Detailed Explanation of Fertilization and Watering Methods and Technical Points for Schisandra chinensis

(1) Watering and Fertilization

Schisandra chinensis prefers fertilizer and needs sufficient water and nutrients during the growing season. After planting and establishment, water frequently to keep the soil moist. Irrigate once before the ground freezes to aid overwintering. During the bud differentiation, flowering and fruiting stages, in addition to sufficient water, large amounts of nutrients are also needed. Apply chemical fertilizer twice a year: the first application during the leaf expansion stage, with quick-acting nitrogen and potassium fertilizer. The second application after the plants flower (mid-growth period, early July), with quick-acting phosphorus and potassium fertilizer. As the plant grows larger, the fertilizer amount increases year by year: ammonium nitrate 25-100 g/plant, superphosphate 200-400 g/plant, potassium sulfate 10-25 g/plant. Combined with deep autumn plowing, apply decomposed farmyard manure (pig manure) at 3-5 m3 per mu. Apply alternately on both sides of the trellis every other year: in the first two years, apply close to the planting trench wall; after the third year, open a ditch 30-40 cm deep between the rows, fill with manure and cover with soil immediately.

(2) Fertilization at the Seedling Stage

Apply topdressing twice at the seedling stage. The first application is done when the shade shed is removed, opening a furrow between seedling rows and applying 200-250 g of ammonium nitrate and 50-60 g of potassium sulfate per seedbed. The second application is done when the seedlings are about 10 cm tall, applying 300-400 g of diammonium phosphate and 60-80 g of potassium sulfate per seedbed. After fertilization, appropriately increase the frequency of watering to promote seedling growth.