What are the cultivation techniques for winter potatoes?

1. Variety selection: Variety selection: Select virus-free potato varieties with high yield, wide adaptability and good commercial properties, such as Zihua 851 and Kexin

No. 3.

2. Preparation of seed potatoes:

1. Generally, small seed potatoes of 25 to 30 grams are selected for sowing. Carry out germination of seed potatoes 20 days before sowing. Soak the intact seed potatoes in 10 mg/kg gibberellin solution for 15 minutes. After soaking, place them in wet sand for germination. Pay attention to keeping the sand moist and prevent water accumulation. When cutting seed potatoes, ensure that each cut has more than one strong bud. After cutting, dip the cut into plant ash to induce germination. When the bud is 1 cm long, the base of the bud appears white

The root point is the criterion for germination. If the buds are too long and break after being covered with grass, the buds are too short and the growth rate is slow.

2. Land preparation After the late rice is harvested, plow the rice field deeply and harrow it, plow the high-yield furrow, break up the soil clods on the border and evenly smooth it.

At the same time, make the border evenly smooth. The face is slightly arched to prevent water damage. The ditch width is 30 cm, the ditch depth is 18 cm, the ring ditch depth is 30 cm, and the border width is 80 cm.

3. Sowing is carried out during the "light snow" to "heavy snow" season. Planting in double rows, plant spacing 30 cm, 3500 to 4000 plants per acre. When sowing

Place the seed potato buds directly on the border with their eyes upward, and press them slightly to make the seed potatoes fully contact with the soil to facilitate rooting and emergence.

4. Cover the seed potatoes with straw neatly and evenly after placing them. Use straw that has been cut for more than 5 days and cover it vertically with the border surface.

The thickness is 8 cm, and about 1,000 kilograms of straw are used per acre. After the straw covering is completed, use the soil from the ditch to press it on top of the straw to prevent

light leakage and the straw being blown by strong winds. Do not cover with mulch after covering with grass. If there is a cold snap, it is necessary to cover it with mulch to prevent coldness. After the cold snap passes, the mulch film should be removed in time

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5. Water and fertilizer management Before sowing, apply 1,200 kilograms of decomposed human excrement, 50 kilograms of compound fertilizer, and 30 kilograms of calcium, magnesium, and phosphorus per acre evenly between the two seedlings

. Pay attention to keep a distance of 5 to 8 centimeters between seed potatoes and fertilizer to prevent rotten potatoes and lack of seedlings. After budding, spray TA milk and powder once every 10 days, and spray 3 times in a row for top dressing outside the roots.

6. After sowing, appropriate amount of water can be irrigated from the drainage and irrigation ditch to keep the soil moist, ensure that the seedlings are strong and healthy, and drain and dry in time. Generally, year-round natural precipitation can meet potato growth needs. In the middle and late stages of potato growth, if it rains, especially when there are continuous spring rains, ditches should be cleared in time to drain water, reduce the humidity in the field, and prevent the high humidity of the rice straw near the soil surface, which is not easy to dry and easily causes late blight and other diseases. occurrence.