The best cultivation method of autumn sowing potato

Cultivation of autumn potatoes is generally started from August and harvested in November. The early temperature is high, which is conducive to the growth of stems and leaves on the ground. The temperature is low at the later stage and is suitable for the expansion of the underground. The yield is higher than that of spring sowing, but it is easy to die after sowing, and sowing of whole potatoes is adopted. The strengthening of field management can avoid this phenomenon and achieve higher benefits. The main cultivation techniques are as follows.
1 The whole potato planting sowing potato planting season is in August high temperature and rainy season, cut into pieces and easy to die, the use of whole potato sowing can reduce the dead in autumn, deadlock, prevent degradation, increase production.
1.1 The selection of standard seed potatoes for autumn planting should be early harvesting of spring seeds and selection of about 50 grams of small sweet potato pieces. These pieces of potatoes should be free from injury, disease-free, bright-skinned and moderate-sized, and require seeds every 667 square meters. 200 kg or so.
1.2 Treatment of Whole Potato Planting sowing of whole potatoes is slower than cutting and sowing, and using spring potato as seed, seed potato is in dormant state during autumn sowing, and germination or drug soaking and germination should be performed before sowing. Generally, 15 days before sowing, 15~ 20 mg / l of gibberellic acid soaked for 20 to 30 minutes, remove and germinate buried in wet sand until the buds grow 1 to 2 cm when sowing.
1.3 Suitable sowing and sowing of autumn potato sowing are too early in the morning with high temperature, easy to rotten seedlings, lack of seedlings, serious virus disease, too late growth period is insufficient, and the yield is low. North China should generally be sown on August 5-15.
2 sowing method Autumn sowing potato is generally different from the spring sowing, because the autumn sowing in the high temperature and light season, in order to create a more cool environment, should be sown on the backside slope to facilitate the early seedling Qi, sowing should be 10 Before 00: After 15:00. And with the ditch, with sowing, with cover soil. And dig drains. General spacing 60 cm, spacing 25 cm, 5000 seedlings per 667 square meters.
3 Field Management
3.1 Timely watering after sowing, keeping the furrows moist, but the amount of water should not be too large, and cultivating in time to cultivator, and strive to emerge early. Post-emergence management takes place early and the yam is hurried before and after the autumnal equinox.
Every time you pour water, you should cultivate the furrows once, combine the wide ridges to cultivate the soil, and use the roots and leaves to grow. After the emergence, water is poured and the soil is kept moist. After October, the number of waterings can be reduced, and only a small amount of anti-frost can be poured before the frost.
3.2 The forced-fertilizer can be emerged after about 10 days of sowing. It should be top-dressed in time to promote the growth of shoots and leaves above the ground. After every Qimiao, 667m 2 of ammonium sulphate or 10kg of urea or 5kg of urea is recovered. The second time the topdressing is performed at a height of about 20cm, and 15kg of urea is applied per 667m2. If the stems and leaves are weak and the leaves are yellow, it should be appropriate. Increase the number and frequency of topdressing. But it must be carried out before October 10. Otherwise, the temperature in the later period is low, the plant growth is slow, the absorption is small, and the fertilizer can not fully exert its effect and the effect is not good.
3.3 Cultivation of cultivators and weeds The cultivation of autumn potatoes requires high temperature, high humidity, and high levels of weeds. Herbicides should be sprayed in time. Weeding and weeding should also be carried out as soon as possible, and the first cultivator can be deeper after emergence. When the seedling height is about 20 cm, the second cultivator is carried out, and the first cultivating is performed. During the flowering period, the second soil was used. When the soil was cultivated, the lower stems and leaves were not buried. The third soil cultivation was performed in late October to keep the tubers from frost.

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