Potato planting in winter field
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November 18 19:01:04, 2018
First, choose a good field, timely sowing. Select double-cropping rice areas with an altitude of less than 1,000 meters, less frost or no frost in winter, and an average annual temperature of 19 degrees Celsius or above, requiring deep plowing, loose texture, superior fertility, and convenient irrigation of rice fields; Immediately in mid-November, the sun will be sunburned and sowed in mid-December, and harvested from late March to early April of the following year. Second, fine soil preparation, deep trenches. Winter potato in paddy field is most afraid of water accumulation. It should promote fine soil preparation, deep cultivation of sorghum cultivation, smashing and leveling before planting, clean up piles of rice, and open deep trenches to build sorghum, with 35 to 40 cm in height and 90 to 100 cm in width. Ditch depth 30 to 40 cm. Third, select good varieties, reasonable dense planting. Winter potato should use early and mid-maturing varieties. To increase yield, it is best to use virus-free seed potato, sowing in double rows, spacing 30 cm and 30 cm, broadcasting one potato per hole, and sowing 3000 to 4000 holes per mu. Fourth, the whole potato sowing, see germination. The disease-free whole sweet potato was soaked with 10 ppm gibberellic acid 15 to 20 days before sowing for 15 minutes and then germinated in wet sand; or sprayed with 5 ppm gibberellin and 1% thiourea mixture. It can also germinate under the scattered light of 15~18°C at room temperature about 40 days before sowing, and remove the rotten, diseased potato and long-sizing tubers at any time, until the tuber buds grow about 1cm, and the bud base appears white. Root 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 2 cm soil again. In the seedling stage, combined with seedlings, seedlings, weeding, weeding and weeding, the first topdressing is performed with 1,000 kg of human excreta and 15 kg of urea per mu. 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. During potato growing period, combined with top-dressing, timely cultivating, weeding and earth-cultivation were carried out twice, the first time in the seedling stage, and the second time in planting ridges combined with top-dressing, deep ditch and thick soil to reduce deformed tubers and prevent late blight. Before winter frost, it must cover rice straw or straw 2 ~ 3 cm insulation and antifreeze. Seven, scientific water pipes, pest control. In early drought, water should be promptly filled, and attention should be paid to drainage in the later period, and soil should be kept moist throughout the growing season. The main diseases of potatoes should be promptly controlled.