When the spring potato tubers reach 7-8 ° C at a depth of 10 cm, the shoots can grow; when they grow at 10-12 ° C, they grow and break out quickly. The potato has wide adaptability. Generally, the field is loose and easy to fill, and the field is 20-25 cm deep; the sorghum is 95 cm wide, the groove width is 25 cm, and the depth is 25 cm. Apply a fixed amount of base fertilizer before sowing, and combine the soil preparation to apply the fertilizer to the heart. 190-2000 kg of fermented organic fertilizer, 15 kg of ternary compound fertilizer, and 15 kg of potassium sulfate.
Spring potato should be selected from early-maturing or early-maturing disease-free and virus-free varieties. The potato variety is harvested 60-80 days after Qimiao, and the yield per mu is 1500-2000 kg. The size of the seed potato is preferably 50-100 grams.
Generally, it is planted in wide and narrow rows, with a large row spacing of 80 cm, a small row spacing of 35-45 cm, a hole spacing of 18-20 cm, a seeding depth of 7-9 cm, and a planting range of 5000-6000 plants. The soil must be kept moist during transplanting. It can be covered by single membrane or mulch film plus small arch film “double membraneâ€. The rate of large and medium potato can be increased by 10%-30%, and the yield is obviously increased, and it can be 10-20 days in the morning market.
It is generally not watered before emergence. After the soil is frozen, the soil should be ventilated in time. After the seedlings are chased and applied to promote the tree fertilizer, 5 kg of urea is applied to the water or poured with manure and manure. The germination period is combined with the cultivating shallow cultivating soil; the potato swelling period is combined with the clearing ditch and the cultivating large cultivating soil. In particular, the Fiorui variety must be covered with straw to prevent green head. At the same time, prevent water accumulation in the field, otherwise the tubers are perishable.
Spring potato has too much nitrogen fertilizer, which is prone to occur. In the bud stage, 15 grams of 15% paclobutrazol WP can be applied to 45 kg of water to control the upper part of the ground, which helps to make more potato chips.
The main disease of potato is late blight, which occurs when there is too much rain or before and after flowering. It is necessary to control pests and diseases early, and the spring potato can be harvested in the late spring before and after the beginning of May.
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