Second, the planting technology of longevity vegetables: the propagation of seedlings. Leaf sweet potato is usually planted with Acer truncatum and then cut and propagated. Seedling raising with plastic film in spring is half a month earlier than that in open field, and the seedling quantity increases by 40%.
(1) Sowing in time: Sowing begins when the temperature is stable at 65438 04 degrees Celsius in spring. Seeding in hotbed requires a bed temperature of 20 ~ 25 degrees Celsius.
(2) Preparation for Miao Di: In Miao Di, sandy loam facing south, sheltered from the wind and sunny, convenient for irrigation and drainage, which has not been planted with onions, garlic, ginger, jute, taro and cassava for more than three years, is selected as nursery land, and the border is 20 cm high and 120 cm wide, ready for sowing.
③ Disinfection treatment of seed potatoes before sowing: Soak seeds with 500 times solution of 50% thiophanate methyl or 25% carbendazim 1000 times solution 10 minute. The planting density is 2-3 rows per border, the row spacing between plants is 20cm× 30cm, and the potato needs 22,500kg per hectare of seedbed. Pay attention to the head and tail of potatoes, and don't turn them upside down. Potato stems are arranged at an angle of 45, and should be on a horizontal plane, and the buried depth should be slightly exposed to the soil surface. When planting potato seeds, leave about 6 cm on both sides of the border, shovel 3 cm of soil and cover the soil. After each border is covered with soil, the plastic film should be firmly tied, and the soil should be pressed on both sides to remove the soil and sundries on the film, increase the light transmission and raise the temperature. Generally speaking, after sowing, seedlings begin to emerge about 15 days. When the seedling height is 1 cm, the plastic film is perforated to protect the seedlings, and the film is pressed with fine soil.
Third, longevity vegetable planting technology: after the seedlings grow, the temperature in the plastic film should be checked frequently. When the seedling height is 10 cm, if the temperature in the film is 35 degrees Celsius at noon, the film should be uncovered in time, thin water and fertilizer should be applied, and the ditch should be cleared and the soil should be cultivated to protect the seedlings. When the seedling length is about 15cm, the seedling root cutting should be cured in time. 3-4 days after cutting, topping at noon on sunny days to promote branch germination and growth. When the branches grow to 25 cm, they can be cut to raise seedlings.
Fourth, longevity vegetable planting technology: planting.
① Base fertilizer should be applied in the planting area: the base fertilizer should be cooked farmyard manure and calcium superphosphate. Make a wide bed with high ridges to prevent water accumulation in rainy season. The bed is 60 ~ 70 cm wide and planted in two rows.
(2) Planting method: according to the plant spacing of 25-30cm, dig up the soil obliquely with a spatula and insert potato seedlings; Potato seedlings are about 20 cm long and buried about 10 cm deep. Water the whole border after insertion. Generally speaking, longevity vegetables can be harvested 40-50 days after cutting. First, harvest the top and make the lateral branches sprout. After the leaves grow fat, harvest them from the base of the petiole. In the planting technology of longevity vegetables, there are certain technical guidance for each growth stage of longevity vegetables, so it is very helpful for longevity vegetables planting. Longevity vegetables grow rapidly, with short growth cycle, high temperature and drought resistance, and can adapt to the summer climate well. It is a high-quality green leafy vegetable in summer, with natural and unique taste and certain nutritional value, so it is favored by people and sells well.