Planting technique of Polygonatum yunnanensis

Polygonatum yunnanensis is a common medicinal material, which is born in shady mountain shrubs and grass on the edge of the forest. it is hardy and the seedlings can survive the winter in the field, but it is not suitable to grow in dry areas. So, what is the planting technology of Polygonatum yunnanensis?

I. selection of land and land preparation

Choose moist and fully shaded plots, and the soil should be loam or sandy loam with loose texture and good water retention. Before sowing, first turn deeply once, combined with land preparation, apply farm manure 2000 kg per mu, turn into the soil as base fertilizer, and then rake fine leveling, make the border, the width of the border is 1.2m.

II. Field management

In the early stage of growth, the weeds should be ploughed and weeded frequently, once a year in April, June, September and November, shallow hoe and proper soil cultivation should be carried out, and weeds should be pulled in the later stage. In case of drought or the need for timely watering in sunny and dry places. After the first three times of intertillage, 1500 kg of soil fertilizer was applied per mu, 50 kg of superphosphate and 50 kg of cake fertilizer were mixed well, and then ditched and applied between rows, and then covered with soil and covered with fertilizer. Huang Jing avoids water and shade, and should pay attention to drainage and intercropping corn.

III. Pest control

The common diseases and insect pests of Polygonatum yunnanensis are black spot and grub. Black spot disease occurs more frequently in spring, summer and autumn, causing damage to leaves. Prevention and control methods: clear the garden during harvest and eliminate the disease and residue; spray 1-100 Bordeaux solution in the early stage, once every 7 days, 3 times in a row.

Grubs do harm to the larvae, harm the roots, bite off the seedlings or eat the roots of the seedlings, resulting in seedling breakage or root cavity, causing serious harm. Control method: the seed can be mixed with 75% phoxim EC according to 0.1% seed amount, or irrigated with 1000 times of 90% trichlorfon during the field occurrence period.

IV. Harvesting and processing

It is generally harvested in spring and autumn, and the harvest quality is good in autumn. After 3-4 years of cultivation, the aboveground parts are withered and harvested, the rhizomes are dug, the aboveground parts and whisker roots are removed, the soil is washed, steamed in the steamer until it is oily, it is dried or dried, or boiled in water, it is taken out to dry or dry.

5. Seed retention techniques

Rhizoma Polygonatum can be propagated by rhizome and seed, but it is better to use rhizome in production. In late autumn or late March in early spring, robust and disease-free plants can be selected to dig underground rhizomes as propagation materials and planted directly.

Yunnan Polygonatum is yin-loving, so in the process of planting, you must pay attention to avoid direct sunlight and exposure.