crude medical herbs huang lian

After Huang Lian was planted, a small amount of cattle horse dung and smoked soil were immediately applied as knife-edge fertilizer. Every spring in early spring, summer after harvest, and in winter from October to November, each fertilizer is applied once. In spring and summer, nitrogen and phosphorus and other fast-acting fertilizers are mainly used. Winter fertilizer is dominated by cattle and manure and smoky soil. After each fertilizer, soil should be cultivated. In the first and second year, about 1cm in earth and 2 to 3cm in the third and fourth years.

Before weeding, weeding should be carried out. One to two years after transplanting, the seedlings are exposed to large pores and prone to weeds. Each year, weeding should be carried out 4 to 5 times. Wealth berberine should be quarried for four to five years, and weeding should be conducted 3 times a year with top dressing. Planting and planting in the greenhouse, after the seeds were harvested in May of the same year, the cover shed should be lifted to open the shed to suppress the growth of the leaves and promote the enrichment of the rhizomes; the forests should be planted and the sheds should be trimmed in the first 3 years after the planting. It is reduced from about 70% when planting to 20% to 30%.