① Seeding. In late March, when the height of the seedlings is about 3 cm, the diseased plants and missing trees are found, and the seedlings should be replenished immediately. Generally, the seedlings should be checked 2 ~ 3 times.

② Drainage and irrigation of water. Pay attention to ditch drainage in rainy season to avoid root rot; Water when it is dry. Watering should be done in the evening when the weather is hot. The principle is that the amount, frequency and time of irrigation and drainage should be combined with its characteristics, growing season, local climate and soil conditions, so as to achieve timely, appropriate and reasonable irrigation and drainage, that is, "looking at the sky, the ground and the seedling situation."

③ intertillage, weeding and ridging. Intertillage is the work of cultivating the soil to loosen it. Its purpose is to eliminate weeds, loosen soil, keep soil moisture and raise soil temperature. Weeds do great harm to the growth of drug seedlings, not only compete with drug seedlings for water and nutrients in the soil, but also affect the sunshine and air needed by plants. At the same time, it is also a hiding place for germs and pests. Eliminating weeds and keeping the field clean are extremely important management measures to ensure the normal growth and development of drug seedlings. To cultivate the soil is to cultivate the soil at the root of the plant, also known as earth-breaking. The main function is to increase the soil temperature and thicken the loose layer of the soil, expand the area where the surface soil absorbs sunlight, prevent lodging and drought, thicken the soil and prevent water evaporation. Methods: In the early growth stage, intertillage and weed 1 time every month to keep the soil loose. Because the plants are brittle and easy to be broken by strong wind, it is necessary to cultivate the soil for 3 ~ 6 cm in June-summer solstice to prevent lodging.

④ Fertilization. In late March, after replanting seedlings, topdressing seedling fertilizer was applied. Pouring human and animal manure 1000 kg every 667 m 2; Topdressing 1 phosphate and potash fertilizer before and after Grain Rain in late April and before and after long summer in early May respectively, and applying calcium superphosphate15 ~ 25kg to each seedling point.

(5) topping and bud removal. In order to reduce nutrient consumption, when 8 ~10 leaves are produced, the tips should be picked and topped, and axillary buds will grow after the tips are picked. All axillary buds must be destroyed in time to prevent excessive growth.