Technical Tips for Planting Potatoes in Winter Fields

First, choose a good field, timely sowing requires deep plowing layer, loose texture, fertility in the upper sandy loam soil, irrigation and drainage of rice fields, the former not for the tuber potato, radish and other tuber crops. At the same time, it is necessary to arrange the sowing period rationally, combining with the local climatic conditions, especially the appearance of the frosty period (usually around December 20). Therefore, we will deepen the paddy field immediately after the harvest of late rice and sow the seeds from late November to early December. . Among them, sowing from November 25th to December 5th is the best time of the year, because it can avoid the whole seedlings in the frost period, make full use of the relatively high temperature before the frost, the long-term sprout, and the prolonged growth in the early stage of the frost. Period, increase production. The harvest begins in late March of the following year, and harvesting is completed before April 15th.
Second, the fine soil preparation, planting potato planting most afraid of water, but afraid of drought, should promote fine soil preparation, deep cultivation of sorghum, Putian when the lime per acre 25-50kg, from the cocoons, cocoon 70-80cm (1.2 m ditch, or 2.1m ditch (1.7m).
Third, select good varieties, reasonable and close planting of winter potato should be suitable for the entire early, medium-maturing varieties, such as Kexin No. 4, Cooperative 88, Atlantic, Zhongshu No. 3, purple and other new varieties, in order to increase production, the best choice for virus-free Seed potatoes were planted in double lines or sorghum sorghum with a row spacing of 2530 , and 4440 —5400 cultivars (2.1 畦 0.35 row spacing of 0.25 plant spacings).
Fourth, the whole potato or potato sowing, see seed germination buy back seed potatoes if not germinate, to dry potatoes for 2-3 days or remove the bad potatoes, with "9 O" 0.15-1.1% or 0.1-0.2% permanganate Potassium solution was immersed in potatoes for 10-15 minutes and then germinated in wet sand in a cool place. After 6 days of sorting, the germinating seed potatoes were detected. The germination of the germinating seeds was continued without germination. The germination was carried out by pushing the potatoes to dry to prevent seed picking. Cut the potatoes three to three days before planting. Cut them to 20-25 g/plant. Separate the buds from the ungerminated ones. Cut the ash and mix it with carbendazim, or rinse with water. Use 600-700 times of carbendazim after dripping. Or thiophanate-methyl chloride 700 times soaked for 15 minutes to pick up and spread for more than 1 day, is conducive to incision disinfection and healing to prevent bad species. Unsprouted cut tubers should continue to germinate, a layer of sand and a layer of potatoes, a total of 3-4 layers, keep moist, turn 6-7 days, check out the buds of the potato (see bud head), the color can be changed after the bud Sowing, such as sowing of potatoes after germination can be sowed more than 1 day. Pay special attention to the process of cutting the potatoes, we must first cut the good potato species, and then cut the rotten "head" of the potato, rotten head and potatoes first cut the rotten part, after the cut part; in the disinfection, first disinfect the seed paste after sterilization "Rotten" potato block.
5. Apply basal fertilizer as early as top-dressing organic fertilizer per acre 500-1000? + superphosphate 25? + potassium sulfate compound fertilizer 15?, Shi Yu deep row ditch mix, seeding with fresh padding seed potato to avoid Contact with potato chips to prevent bad seeds, cover species 3-4?; After emergence of seedlings, apply 5 urea water per acre; in the seedling height above 10? or 6-7 leaves, apply urea 10 per acre, Potassium fertilizer 40?, combined with cultivator soil. Organic fertilizer, calcium superphosphate 25?, potassium sulfate compound fertilizer 15?, urea 8-10?, potassium fertilizer 20?, boron fertilizer 1?, potassium fertilizer 1?, zinc fertilizer 1?, copper fertilizer 0.5? Shi Tianzhong, and then from scratch, the remaining part is used for top dressing. Or organic fertilizer, calcium superphosphate 25?, Xifeng compound fertilizer 50?, urea 5?, Potassium 20? And, boron, zinc, copper mixture after the spread from the wolfberry, open deep trench planting, remaining urea 5? In leaching and potash 20 cultivating. If the seedling grows too long, it can be controlled by paclobutrazol, which prevents the growth of potatoes. In the late stage, the top dressing may be applied 1-3 times to prevent premature decline and increase yield.
VI. Water Management Keep the soil moist after sowing, so as to facilitate seedlings, prevent rain and water in the fields, and reduce the amount of water in the fields.
Seven, pay attention to the prevention and treatment of diseases and weeds with mancozeb and thiophanate-methyl. Insect pests such as dimethoate, imidacloprid, and imele can be used. Underground insects can use phoxim and trichlorfon. (The herbicide can be sprayed when the soil is still wet on the second day after sowing, 200 grams of water per acre is used to spray 60 grams of water to spray the soil surface)
8. Harvest the vines one week before the harvest and cut vines three days before harvest to facilitate keratinization or storage of nutrients.

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