Winter vegetables attention cold
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1. Controlling nitrogen fertilizer: The seedling stage should appropriately reduce the amount of nitrogen fertilizer and avoid partial nitrogen fertilizer so as to avoid the growth of young plants and poor cold resistance. Top dressing is early, in order to promote vegetable seedlings. Before applying low-temperature nitrogen fertilizer, it is advisable to spray 0.2%-0.3% potassium dihydrogen phosphate 1-2 times. 2, increase the application of organic fertilizer: the use of sunny, with pig manure or compost and other warm fertilizer 100-150 kg, applied to the root of the vegetable locust, you can improve soil temperature 2-3 °C. 3, cultivator soil: combined with cultivator before freezing, the smashed soil cultured in the rhizosphere of vegetables, not only can loosen the soil, but also can directly protect the root system, but the cultivator depth of 7-10 cm is appropriate. 4. Appropriate fume smoke: pile up with weeds, straw, litter and other piles. Except the ignition point, the rest is lightly compacted with dry fine yellow mud. Before the onset of frost, a fuming smoke ignites at the ignition point of the top wind. If there is an open flame, seal it with fine soil. 5ã€Spray petroleum inhibitors: Select 3-4 days before the cold season to spray 30-40 times of oil on the plants, and form a layer of invisible cold film on the leaves, which will help reduce the transpiration of the leaves. To protect the body temperature of the vegetables and achieve cold resistance. 6. Pour manure water: Use 400-500 kg of thin manure water per acre before freezing, splash water to freeze, and reduce the cold. 7, winter irrigation: 1-2 days before the cold invasion, the weather is sunny and watered. After freezing, it is important to note that after the cold weather, the weather has indeed warmed up, the soil temperature has risen to 2-3°C, and the soil and vegetables have been thawed. Otherwise, freezing damage will be aggravated. Filling and pouring in winter irrigation, the field water can seep through the day. After the irrigation, seize the favorable opportunity to carry out loose soil insulation. 8, append grass ash: before the onset of low-temperature freezing injury, sprinkle a thin layer of husk ash or plant ash in vegetables, or in the vegetable rows between grass ash or fire and earth ash 50 kg, both cold and frost, but also increase fertilizer, but also on the cross Root rot of flowers family has better control effect. 9. Covering rice straw: In the afternoon before freezing, cover sparsely with rice straw or vegetables, and must not cover all vegetables to avoid affecting photosynthesis. 100 kilograms of rice straw, etc., are used for each mu.