Potatoes in the open field in autumn: high-quality, high-resistance, short-lived, high-yield varieties, and detoxified potatoes harvested in spring, such as Mira, Hui-2, Feirui. These varieties are early maturing varieties with a growth period of about 90 days.
Seed potato processing autumn sowing potato seed potato is generally a whole piece of small potato as a good choice, using healthy high-quality small whole potato for germination sowing, germination is generally carried out on August 20 ~ 25; must be treated with chemicals after germination, that is, seed potato Soak seeds in 0.5% lime water solution or 5~10ppm gibberellin (9200) solution for 1~2 hours, then disinfect the potato pieces with 70% methyl thiophanate 500 times solution or mixed with ash, dry and germination; Up to about 1.5 cm, choose sunny morning or evening sowing.
Reasonable close planting is determined according to soil and fertility conditions, and soil fertility can be appropriately planted. The general planting density in Huize County is 5,500-6,500 plants per mu, and the planting amount is 160-180 kilograms. The narrow and narrow plants are good for soil cultivation. The row spacing is 40 centimeters, the pond spacing is 25 centimeters, the stem buds are facing downwards, and the cover soil layer is 5 centimeters thick. about. When the seedling height is about 15 cm, the soil permeability can be increased, and the temperature difference between day and night can be increased, which is favorable for high quality and high yield.
Strengthening the management of fertilizer and water combined with the short growth period of autumn potatoes, it is necessary to apply enough base fertilizer, generally about 1500 kg of farmyard manure, 45% potassium sulphate compound fertilizer or special compound fertilizer 100 kg, ditch strip application soil; secondly, strengthen drainage management Autumn potato plots must be able to discharge energy. Before emergence, after rain, it is necessary to drain the cockroaches in time to prevent rotten seedlings and high ridge cultivation for drainage.
After field planting 1 planting, due to continuous drought and high temperature, straw or wheat straw can be used to cover the surface, reduce soil temperature, timely irrigation and promote germination; in case of heavy rain, it should be drained in time to avoid rotten seeds. 2 After the emergence of the seedlings, 10~15 kg of urea is applied in combination with the cultivating soil, so as to promote the rapid growth of the seedlings; in the middle and late period, the potassium dihydrogen phosphate and the roots of the swells are sprayed 1~2 times; during the growth period, the soil moisture is timely and watered. Watering was stopped 7 days before harvest. 3 cultivating alfalfa cultivation. Qi Miao went to the buds and ploughed the soil 2 to 3 times before the closure. In addition to abandoning the weeds and breaking the knots, the soil was loose, creating good soil loose conditions, which was conducive to improving the rate of potato and the quality of potato tubers. 4 timely prevention of pests and diseases. The main disease of autumn potato is epidemic disease, which can be controlled by 1% Bordeaux mixture and agricultural streptomycin (according to the instructions for use); the pests are mainly underground pests and aphids, and the underground pests can be combined with the soil preparation with phoxim 200ml. The aphids can be sprayed with 40% omethoate EC 1000~2000 times in the occurrence period.
Harvesting autumn potatoes in general can be harvested from 65 to 90 days after sowing. It can also be harvested according to market demand. Under normal growth conditions, the leaves can be harvested when they turn yellow.
It can also be stored underground after harvest and sold on standby to increase economic income.
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