Sandy loam soil is the best choice for seedling cultivation, which should have a slight slope to facilitate drainage, deep ploughing about 33 cm, and applying fully decomposed high-quality farmyard manure, about 5 000 kg/667 m2.The height of the bed should be determined according to the terrain and the underground water level. The width of the bed surface is 1.2m, and the length is determined by oneself.
Keep the bed surface moist, water the seedlings in time after they come out of the ground, and do not water the seedlings when they grow to 15cm.In the rainy season, attention should be paid to drainage, and the frame should be built in time when it is 30 cm long.
When the seedling height was 3-7cm, dilute fecal water should be applied once, and the dosage was about 1200kg per 667m2.Dung water is applied once again in summer, the dosage is 1500-2000kg per 667m2, and no manure is applied after ridge sealing.
The seedling height of 5cm should be built with sunshade, the standard is that the bed surface can transmit light, the best material for sunshade is black pine branch, and the seedling height of 10cm should gradually remove the sunshade.