First, choose a good field, timely sowing. Choose paddy fields with deep plowing layer, loose texture, medium and high fertility, convenient drainage and irrigation, and at the same time, sowing dates should be rationally set. Double late rice should be sun-dried white immediately after harvest in mid-November, sowing in mid-December, and late March in the following year. Harvested until early April. Second, fine soil preparation, deep trenches. Winter potato in paddy field is most afraid of water accumulation. It is necessary to fine-tune the soil and cultivate the sorghum cultivation. Before the planting, the sorghum should be smashed and leveled, clean the rice piles, and open the deep trenches to build sorghum. The sorghum should be 35-40 cm high and 90-100 cm wide. 30-40 cm. Third, select good varieties, reasonable dense planting. Winter and early-maturing varieties of potato should be selected, such as Chunshu No.4, Zhongshu No.3, Kexin No.3, and Kexin No.2, and the best choice is to use virus-free seed potato, sowing in double rows, spacing 3030. In centimeters, a kind of potato is planted in each hole, and 3000-4000 holes are planted in acres. Fourth, the whole potato sowing, see germination. The disease-free whole sweet potato was selected, soaked for 15 minutes with 10 ppm gibberellic acid 15-20 days before sowing and then germinated in wet sand; or sprayed with 5 ppm gibberellin and 1% thiourea mixture Germination; Seeds can also be germinated under scattered light at room temperature of 15-18°C about 40 days before sowing, and rot, diseased potato and long-stem shoots can be removed at any time until the tuber buds are about 1 cm long. White roots can be sown. Fifth, pay attention to basal fertilizer and apply fertilizer early. In winter, fertilization should be based on basal fertilizer, supplemented by topdressing; early application of topdressing should be done with more manure and nitrogen fertilizer should be applied. The basal manure urine 1000 kilograms plus superphosphate 20 kilograms, potassium sulphate 15 kilograms, or 50 kilograms per mu with ternary compound fertilizer, can be planted under cover soil, and 1500 kilograms of soil miscellaneous fertilizer is used as cover seed fertilizer. Cover with 2 cm soil layer again. In the seedling stage, 1,000 kilograms of human excreta and 15 kg of urea are used per acre. 30 days after emergence, the second top dressing was applied and 1,000 kg of acquainted human excrement was applied. Sixth, timely cultivation, thick soil training. In the growing period of potato, weeding and weeding were carried out twice in time, the first time in the seedling stage, and the second time before the plant was ridged and covered with thick topsoil with topdressing, in order to reduce the deformed tubers and prevent late blight. Before winter frost, cover rice straw or straw 2-3 cm insulation and frost protection. Seven, scientific water pipes, pest control. In early droughts, irrigation should be performed in time, drainage should be paid attention in the later period, and the soil should be kept moist throughout the growing season. The main diseases of the potato should be controlled in time.
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