Techniques of raising Potato seedlings

Potatoes like cool weather. The seeds are often used for seed production, but they are also used for seed production. Potato seed seedlings, the seed germination suitable temperature is 21 - 23℃, about 4 - 5 days to start germination, and at lower temperatures, germination time extension takes about 10 - 20 days. - Sowing quantity 5 - 10 g/mu, seedling age about 60 days. Management is basically the same as solanaceous vegetables. The main methods of seedling raising of seed tubers include whole tuber propagation, cutting propagation and seedling propagation. Potato seed tuber can take root at 4 - 5℃, germinate at 5 - 7℃, but grow slowly. The bud grows rapidly and strongly at 10 - 12℃. 18℃ is the optimum temperature for bud growth. From sowing to emergence, potato mainly depends on the moisture stored in potato blocks and has certain drought resistance. Therefore, the requirements for soil moisture during seedling are not strict. The optimum pH of the soil is 4.8 - 7.1. Seedlings used in the seed potato to 50 g/piece is appropriate, each piece of weight is not less than 20 g, and there are 1 - 2 bud eyes, cut into pieces when the knife should be strictly disinfected. The seedling breaking propagation is to reproduce the seedlings germinated from seed potatoes under sweet water, which can improve the propagation coefficient and save the amount of seed potatoes, but it needs to raise seedlings earlier. Potato sowing period, the north for spring, the south can be spring and autumn two seasons. Spring sowing is carried out at 10 cm soil temperature of 6 - 8 ° C, autumn sowing is carried out in August-September, but attention should be paid to high temperature and rain. Seed potato treatment before sowing, seed potato in 200 - 250 times the formalin solution immersed in 20 - 30 minutes, after 6 - 8 hours. Potato dormancy exists. Soaking potato seeds with gibberellin 0.5 - 1.0ppm for 10 - 15 minutes can break dormancy and promote germination. 15 - 20 days before sowing, the treated seed potatoes are placed at 15 - 18℃ and 70% air relative humidity for germination. After 7 - 10 days, the buds grow 1 - 3 cm, let them see the light, make the buds green and sturdy, and plant them at the right time.