Autumn potato planting notes! Pay attention to the selection and fertilization

Select variety

Covering wet sand with a thickness of 5~6 cm, spraying water once every 2 days, the growth period of autumn potato is short, must use early-maturing varieties with early potato, fast tuber swelling, light-insensitive, and short dormancy period, such as Lu Yin No. 1, Zheng Di No. 6 and so on.

Soaking seeds and germination

The sowing date of autumn potato in the autumn is high in the high temperature and rainy period. The potato is cut into pieces and then sown, and the rotten potatoes and dead cockroaches are seriously affected. Therefore, sowing potatoes in autumn and autumn should be planted with whole potatoes.

Choose potatoes that are harmless, disease-free, crack-free, bright-colored, and moderately sized, and germinated before planting. There are two methods of germination: one is the germination of the medicament. Treatment with gibberellin and other agents can break the dormancy of the potato and ensure that the seedlings are strong. For the general variety, 5 days before sowing, first soak for 5 minutes with 5×10~6 gibberellin solution, then remove it and germination for 5 days in the wet sand. The bud is 1~2 cm long and can be sown. The species with a long dormancy period are first soaked in a 10×10~6 gibberellin solution for 20 to 30 minutes, and then buried in the wet sand to promote germination. The second is the sand bed germination. About 25 days before sowing, first soak the seed potato with clean well water, then lay 5 cm thick wet sand on the ground and spread the soaked seed potatoes on it. The seed potato and the surrounding buds can be planted about 2 cm long. It is necessary to prevent the humidity of the sand from being too bad.

Sowing off

During the sowing of autumn sowing potatoes, if there is a long and dry weather, the soil moisture is small, which will cause the pieces to lose water and shrink, lose vitality, and cause seedlings and seedlings. Control measures: 1. Dispose of the seeds and wait until the grievance is sufficient. 2. Daejeon opens at a depth of 3 meters and digs the seeding ditch. The line spacing is about 40~50 cm. 1~2 days before sowing, the diversion and ditches will be immersed in the water to make the sowing ditch and the soil on both sides moist. The planting area should be loosened and placed in a plant spacing of 25 cm. 3. If the planting is in a sunny day, it is best to carry out before 10 am or after 5 pm, and carry out wrong planting between the lines to facilitate ventilation and lighting. 4. After sowing, cover the surface of the grass with grasshoppers, thatch, and straw, and remove it after 20%~30% of the seedlings.

The sowing period is generally 5500~6000 points per acre, with a seed amount of 160~180 kg/mu, and the row spacing is 40×25 cm. When the height of the seedling is about 15 cm, the soil is cultivated to increase the permeability of the soil, which is conducive to high yield.

Topdressing and Peiguanuan

Due to the straw cover, the seedling stage may not be soiled, and the soil is harvested once before and after the 12-leaf period.

Autumn potato needs more fertilizer, and the growth period is short. It should be based on base fertilizer, and it can be seen 2 to 3 times. During the germination period, the potato fertilizer is chased once, and 25 kg of high-nitrogen compound fertilizer is used per mu. The top dressing can be combined with the soil; the potato stage (before and after flowering) is sprayed with 3% potassium dihydrogen phosphate and 3% urea solution. Stems and leaves 1 to 2 times. In addition, in the water management of autumn potatoes, on the one hand, it is necessary to prevent waterlogging and rotting of potatoes during the seedling period. On the other hand, it is necessary to prevent water shortage during the potato-forming period, especially before and after flowering, which is extremely sensitive to water, and water shortage can seriously reduce production. When irrigating, dip the ditch with small water, and it is not advisable to pass over the surface.

Pest off

The main pests and diseases of autumn potato include viral diseases, late blight, mites, mites, and potato ladybugs. Control method: Viral disease can be sprayed with 1.5% phytopathogenic emulsion 1000 times solution or virus A wettable powder 500 times solution at the beginning of the disease; late blight can spray 64% antivirus WP WP 500 times in the occurrence period Spray control; cockroaches can be killed with 50% phoxim 1000 times in the occurrence period; mites can be sprayed with 40% omethoate 1500 times in the occurrence period; 50% of the potato worms can be used for killing pine Oil 1500 times liquid spray control.

Harvest off

In order to prolong the growth period of autumn potato, more nutrients will be accumulated. Under the premise of not being affected by freezing, the harvest should be delayed until the frost is used to kill all the plants on the ground.

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