What is the normal yield of potatoes per mu?

The normal yield of potatoes per mu is about 3000-5000 jin, if high-quality varieties of potatoes are selected and carefully managed in the later stage, the yield per mu can be as high as 8000 jin. The yield per mu of potato is closely related to planting technology, environment and varieties. Potatoes are suitable to be planted in loose, fertile and acidic soil, and the yield will decrease if the soil is slightly alkaline.

1. Normal yield per mu of potatoes

In general, the normal yield of potatoes per mu is about 3000-5000 jin. If the yield per mu is more than 8000 jin, it is considered as a high-yield potato, and the yield of potatoes will be affected by many factors, such as varieties and planting methods, potatoes like acidic soil, afraid of alkaline soil, the appropriate PH value should be controlled at about 6.0. if the soil is slightly alkaline, it will reduce its yield.

2. Potato planting techniques in spring

1. Select improved varieties

The selection of high-quality and disease-free varieties is beneficial to improve the quality and yield of potatoes.

2. Slicing and budding

Generally, sprouting can begin at the beginning of March. When potato seeds are cut into pieces, at least one bud eye should be ensured for each seed block, and 10-15 pieces per jin of potatoes should be cut. After cutting, carbendazim powder is used to soak the seeds in 200 times solution, soak the seeds in water for sterilization and disinfection, and then after the seed pieces are dried, they can be placed on the seedling bed to accelerate germination.

3. Sprouting method

Sand can be used to promote germination in the corner above 15 ℃ at room temperature, generally 1 layer of sand and 1 layer of seed block, or dig a pit in the outdoor ventilated and sunny place to accelerate germination, the pit depth is about 25cm, then 1 layer of sand layer of seed block, no more than 3 layers, and then cover with arch shed film, add grass curtain to keep warm in the evening, the above two methods should be watered 1-2 times during budding, when the bud grows to 0.5-1.0cm. You can start sowing.

4. Land selection and preparation

Before sowing to check the soil moisture, if the soil moisture is not good, you can consider irrigation ditch to create soil moisture, soil moisture can choose 7-10 days before sowing, potato planting is common in double ditches, ditching can be in accordance with large 50cm, small 40cm, suitable for planting in loose, fertile soil.

5. Sowing and covering the film

There are two ways to put the seed block in the ditch: one is to put the bud down into the pit, so that the root of the potato grows strong, and the number of potatoes is small but the block is large, but the emergence is 2-3 days late.

Another method is to put the buds up into the pit, so that the roots of the potatoes will be relatively short, the potatoes will be small but numerous, and the seedlings will emerge 2-3 days earlier. After sowing, the potato ditch should be dug from both sides of the line, and the gaps in the small lines should be filled, then covered with plastic film and gently compacted.

6. Seedling stage management

About 20 days after sowing, the seedlings will gradually expose the soil, then the plastic film can be scratched and let out at the seedling place, and when the seedlings grow to 10cm high, the plastic film around the seedlings will be pressed strictly with soil, which is conducive to water conservation and grass pressure.

Potatoes do not need to be watered in the early growth stage, but can wait until after flowering, during which there is dry and rainless weather, but every 10 days can be watered once, usually watering 2-3 times will mature, 10 days before harvest to stop watering, seedling stage to prevent aphids, thrips and other pests.

7. Scientific fertilization

When the seedlings are exposed to 80% of the soil, the quick-acting fertilizer for raising seedlings should be re-applied once, and Di Guo Zhuang Diling can be sprayed at the young potato seedling stage to promote the expansion of potatoes, smooth fruit surface, strong fruit shape, high quality and high yield. Potatoes like to apply farm manure. 4000-5000 jin per mu can be applied during the growth period, and nitrogen, phosphorus and potassium should be applied together with nitrogen, phosphorus and potassium during the growth period.

Potatoes have a large demand for potassium, and the proportion of nitrogen, phosphorus and potassium fertilization is 1.85. Potato likes to absorb ammonium nitrogen and sulfur.

8. Control of diseases and insect pests

The common diseases and insect pests in the middle and later stage of potato are downy mildew, late blight, bacterial wilt and so on. in the early stage of the disease, 500-fold solution of methyl mancozeb can be used, combined with new high-fat film to spray when the dew is dry in sunny days.

If there is bacterial wilt, the whole plant should be pulled out and then incinerated, and lime should be sprinkled around the disease hole, or 0.5% formalin solution should be used for root disinfection, and then 2000 times of agricultural streptomycin solution should be sprayed to prevent and cure the disease. It is helpful to control the spread of diseases and insect pests.