1, choose high-quality, high-yield, disease-resistant varieties. Zhongshu No. 3, Quanyin No. 1, and Zihua 851 were selected.
2, choose the right place. Choose early and middle rice fields with deep plowed layer, loose soil, sandy soil or loam soil, medium or more fertility, and convenient drainage and irrigation. After rice is harvested, it will be ploughed and tanned immediately, and fine soil preparation will be carried out.
3, timely sowing, rational close planting. The key to the success of the autumn potato is whether it can mature before the frost comes. According to the meteorological data analysis, the initial frost period in the normal year of Dehua County is in late November, and the whole growth period of the autumn potato is 70-80 days. To ensure the season, arrange the Planted in the last ten days of September, and the planting should be completed by September 15 at the latest. The dense planting specifications have a width of 1.1 meters and a deep trench is used to make sorghum, with 2 rows per plant, spacing of 30 cm, and 4,000 plantings per acre.
4, Shizujifei, apply fertilizer early. Potato is a high-potassium crop, with the largest demand for potash and followed by nitrogen fertilizer. Therefore, potassium fertilizer should be added to the cultivation. The growth period of the autumn potato is relatively short, and the base fertilizer should be applied enough to apply the top dressing early, and promote the early growth of the potato to achieve stable and high yield. The amount of basal fertilizer is generally 2,000 pounds per mu, and 100 pounds of imported potassium sulfate compound fertilizer. It is applied to the bottom of the hole and only 2 cm after covering the soil. The seed is 3,000 jin with fire soil or earth miscellaneous fertilizer. The first topdressing was carried out after the emergence of seedlings, with 2000 pounds of urine per acre, plus 10 pounds of urea. The second top dressing was combined with cultivator weeding 20 days after emergence, and 2000 pounds of livestock manure plus potassium sulphate per mu was compounded. Fertilizer 30 pounds applied to the side of the cave, combined with Qinggou Gaopu soil.
5, scientific management of water. After sowing, we must keep the soil moist. In the event of winter drought and dry rain, the ditch should often be drenched with ditch water, which is conducive to the rapid expansion of Qimiao and tubers.
6, strengthen pest control, timely harvest. Major potato diseases include early blight, late blight and bacterial wilt. Autumn potatoes generally have a lighter incidence, and prevention is the main method of prevention. During the middle and late stages of potato growth, it is often necessary to go deep into the field. Once a disease is discovered, it should be prevented and controlled in time. In particular, after the rain, sunny days and flowering buds should be strengthened. Bacterial wilt can be prevented by mancozeb spray. If a diseased plant is found in the field, it should be removed immediately and soil should be disinfected with lime to prevent spread. Early blight and late blight disease can be controlled by alternating sprays of extinction grams, Kelu, Jinlei Duomi manganese zinc. Autumn potatoes should be timely harvested before the onset of frost, to prevent frozen potato block, affect the quality, harvest should be selected sunny.
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