Mr. Zhang Chaohu, Jinghe Sub-district office in Tengzhou, Shandong Province, won a high yield of 1500 kg/mu this autumn. His experience is as follows.
First, Seed Potatoes This spring he used a virus-free Dutch potato from the northeast of the Netherlands to plant a spring potato for the first half of June. From this, small potatoes growing vigorously and no virus-infected plants were selected, and whole potatoes were used for planting. In order to prevent disease infection, seed potatoes are not cut into pieces, so as to avoid mechanical damage. In order to promote the rapid germination of potato species, 12 days before sowing, germination was performed with gibberellin glycerol (also known as GG solution). The gibberellin concentration is 50-10010-6. When formulated with 100010-6 gibberellic acid stocks, the ratio of water to glycerol used for dilution stocks is 4:1. In order to disinfect the pathogenic bacteria on the surface of seed potatoes, 600 times more zein zinc fungicide was added. Soak the seed potatoes for 15 minutes, remove them and store them in a cool, sheltered and sheltered place, about 30 kilograms each. The pile was covered with moist fine soil and covered with a grass rake. After 7-10 days, when the buds are 2-3 cm long, they can open the potato heap and remove the seed potatoes, so that the buds can be sown after 1-2 days of light greening exercise. If the buds are not long enough, they will continue to accumulate germination. The length of the bud is better than 2 cm, and less than 1 cm affects the yield.
Second, sowing in early August. Before sowing, cultivate the soil with a rotary plow first, then spray the soil conditioner to avoid deep plowing 200g/mu, promote loose and transparent soil in a depth of 30-50cm, which is conducive to the future expansion of tubers and deep roots, enhance absorption. ability. Planting density is greater than in spring. Line spacing 60 cm, spacing 20 cm, 5000 per acre, bare stems 9000-10000. Before sowing, apply 100 kg/mu of organic fertilizer and 100 kg/mu of potassium sulfate compound fertilizer. Draw 3 to 1 cm shallow ditch by row spacing, apply the seed fertilizer, and mix the loam. After sowing the seed, cover the soil with a thickness of 14 centimeters and make it into a large ridge. The ridge crop can be irrigated under drought and drought, and it can be drained for its strength. Immediately after sowing, water the plant until no water can be cut off to keep the ridge soil cool and moist. When there is no rain during long periods of drought, watering also has a cooling effect.
Third, the field management autumn crop potato growth period is relatively short, before the end of September a longer sunshine, the higher temperature, is conducive to the growth of stems and leaves. The late days are short and the temperature is low, which is conducive to the growth of tubers. The stems and leaves are not easy to grow. Therefore, he took measures to promote hair growth as early as possible. After the emergence of the seedlings, the top dressing was continuously applied 2 times, each time 10 kg of compound fertilizer was applied per mu. Each pouring a water, cultivating once, so that the soil see dry see wet, keep the ridge loose soil permeability. In combination with the cultivator, the width of the ridge is increased and the ridge is thickened so that the longitudinal section of the ridge is concave. This ridge shape makes tubers in tubers in the soft soil layer, which is conducive to enlargement. Before the end of September, the stems and leaves were promptly promoted by diligent watering and topdressing. Spraying a natural oyster extract, a large 481, to promote growth and development. During the potato stage, the temperature is getting lower and the amount of soil evaporation is reduced. As long as the ridge soil is kept moist, the furrows will not dry out.
Fourth, harvest early frost in early November, only kill the top stems and leaves, do not have to rush to harvest. Harvested in mid-November.
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