First, choose the variety. The “Lu Yin No. 1†virus-free seed potato, which is insensitive to light, early maturity, high yield, and short resting period, should be selected. Second, seed treatment. Autumn sowing is better with whole potatoes (preferably not cut), and it is not easy to rot after sowing. The germination often uses the wet sand heap burying method, until the buds grow 2 to 3 centimeters. In order to speed up the release of seed potato dormancy, it can be soaked for 5 minutes with a 1 to 2 PPM gibberellin solution before germination. After treatment by this method, seed potato sprouts quickly and neatly. Third, the appropriate sowing. Autumn potatoes should be planted before and after "Early Autumn". Seeding is too early, the temperature is high at day and night, the seedlings are long and thin, and the seeding is too late. Because the growth period is limited by the frost period, the yield is reduced. Fourth, rational dense planting. Autumn is short of sunshine, plant trees are short, underground stems are short, and potato is concentrated. Therefore, the density should be increased reasonably, which is generally 30% more than the spring sowing density. Fifth, the application of fertilizer efficiency. Due to the short autumn sunshine and cool weather in autumn, it is suitable for the growth of tubers. The plants are early and not easy to grow, and due to the short growing period of autumn potatoes, the available fertilizers should be used as base fertilizer and top dressing in management, so as to promote early planting of potato. . Six, timely watering. After sowing of autumn potatoes, when the temperature is high and the soil is dry, it should be watered in time to promote its early emergence, and keep the soil moist throughout the growth period to facilitate plant growth. Seven, cultivator soil. Timely cultivating soil in the cultivator will help reduce soil temperature, prevent drought, and promote the occurrence of stolons in the early stage; it is beneficial to tuber hypertrophy and tuber freezing injury in the later period. Eight, outside the top dressing. Potato tuber enlargement period has higher requirements for fertilizer and water, and root absorption alone can not meet the needs of plants. 0.5% urea and 0.3% potassium dihydrogen phosphate can be used for foliar spraying to make up for insufficient root nutrient absorption. , increase the output of autumn potatoes. Nine, pest control. The major pests and diseases of autumn potatoes include viral diseases, late blight, cockroaches, aphids, and potato ladybugs. Control methods: Virus disease can be controlled by spraying 1.5% of Lingzhi 1000 times solution or virus A wettable powder 500 times in the early stage of disease; spraying 64% of anti-virus WP can be used in late stage of disease. Spray control; earthworms can be irrigated with 50% phoxim 1000 times in the occurrence period; aphids can be sprayed with 40% omethoate EC at 1500 times in the occurrence period; 50% killer pine can be used for potato ladybugs. Floating oil 1500 times spray control. Ten, appropriate harvest. In order to prolong the growth period of autumn potatoes and accumulate more nutrients, the harvest should be delayed as long as it is free from frost damage.
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