and apply base fertilizer according to the soil fertility condition. After shaping and raking level, make high beds, requiring a bed width of 2 films, a bed ditch width of 30 cm, and a bed height of 20 cm. The seedbed should be carefully plowed and harrowed.
2. Propagation methods
Black Swallow-wort is generally propagated by seeds, which can be divided into direct sowing and seedling transplanting, generally using about 3-5 jin of seed per mu. Direct sowing is generally carried out around Qingming, using the drill sowing method, opening furrows on the bed surface at a row spacing of 25-30 cm, with a furrow depth of 3-4 cm being suitable. Evenly scatter the seeds into the furrows, then cover with soil and water. If the temperature is suitable, seedlings can emerge in about half a month. Seedling transplanting is the same as direct sowing, sowing in spring, also opening furrows on the bed surface, but with a row spacing of 5-10 cm. Evenly sow the seeds into the furrows, cover with soil and water, and when the seedlings grow to 10 cm, transplant them to the field.
3. Field management
Whether direct sowing or seedling transplanting is used, after emergence it is inevitable that crowding of seedlings will occur. In order to ensure uniform seedling growth, thinning should be done in time. After transplanting and survival, loosen the soil and remove weeds in time to prevent weeds from seizing nutrients and growth space and affecting seedling growth. When loosening the soil, be careful not to go too deep, so as not to damage the seedling root system. Water in time during drought, but take good drainage measures during the rainy season to prevent root rot. Apply topdressing 1-2 times from June to August to promote plant growth. After the plant blooms, if seeds are not needed, the flower stems can be cut off to concentrate nutrients in the roots and increase yield.
4. Pests and diseases
Black Swallow-wort is originally a wild plant with strong vitality and high resistance to environmental stress, so pests and diseases rarely occur during planting, but root rot is likely to occur in high-temperature and rainy seasons, so drainage should be done in time during the rainy season. In summer, attention should be paid to aphids. When aphids cause damage, dimethoate emulsifiable concentrate can be sprayed for control, with good results.
The above is an introduction to the planting techniques of Black Swallow-wort. I hope it can help you. If you want to learn more related knowledge, please stay tuned to us.