Polygonatum is a kind of Chinese herbal medicine with high efficacy. It takes three to four years from sowing to harvesting. Management is very important. If this link is not appropriate, it will lead to production cuts. Let's take a look at the technical points of planting management of Huang Jing.
Irrigation and weeding
In the seedling stage, the most important job is cultivating and weeding. In order to avoid weeds and seedlings competing for water and composting, weeding work should be started after the seedlings are unearthed. Generally, 3-4 times of weeding work is carried out every year to ensure no weeds in the field. At the same time, in order to promote the root growth of seedlings, cultivating is necessary, which can loosen the soil, become soil compaction, and hinder the growth of roots. Especially after the rain, the soil is easy to be knotted, and timely cultivating can avoid root hypoxia and suffocation. In the late seedling stage, in addition to cultivating, it is necessary to cultivate the soil to avoid the roots from being exposed and avoid plant lodging.
2. Reasonable topdressing
Generally, topdressing is combined with weeding and cultivating. The first fertilization is carried out after the first weeding, and then fertilized once every 1-2 months. Each time, 1000-1500kg of high-quality fertilizer for human and animal is applied. Every winter before the winter, the high-quality farmyard manure is 1200-1500kg, and 50kg of superphosphate and 50kg of cake fertilizer are mixed. After mixing evenly, the ditch is applied and then watered to accelerate the formation and growth of the roots. However, pay attention to the amount and concentration when fertilizing, so as not to burn the root system.
3. Timely irrigation
Huang Jing likes to grow a moist and concealed environment, and is afraid of drought. Therefore, it is necessary to pay attention to the work of fertilizer and water. Generally, watering should be done once a week after transplanting to keep the soil moist, and at the same time, shading should be done to prevent the glare from affecting plant growth. In the rainy season, it is necessary to prevent the accumulation of water in a timely manner so as not to cause rotten roots.
4. Prevention and treatment of diseases
Pay attention to the underground pests in the seedling stage, they will bite the roots of the seedlings, causing broken seedlings, and in serious cases will lead to the death of large areas of seedlings. If the leaves produce brown round spots, the edges are purplish red and are leaf spot. It occurs mostly in summer and autumn. The pathogen is a semi-known bacteria in fungi. It is mainly for prevention. It can be sprayed with 1:1:100 Bordeaux mixture or 65% Dyson zinc WP 500-600 times in summer. Once every 7 days, 2-3 times in a row.
5. Remove flowers
The flowering fruit period of Polygonatum lasts for a long time, and each stalk has many umbels and fruits, which consumes a lot of nutrients and affects the growth of rhizomes. Therefore, the flower buds should be removed in time before the flower buds are formed. In order to promote the concentrated transfer of nutrients to the roots of the harvest, the yield is increased.
6. Harvesting and processing
Generally harvested in spring and autumn, with good harvest quality in autumn, harvested in the autumn of 3~4 years after harvesting, harvesting roots, removing aboveground parts and fibrous roots, washing off the soil, steaming in steamer to present oil When running, take out drying or drying, or boil in water, remove and dry or dry.
7. Seed retention technology
Rhizoma can be propagated by roots and seeds, but it is better to use roots for propagation. In late autumn or early spring, around March, select healthy and disease-free plants to dig underground rhizomes as breeding materials and grow them directly.
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