Cut into pieces to accelerate germination:
20 days before sowing, the germination began at the beginning of March.
When the potato seeds are cut into pieces, each piece has at least one bud eye.
10 ~15 piece/kg is appropriate.
After cutting, dry mix with ash or carbendazim powder1:200 times to sterilize the seeds soaked in water.
After the seed blocks are dried, the seedbed will start to accelerate germination.
In the corner above room temperature 15℃, sand is used to accelerate germination, and seed blocks are planted layer by layer.
Dig a hole in the east-west direction in the outdoor ventilated Chaoyang to accelerate germination. The depth of the hole is about 25 cm, and it is advisable to have one layer of sand and one layer of seed blocks, and then cover it with an arch shed film, and cover it with a straw curtain at night to keep warm.
The above two methods should be watered1~ 2 times during germination to prevent drying.
When the buds are 0.5 ~1.0 cm long, start sowing.
Soil preparation and ditching:
Look at the soil moisture before planting. If the soil moisture is not good, consider irrigation ditch to build soil moisture.
The period of soil moisture construction should be 7 ~10 days before planting.
Potato planting is generally double furrow planting, and when ditching, large rows of 50 cm and small rows of 40 cm can be used.
Seeding cover film:
The best period is from the vernal equinox to the Qingming Festival, and the planting distance can be controlled at 20 cm before the vernal equinox.
Spray octanoic acid1:10000 times of water along the ditch before sowing to prevent underground pests.
Organic fertilizer can be directly sprinkled in ditches or during soil preparation; Chemical fertilizer can be put into the ditch or scattered between seed blocks (be careful not to contact with seed blocks directly).
When sowing, there are two ways to put the seed blocks into the ditch: one is that the seed buds are facing down, and the potato roots grown by this method are long in Miao Zhuang, and the potatoes are few but large, but the seedlings are 2 ~ 3 days late; Another method is that the seed buds are facing up. The potato roots grown by this method are relatively short, the potatoes are small but many, and the seedlings are 2 ~ 3 days earlier.
After planting, take soil from both sides of the big row, cover the potato ditch and the space of the small row, cover it with micro-film and compact it tightly.
Emergence and management of seedling stage;
After the Qingming Festival, about 20 days after sowing, the seedlings will be exposed. At this time, the microfilm can be broken at the seedling flushing place to prevent steaming seedlings. When the seedlings grow to a height of 10 cm, the film around the seedlings should be tightly pressed with soil to keep the water from watering the grass.
Potatoes should not be watered in the early stage of growth, and then watered after seeing flowers.
If there is no rain, it can be watered once every 10 day, usually 2 ~ 3 times to ripen, and the watering should be stopped 10 day before harvest.
Prevent pests such as aphids or thrips at seedling stage.
Rational fertilization:
Potatoes like to use farmyard manure, and it is advisable to use 4,000 ~ 5,000 Jin per 666.7 square meters. At the same time, nitrogen, phosphorus and potassium should be used together when applying chemical fertilizer properly.
Potatoes need a lot of potassium, and the scientific and reasonable ratio of nitrogen, phosphorus and potassium fertilizer is1.85:1:2.1.
Potatoes like to absorb ammonium nitrogen and have a higher absorption ratio of sulfur.