Video of Purple Potato planting Technology

Purple potato, also known as black potato, vetch potato, etc., originated in Japan, potato meat is purple to dark purple, rich in selenium and anthocyanin, the nutritional value is very high, has a very high planting prospect, and the yield is very high in our country. Guangdong, Guangxi, Hunan, Guizhou, Shandong, Jiangxi, Shaanxi and other places have been planted, let's take a look at the purple potato planting technology video!

Planting time of Purple Potato

Purple potatoes are usually planted in mid-February. When the temperature reaches about 15 degrees in mid-February, you can come out of the cellar to raise seedlings, first make the seedling bed, put the seeds horizontally on the seedling bed, the row spacing is about 5 centimeters, cover the fine soil, spray the soil with a sprayer, cover the mulch, cover the sky film, moisturize and keep warm, and when the buds grow to more than 20 centimeters, you can cut them into the field. Planting purple potato is required to be harvested in mid-and late October, while fresh purple potato is delayed to early November and must be harvested before frosting. Before storage, clean the potato cellar, remove the topsoil and disinfect it. Before entering the cellar, the purple potato should be sunburned for 1 or 2 days to make the wound heal. During storage, attention should be paid to ventilation and humidity reduction in the early stage and heat preservation and moisturization in the later stage.

Planting Environment of Purple Potato

Purple potato prefers warm climate. The suitable temperature for stem and leaf growth is 18-25 ℃, and stops growing when the temperature is below 15 ℃. The optimum ground temperature for root growth is 22-24 ℃, and stops expanding when the ground temperature is below 20 ℃. It is a short-day crop, which needs sufficient light and high intensity. during the growth period, the suitable soil moisture is 60%-80% of the maximum field capacity.

Planting techniques of Purple Potato

1. Seedling selection: when the temperature reaches about 15 degrees in mid-February, you can come out of the cellar to raise seedlings, first make the seedling bed, put the seeds horizontally on the seedling bed, the row spacing is about 5 centimeters, cover the fine soil, spray the soil with a sprayer, cover the mulch, cover the ceiling film, moisturize and keep warm, and when the buds grow to more than 20 centimeters, you can cut them into the field.

2. Apply sufficient base fertilizer: generally apply 40-50 piculs of high-quality organic fertilizer, 35-50 kg of nitrogen, phosphorus, potassium and compound fertilizer per mu, sprinkle all organic fertilizer before ploughing, and use compound fertilizer as core fertilizer when ridging.

3. Field management: after ridging, take advantage of the wet soil, apply a herbicide to prevent the growth of weeds, ploughing for 2 to 3 times, combined with soil cultivation to help the ridge, purple potatoes must be eliminated in time for fear of waterlogging. When the drought is serious, it is necessary to fight the drought in time if conditions permit. Purple potato rattan disrupt the transport of nutrients, generally to reduce the yield by 30%, can only lift the vine, grasp loose, break the root hair. Don't upset the direction when Tito, put it back in the same place. Due to the strong growth of purple potato vines and more adventitious roots at internodes, Titian is the key to improve the yield of purple potato.

4. Harvest and storage: purple potato should be harvested in the middle and late October, while fresh purple potato must be harvested before frosting. Before storage, the potato cellar should be cleaned, the topsoil should be eradicated and disinfected. Before entering the cellar, the purple potato should be sunburned for 1 or 2 days to make the wound heal. during the storage period, pay attention to ventilation and humidity in the early stage and heat preservation and moisturization in the later stage.

Control of Diseases and insect pests of Purple Potato

1. Black spot of purple potato

[symptoms] Purple potato black spot disease can occur in seedling stage, growth period and storage period, which mainly invades potato seedlings and tubers, the diseased seedlings become black and rotten, black patches grow on diseased potatoes, and the diseased potatoes have bitter taste, and the storage period can continue to spread, resulting in rotten cellar.

[prevention and treatment] after ① harvest, remove the diseased and residual potato in time, and burn it centrally or bury it deeply. ② seriously avoided continuous cropping. ③ chooses high-lying plots for planting, cleans up ditches and discharges stains after rain to reduce humidity. The base of the seedling can be soaked in 1000 times solution of 50% carbendazim for 10 minutes before ④ planting. One week after planting, spray 50% Acetochlor EC 100ml / mu with 50kg water on the soil surface to prevent weeds.

2. Purple potato nematode disease

[symptoms] Purple potato nematode disease is also common in purple potato cultivation. Stem nematode invades potato meat and produces a large number of saliva, which is caused by the infection of miscellaneous bacteria. The discoloration of the damaged potato skin has cracks, and the potato is hollow, so the potato nematode disease is called bran heart disease.

[prevention and control] the control method of purple potato nematode disease is to soak seed potato with 50% phoxim 300 times solution for half an hour before raising seedlings in areas with serious stem nematode disease, so that most of the nematodes in potato blocks can be killed, and the control effect can be more than 90%. Then there is the use of fully fermented manure as base fertilizer. The diseased and residual potatoes should be removed in time after harvest in order to reduce the harm of insect sources to cultivation in the coming year.

3. Purple potato spot disease

[symptoms] Purple potato spot disease is caused by leaf spot mold infection. When it is serious, the leaves die locally or completely. The disease spots on the leaves are round to irregular, reddish brown at the initial stage, yellowish brown or gray later, the edge slightly raised, and small black spots scattered in the spots. That is, the conidium of the pathogen. In the northern region, the pathogens overwintered on the diseased remains with hyphae and conidia, and the conidia spread and infected in the second year. Sweet potato is planted annually in southern China, and the conidia on diseased leaves are repeatedly infected by means of water transmission. There are many Rain Water, the humidity in the field is high, the disease is serious.

[prevention and treatment] ① was used to remove the sick and disabled bodies. At the initial stage of ②, 65% Dysen zinc wettable powder or 70% methyl topiramate wettable powder 1000 times were sprayed, once every 5-7 days, for a total of 2-3 times.