Potato planting time in spring

Potatoes are common vegetables in our daily life and distributed all over the country. With the increase of planting area, the output of many farmers is low, which seriously affects farmers' income.

Spring is the time to sow potatoes.

So, when is the planting time of potatoes in spring? What are the planting techniques of potatoes in spring? Let's have a look.

The planting time of potato in spring is 1, and it is planted in the northeast and northwest regions such as Gansu and Qinghai, generally from mid-late April to early May in spring (that is, after Grain Rain in the 24 solar terms and before long summer), and harvested in autumn. Usually, potatoes can only be planted for one season a year, which is called one-season planting areas in the north and northwest.

2. Shandong, Hebei, Henan, Shanxi, Jiangsu, Hunan and Hebei.

In Shandong, Hebei and Central Plains, spring potatoes are planted in February and March (after the rain and before the earthquake in the 24 solar terms), and June-July is the harvest season; Autumn potatoes are planted in August (after beginning of autumn in the 24 solar terms, but before summer), and the first harvest is10 ~1/kloc-0.

3, Jiangsu, Zhejiang and other central and southern provinces can plant spring potatoes in1~ February (after the severe cold in the twenty-four solar terms, before beginning of spring, spring begins), and harvest them in May ~ June; Sow in September in autumn (after the dew in the 24 solar terms and before the autumnal equinox), and harvest in 65438+February.

These areas are called the Central Plains and the Central and South China.

4. Guangdong, Guangxi, Hainan, Yunnan, Guizhou and other places can plant potatoes in the gap after rice harvest in autumn.

Generally, it is sown in the middle and late June of 65438+ 10 ~10/0 (after the first frost of the 24th solar term, before beginning of winter), and harvested in February and March of the following year.

Because the growing season is mostly in winter, these areas are usually called southern winter agricultural areas.

The planting technique of potato in spring is 1, and breeding of improved varieties is an important link in high-yield cultivation of potato.

2. Cut into pieces to accelerate germination in the first 20 days and start germination in early March.

When potato seeds are cut into pieces, each piece has at least one bud eye.

10- 15 RMB/kg is appropriate.

The cut seeds are soaked in dry mixed ash or carbendazim powder 1: 200 times water for disinfection.

There are two methods to accelerate germination of seed blocks in seedbed after drying: one is to accelerate germination with sand in the corner above room temperature 15℃, and the seed blocks are treated with a layer of sand; The second is to dig a pit in the east-west direction of outdoor ventilation sunrise to accelerate germination. The pit is about 25 cm deep. One layer of sand is suitable for seed blocks, and three layers are suitable. Then cover the arched shed film, and then cover the straw curtain to keep warm at night.

The above two methods should be sprayed with water 1-2 times to prevent drying.

When the buds grow to 0.5- 1.0 cm, start sowing.

3. Look at the soil moisture before planting. If the soil moisture is not good, irrigation canals can be considered, and the soil moisture should be built 7- 10 days before planting.

Potato planting is generally double ridge and furrow planting, and large rows of 50 cm and small rows of 40 cm can be used when furrowing.

The expansion of potato stems needs loose and fertile soil.

4. When sowing with plastic film, there are two ways to put the seed blocks into the ditch: one is that the seed buds are facing down, and the potatoes grown in this way grow in strong roots, and the potatoes are few and 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 emerge 2-3 days earlier.

After planting, soil is taken from both sides of the big row to cover the space of the potato ditch and the small row, covered with microfilm and compacted.

5. After the emergence and seedling management are clear, the seedlings will emerge about 20 days after sowing. At this time, the microfilm can be broken at the seedling flushing place to prevent the seedlings from steaming.

When the seedlings grow to the height of 10 cm, the film around the seedlings should be compacted with soil to prevent water from pouring on the grass.

Potatoes should not be watered at the early stage of growth, and then watered after seeing flowers.

If there is no rain, you can water it once every 10 day, generally 2-3 times to ripen, and stop watering before harvest 10 day.

Control pests such as aphids or thrips at seedling stage.

6. Scientifically fertilizing potatoes should master the principle of "attacking before, staying in the middle and controlling the tail" throughout the growth period. When 80% of the seedlings are unearthed, quick-acting seedling-lifting fertilizer is applied again. Potato seedlings should be sprayed with Diguozhuangdiling, so as to thicken the nutrition transportation pipeline of underground fruits, improve the vitality of underground fruits, and make the fruits smooth in surface, strong in shape, high in quality and high in yield.

Potatoes like to use farmyard manure, and it is advisable to use 4000-5000 kg per mu. At the same time, in the rational application of chemical fertilizers, nitrogen, phosphorus and potassium should be used together.

Potatoes need a lot of potassium, and the scientific and reasonable ratio of NPK fertilizer is1.85:1:2.1.

Potatoes like to absorb ammonium nitrogen and have a higher absorption rate of sulfur.

7. Pests and diseases control potato mainly includes late blight, downy mildew, bacterial wilt and other diseases. At the early stage of the disease, mancozeb 500 times solution and new high-fat film were sprayed on the dry sunny day of dew to prevent bacterial wilt. It was found that the whole plant should be pulled out and burned centrally, and lime should be sprayed around the diseased area or the roots should be disinfected with 0.5% formalin solution, and then agricultural streptomycin 2000 times solution+new high-fat film should be sprayed to prevent bacterial wilt.