Since the spring sowing potato has a short sowing time, the seedlings will be seeded soon after sowing. To obtain high yields, it is necessary to make good six passes.
One, site preparation
Potatoes are tuber crops. Tubers are enlarged. They need to be loose, deep, and have a good layer of organic matter. Therefore, the potatoes should be deep-swept once in the first half of the planting period, and the planting time should be deepened once more. The depth of ploughing should be 30. - 40 cm.
Second, choose
There are many varieties of potato, seed potatoes should be selected for the local growth and high yield of fine varieties, select buds depression, no spots, no wormholes, no wounds of potato, the size of about 50 grams is appropriate.
Third, disinfection
Seed potatoes are disinfected to kill Late Blight bacteria that lurk in tubers. The seeds were soaked in 200-fold formalin solution for 4-6 minutes. The seed potatoes were then piled up and covered with a plastic film for 2-3 hours before being spread into a thin layer to dry. It can also be soaked in warm water at 40-45°C for 30 minutes.
Fourth, base fertilizer
The potato growth period is relatively short, and the amount of base fertilizer should account for about 70% of the total amount of fertilizer. Generally, the amount of home-grown pigs, cattle, sheep manure, and other miscellaneous fertilizers of 4,000 kg, and 30 kg of superphosphate, should be used for slopes and barren lands. .
V. Sets
In order to increase land use efficiency, the use of wide-narrow rows and double-row nests is an effective way to increase the yield of potatoes and other crops. Density 2000-2500 points per mu is appropriate.
Sixth, management
When the potato seedlings began to sporadicly unearthed, Mu followed up with 1,500-2,000 kilograms of rare human fecal urine; after applying seedlings, 12 kg of urea was applied at the Mu point; when the seedling height was about 50 cm, 25 kg of ammonium bicarbonate was applied in the Mu depth. After topdressing, it is necessary to cover the soil with fertilizer to prevent the fertilizer from volatilizing. In combination with top dressing, cultivators are used to remove cultivars in the field. When the seedlings grow to 30 cm, they are sprayed with paclobutrazol for 2-3 times to control the growth of potato shoots to promote underground tuber enlargement.
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