After freezing damage to the potatoes, the soil is easy to compact and the humidity is high, and its root activity will be reduced. When carrying out field management, it is necessary to take advantage of the ploughing and loosening of the arable land, loosen the soil, remove the compaction, increase the soil temperature, and promote root growth. Qimiao should be followed by a second cultivating soil in time, combined with weeding; ridge height of about 10-15 cm, should be slightly shallow. It is necessary to pay close attention to the changes in the weather and take effective measures in time to clean the snow and reduce the risk of freezing. On the day before the frost occurs, half a gutter can be filled and the ridge surface can be wetted. Conditional growers can spray water to prevent frost when the frost comes. After the cold wave, it should be patrolled as soon as possible. It was found that the plants had frost, and they paid close attention to spraying the water before the defrosting in the morning. They not only cleaned the frost water but also narrowed the temperature difference and prevented physiological dehydration to reduce the frost damage. Fertilization should be carried out after the release of freezing damage and slow recovery of the plants. For emerging crops, combined with cultivating loose soil, timely heating of manure such as vegetation ash, cow dung, pig manure or compost will increase ground temperature and promote plant recovery; after temperature rises, urea 5-10 kg/sulphate per acre will be applied. 10-15 kilograms, 10-15 kilograms of phosphate fertilizer to promote plant growth; followed by foliar fertilizer, foliar spray 400-500 times containing amino acid foliar fertilizer or Urea 2-3 per mu, potassium dihydrogen phosphate 42 and brown sugar Five two watered 50 kg foliar spray. After the cold wave, the potato in the field is prone to verticillium wilt and blight. To select sunny weather, use 50% carbendazim WP 600-800 times and 3% KC 600-800 times to prevent rooting. Wilt and blight.
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