Flue-cured tobacco sweet potato money and grain double harvest

The Baishui Village, Xiaotang Town, Xinshao County, Hunan Province, was planted with sweet potatoes in a tobacco field. Interplanting sweet potatoes and flue-cured tobacco for 15 to 20 days was a commensal period, and 20 to 25 days later than the introduction of tobacco to insert potatoes, which greatly extended the sweet potato During the growth period, the root swelling is in a more suitable temperature and light conditions. Until the drought in autumn, sweet potato seedlings have been covered with noodles, which can play a role in drought resistance. Generally, the output value of flue-cured tobacco is 1,500 to 2,000 yuan, and the yield of sweet potato is 3.5 to 4.0 tons, which increases the production of sweet potato by more than 500 kilograms compared with the increase of tobacco after the harvest. Interplanting also eliminates the need for plowing, hoeing, and other processes to reduce labor costs.

Potato seedling cuttings. Seedlings of good seedlings were used and cut in late May to early June. Among the flue-cured tobacco plants (line spacing of 1.1 m 0.50-0.55 m), sweet potato was interplanted at a plant spacing of 17-20 cm, that is, 3 plants were interplanted among the tobacco plants to ensure 3300-3600 plants per acre. Before the planting, use a steamed bun to loosen and use thick, disease-free pests and potato shoots. Before inserting the sweet potato, use the carbendazim 600-800 times solution and the biological potash fertilizer 150-200 times. Soak 8 to 10 Minutes to prevent disease, and is conducive to rooting sprouts.

Scientific fertilization. When the tobacco leaves are all harvested, use a knife to cut the smoke stems and leave the roots; after 25 days of sweet potato insertion, combine the cultivators and weeds for fertilization. Ditch the furrows 6 cm away from the alfalfa and apply the fertilizer to both sides of the alfalfa. , Then the soil is reclaimed, and the dosage is 750-1000 kg per mu of farmyard fertilizer, 75-100 kg of special fertilizer for sweet potato and 15-20 kg of potassium sulfate. Appropriately apply cracking fertilizers and extra-root fertilizers as appropriate.

Field management. Two days after the sweet potato was inserted, it was watered and kept alive; before the seedling stage was sealed, combined with fertilization and cultivating and weeding were carried out. Due to the long-term rain and rain on the people's feet, it is too early to settle down. Applying fertilizer to cultivators can greatly improve the condition of the nutrient conditions for the ventilation of the soil and promote the swelling of the roots. Before the potato vines are sealed (40 to 50 days after the planting), 200-250 mg/kg of paclobutrazol is sprayed on 50 kg of water to control the growth of the above-ground parts and promote the growth of underground parts. At the same time with 100 grams of borax per acre with liquid sprayed 2 or 3 times, is conducive to nutrient delivery to the underground part. Attention should also be paid to the control of pests such as communicable disease, black spot, small weevil, and Spodoptera litura.

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