High-yield cultivation techniques of Potato after Tobacco

First, choose the place. The growing period of post-tobacco potato is about July to December, and a certain amount of water, fertilizer, light and temperature are needed during the whole growth period. therefore, it is better to choose sandy loam or red loam soil with loose soil and tobacco land with medium fertility below 1400 meters above sea level.

Second, improved varieties. Early and middle ripening virus-free varieties with high yield and high quality should be selected, such as Hezuo 88, Litu 6 and so on.

Third, fine soil preparation and adequate application of basic fertilizer. Fine soil preparation and scientific fertilization are the key to creating high yield of post-tobacco potato. When tobacco leaves are harvested in the middle and upper parts of the field, soil should be loosened in time to remove soil moisture weeds and residues, planting holes should be dug between the two sides of tobacco, and 30cm holes should be deep. 800 kg of high quality farm manure, 40 kg of common calcium and 40 kg of compound fertilizer should be used as base fertilizer.

Fourth, sow seeds. Generally, interplanting potatoes began when tobacco leaves were harvested in the middle and upper parts, and it was better to plant them from August 10 to August 20. Make sure the potatoes fully blossom in October.

5. Cultivation techniques

1. Accelerating germination and disinfection. Soak seeds to accelerate germination, break dormancy, promote seedlings to be unearthed early, grow neatly and healthily, choose 920 raw medicine 1 gram plus 50ml high sprinkling essence to fully dissolve, soak the potato seeds in 100kg water for 10 minutes, then fish out, dry them, and sow seeds when the buds are 0.5-1cm long.

2. Field management. ① potato can emerge in 20 days after sowing. Check the deficiency and make up the seedlings in time to ensure that the seedlings are strong. ② fertilizer and water management. When the height of potato seedlings reaches 15 cm, the first topdressing of 15 kg urea per mu can promote the growth of plants. When the potato entered the early budding stage, the second topdressing was carried out, and urea was applied with 15ml / mu. Deep application was used to keep the soil moist and promote the rapid expansion and growth of tubers so as to obtain high yield. ③ ploughing and weeding. After the harvest of flue-cured tobacco, the tobacco plants in the field were cleared in time, and the potato plants were not hurt by fast hoe and low shovel, and the soil moisture was maintained by loosening and aerating in the middle ploughing.

Sixth, prevention and control of diseases and insect pests.

1. Disease control. The common main diseases of potato after tobacco are late blight and bacterial wilt. You can use 25% metalaxyl manganese zinc or 500 MUBG 700 times liquid spray for 3 times in a row and spray once every 7 mi 10 days for control. It can also reduce the humidity in the field, improve the disease resistance of plants and prevent the occurrence of potato diseases through scientific fertilization.

2. Pest control. The growth of potato after tobacco is positive when the temperature decreases gradually, mainly to prevent underground pests. Chlorpyrifos 2kg / mu can be fully mixed with farm fertilizer when sowing or 500 times of phoxim EC can be mixed with water during seedling stage.

7. Harvest.

The cultivation time in autumn is short and mature early, so it should be harvested in time to improve the product quality. when it is ripe, it can be excavated or finished before frost, and listed in large, medium and small packaging or stored in a ventilated place.