The Best cultivation method of Autumn sowing Potato

Autumn potato cultivation usually begins to sow in August and is harvested in November. The high temperature in the early stage is beneficial to the growth of aboveground stems and leaves, and the temperature is low in the later stage, which is suitable for the expansion of the lower part of the ground. The yield is higher than that of spring sowing, but it is easy to rot and die after sowing. Whole potato sowing and strengthening field management can avoid this phenomenon and obtain higher benefits. The main cultivation techniques are as follows.

The main results are as follows: (1) the sowing time of whole potato sowing autumn potato cultivation coincides with the high temperature and rainy season in August, slicing sowing is easy to rot and die seedlings. Whole potato sowing can reduce the dead seedlings in autumn, prevent degradation and increase yield.

1.1 the selection of standard seed potatoes for autumn sowing should be about 50 grams of small potatoes harvested in advance and selected in spring, which should be injury-free, disease-free, bright skin color and moderate size, about 200 kilograms of seeds per 667 square meters.

1.2 the treatment of whole potato sowing whole potato is slower than slicing, and spring potato is used as seed, and seed potato is dormant in autumn sowing. Germination or drug soaking should be carried out before sowing. Generally, soak the whole potato in 1520 mg / L gibberellin solution for 20 minutes 5 days before sowing, remove it and bury it in wet sand and sow seeds when the bud is 1 cm long.

1.3 suitable time for sowing autumn potato sowing too early, high temperature, easy to rot seeds, lack of seedlings, serious virus disease, too late, insufficient growth period and low yield. The seeds should generally be sown in North China from August 5 to 15.

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Sowing method

The sowing of autumn potato is generally different from that of spring potato, because autumn potato sowing is in the season of high temperature and strong light, in order to create a cooler environment, it should be sowed on the back shady slope to facilitate early and even seedling emergence, and the sowing time should be 10 ∶ 00.

Before, 15 ∶ 00 later. And with the trench, with sowing, with the cover of soil. And dig drains. Generally, the row spacing is 60 cm, the plant spacing is 25 cm, and 5000 seedlings are protected per 667m2.

3. Field management

3.1 watering in time after watering and sowing, keep ridges and furrows moist, but the amount of water should not be too large, and ploughing in time after watering, and strive to emerge seedlings early. The management after emergence should be carried out as soon as possible to strive for the Autumn Equinox to promote the potato seedlings before and after.

Every time the water is watered, the ridges and furrows should be ploughed once, combined with wide ridges to cultivate the soil to facilitate the growth of roots and leaves, and the small water should be watered frequently after emergence to keep the soil moist. After October, the watering times can be reduced, only once before frost to prevent frost.

3.2

Forced fertilization

Autumn potato can emerge about 10 days after sowing, so topdressing should be applied in time to promote the growth of aboveground stems and leaves. Generally, 10 kg of ammonium sulfate or 5 kg of urea per 667 square meters, and the second topdressing should be about 20 cm in height.

OK, 15kg urea is applied every 667 square meters. If the stems and leaves are weak and the leaves turn yellow, the amount and times of topdressing should be increased appropriately. But it must be done before October 10th. Otherwise, the temperature in the later stage is low, the plant growth is slow, and the absorption capacity is low.

Small, fertilizer can not give full play to the role, the effect is not good.

3.3 ploughing, weeding and soil cultivation

Intertillage and weeding should also be carried out as soon as possible. After emergence, the first intertillage can be deeper, and the second intertillage should be carried out when the seedling height is about 20 cm.

Cultivate the soil once. Cultivate the soil for the second time when flowering, do not bury the lower stems and leaves when cultivating the soil, and the third cultivation can be carried out in late October to keep the tuber from frost.