First, the election. The growth period of potatoes after tobacco is about July-December. During the whole growth period, a certain amount of water, fertilizer and light temperature are needed. For this reason, the altitude should be less than 1,400 meters. The sandy soil or sandy loam with red soil and medium fertility in poor soil cultivation should be planted better. .
Second, improved varieties. Good varieties should use high-yield, high-quality early and medium-duty detoxification varieties, such as cooperation 88, Lishu 6 and so on.
Third, fine soil preparation, adequate base fertilizer. Fine soil preparation and scientific fertilization are the key to create high yields of potatoes after tobacco. When the tobacco leaves are picked in the middle and upper parts of the field, they must remove loose grass weeds and residues in time and dig holes between the two sides of the smoke. The depth is 30cm. In the hole, 800 acres of high-quality farmyard manure, 30-40 kg of pre-calcium and 40 kg of compound fertilizer are used as base fertilizer.
Fourth, sowing. Generally, when the middle and upper parts of tobacco leaves are picked and harvested, the potato is planted. The planting is better from August 10 to August 20. Ensure that the potato completely blooms in October.
V. Cultivation techniques
1, germination and disinfection. Soak germination, break the dormancy, promote seedlings early unearthed, grow neat and robust, use 902 of the original drug 1 gram plus 50ml high sprinkling to fully dissolve, the water 100 kg soak the potatoes for 10-15 minutes, remove and dry Dry germination can be entered, until the buds grow 0.5-1 cm when you can sow.
2. Daejeon Management. 1 Seedlings can be seeded 15-20 days, and the missing seedlings must be checked in time to ensure that the seedlings are strong. 2 fertilizer and water management. When the height of potato seedlings reaches 15 cm, 10-15 kg of urea is used for the first time for topdressing, and timely watering after top dressing can promote the growth of the plants. When the potato enters the bud stage, it will be topdressed for the second time. The mu will be topdressed with 15-20 kg of urea. It will be used to deepen the soil to keep the soil moist and promote the rapid expansion of the tuber to achieve high yield. 3 Cultivated weeding. After the flue-cured tobacco was harvested, the tobacco plants in the field were promptly removed. The fast shovel and low spade were used to prevent damage to the potato plants. In combination with loose air in the cultivating soil, the soil moisture was maintained.
Six, prevention and control of pests and diseases.
1. Disease prevention and control. The main common diseases of potatoes after tobacco are late blight and bacterial wilt, and they can use 25% metalaxyl manganese zinc or 500-700 times antidote, which is 2-3 times of continuous high efficiency and low toxicity. Spray once every 7-10 days for prevention and treatment. It can also be used for scientific fertilization to reduce the humidity in the field and improve the disease resistance of plants to prevent the occurrence of potato diseases.
2, pest control. After the tobacco growth, the potato growth is gradually decreasing in temperature, mainly to prevent underground pests. The available chlorpyrifos is 2-3 kg/mu. When planting, it is fully mixed with the farmyard fertilizer or the phoxim EC at 1:500 times. During the period of fertilization, watering is applied.
Seven, harvest.
In the autumn, the cultivation time is short and mature. The quality of the product should be timely harvested. When it matures, it can be excavated or harvested before the onset of frost. It can be marketed in large, medium, or small grading packages or stored in ventilated areas.
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