Black potato planting points

With the rise of agriculture and tourism picking agriculture in the park, the demand for specialty potato varieties has gradually increased. Black is a new breed of colored potato that combines nutrition, health care and appreciation. In addition to the superior quality of delicate, fragrant and nourishing vegetables, It also has a unique bright color appearance and has functions such as cancer prevention and beauty. The cultivation area of ​​black potatoes in the country is still small. The price per kilogram is between 6 and 8 yuan, which is 6 to 8 times that of ordinary potatoes.

Cultivation points

1. Germination and cutting: 20 to 30 days before sowing, the selected seed potatoes were placed under 20°C ambient conditions, sprayed with water and covered with grasshoppers. When the young shoots grow to the size of the soybeans, the seed potatoes will be placed in a warm and sunny place and the seedlings will be green and vigorous. One day to two days before sowing, the seed potato was cut into pieces, and the weight of each seed potato was about 25 grams. A small piece of seed potato is cut vertically, and each cut must have a top bud; the large seed potato is cut open from the tail, and the weak shoots are eliminated. The buds are arranged in order, cut obliquely from the top, and finally the top is divided into two. The knife must be strictly disinfected with 75% alcohol.

2. Site preparation: Black potatoes have a short growing period, require more concentrated fertilizer, spread 3 to 5 cubic meters of organic fertilizer per acre, 20 kg of diammonium phosphate, 20 kg of urea and 10 kg of potassium sulfate. Fine. Black potatoes should not be dense, should be spaced 70 cm apart, ditch depth 5 cm, when the ditch is administered phoxim granules to prevent underground pests such as tigers. Seedlings were planted at a spacing of 25 cm to 30 cm, and about 3,500 plants were maintained per acre. Immediately after sowing, the ridges were repressed and well-formed, and the mulching film was sprayed with the herbicide.

3. Field management: seedlings should be promptly broken after the emergence of the seedlings, and the seedlings should be sealed with a wet seedling. When the seedlings are aligned, in order to promote the early emergence of seedlings, foliar spray can be applied to the leaves; in the flowering period, the buds are removed timely. To increase the rate of large potatoes, foliar spray can be applied to the ground. The main disease of black potatoes is late blight, insects are aphids and ladybugs. The prevention of late blight can be sprayed with 64% antivirus 600 times liquid + new high-fat film; the control of aphids and ladybugs can be sprayed with 18% Lethburn 1000 times liquid + new high fat film.

4. Timely harvest: According to the market supply and marketing situation timely harvest, harvesting process to minimize mechanical damage, so as not to affect the quality of goods. (China Plant Protection Network: Wei Linfei)

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