Autumn sweet potato high yield cultivation method

To seize the high yield of autumn sweet potato, the following six steps should be taken into account in the cultivation and management: First, cultivate strong seedlings. The high yield performance of sweet potato varieties and the quality of potato seedlings are internal factors that determine the yield. Therefore, we must do a good job in potato seedling raising, improve the quality of potato seedlings, and purify and rejuvenate the seed species in order to increase the yield of sweet potato. Second, seepage sand and soil. Sweet potato is a root crop that requires deep soil, loose soil, fertile, breathable, and refreshing soil conditions. Those who use the paddy field to plant the autumn potatoes need to seep and change the soil. Third, timely planting. Sweet potato is a warm crop, the optimal temperature for tuberous root formation is 24-25°C, and the optimum temperature for tuberous root enlargement is 22-24°C. According to the conditions for the requirement for sweet potato growth and the local climate characteristics, we must pay close attention to the season and plant it before and after the “big heat” so that the sweet potato can fully utilize the high-temperature and strong light conditions from July to August in the early stage, grow the stems and leaves in time, and early branch and early knot. Potatoes, more than potatoes. January was the month with the lowest temperature, which was unfavorable to the growth and development of sweet potatoes and even caused freezing injury. Therefore, we must grasp the appropriate period of early planting, for early potato, early expansion, and extend the effective expansion period of potato, in order to make the sweet potato high yield. Fourth, the level of shallow planting seedlings. The planting density and planting method of sweet potato also had a certain effect on the yield. It should not be too sparse or too dense. General Mu insert 3800-4000 strains, the use of sorghum ridge single plant, horizontal shallow method. Starting from the width of 90 cm (bag pits), trapezium 36 cm high, 17 cm spacing, shallow level of 2-3 cm. And we must cut the seedlings at noon on sunny days, planting them in the afternoon, and the output of sweet potatoes is high. Five, Qiao fertilizer water. Autumn potatoes should be based on the principle of “pre-light, mid-attack, and post-supply”, mainly organic fertilizer, supplemented by chemical fertilizers, and be diligently applied. When starting up, 50-100 kilograms of plant ash are used per mu, and they are spread on the bottom of the sacral heart; at the time of planting, 30 mus of clear water is used as the fixed root fertilizer. Honda has altogether 8 times in its total period. The total amount of fertilizer applied is equivalent to 24.6 kg of nitrogen, 16.5 kg of phosphorus, and 23.3 kg of potassium. The proper combination of nitrogen, phosphorus, and potassium can be achieved. Six, prevention and control of pests and diseases. Sweet potato scab can be sprayed with dexamethasone. The sweet potato larvae can be sprayed with 5% efficient cyanide 3500-4000 times liquid. Sweet potato weevil can be sprayed with dimethoprim. China Agricultural Network Editor

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