Experience of High yield of Potato in Autumn

Mr. Zhang Zhaohu of Jinghe subdistrict office in Tengzhou, Shandong Province, achieved a high yield of 1500 kg / mu in autumn this year. His experience is as follows.

Seed potatoes he planted a season of spring potatoes with virus-free Dutch No. 5 potatoes imported from the northeast this spring and harvested them in early June. The small potatoes with exuberant growth and no symptoms of virus infection were selected and used as seeds. In order to prevent disease infection, seed potatoes are not cut into pieces and mechanical damage is avoided as far as possible. In order to promote the rapid germination of potato seeds, gibberellin glycerol (also known as GG solution) was used to promote germination 12 days before sowing. The gibberellin concentration is 50-100 × 10-6. When 1000 × 10-6 gibberellin solution was used, the ratio of water to glycerol used for diluting the original solution was 4:1. In order to disinfect the pathogen on the surface of seed potato, 600 times of Dysen zinc fungicide was added. Soak the seed potatoes for 15 minutes and pile them up in a ventilated and cool place. Each pile of seed potatoes is about 30kg. Cover the pile with moist fine soil, and then cover with grass to preserve soil moisture. 7-10 days later, when the bud is 2-3 cm long, you can pick up the potato pile and pick up the seed potato, so that the bud can see the light and green exercise for 1-2 days before sowing. If the bud is not old enough, continue to accumulate and accelerate the bud. The bud length is more than 2 cm, and the bud length less than 1 cm will affect the yield.

Second, sowing seeds in the first ten days of August. Before sowing, the cultivated land first loosens the soil with rotary ploughing, and then sprays soil conditioner without deep ploughing of 200 g / mu, which promotes the loosening and permeability of soil with a depth of 30-50 cm, which is beneficial to the expansion of potato lumps and deep root system in the future, and enhance the absorptive capacity. The planting density is higher than that of spring planting. The row spacing is 60 cm, the plant spacing is 20 cm, the number of stems is 9000-10000 naked, keeping 5000 plants per mu. Before sowing, 100 kg / mu of commercial organic fertilizer and 100 kg / mu of potassium sulfate compound fertilizer were applied, a shallow trench of 3 cm was drawn according to row spacing, and seed fertilizer was applied to mix the fertilizer and soil. After sowing the seed potatoes, cover them with 14 cm thick soil to form a large ridge. Ridge farming has the advantages of irrigation in case of drought and drainage in case of waterlogging. After sowing, water immediately until the emergence of seedlings, in order to keep the ridge soil cool and moist. When it doesn't rain for a long time, watering also has a cooling effect.

Third, the growing period of autumn potato is shorter, the sunshine is longer and the temperature is higher before the end of September, which is beneficial to the growth of stems and leaves. In the later stage, the sunshine is short and the temperature is low, which is beneficial to the growth of tubers, and the stems and leaves are not easy to grow. Therefore, he took measures in management to promote growth as soon as possible. After emergence, there were two times of continuous topdressing before the group plant, with 10 kg of compound fertilizer per mu each time. Each watering, ploughing once, make the soil dry and wet, keep the ridge soil loose and ventilated. Combined with mid-ploughing to widen and thicken the ridge soil, the vertical section of the ridge is concave. This ridge shape makes the tuber in the soft soil layer, which is beneficial to the expansion. Before the end of September, the stems and leaves were promoted in time through frequent watering and topdressing. Spraying natural brassine Yishuofeng 481 to promote growth and development. During the tuber forming period, the temperature is getting lower and lower, and the soil evaporation decreases. As long as the ridge soil remains moist, the ridge and furrow are not dry and irrigated.

Fourth, harvest early November frost, only kill the top stems and leaves, do not rush to harvest. Harvest in mid-November.