1. Earthworms. In the winter, in combination with cultivators and clear trenches, earthworms are planted on the roots of the plants to obtain a relatively dry soil (tree height of 4060 cm), which will increase the depth of the root system, and reduce or avoid damage to the root system caused by cold and cold temperatures.
2. trunk white. Brush the white trunks and use the white light to reflect the light, reduce the temperature difference between the day and night of the tree, avoid frostbite. Whitening agent formula for whitening: lime 1.5 kg, salt 0.2 kg, sulfur powder 0.3 kg, a little grease (the role is to avoid rain), 5 kg of water, can be mixed into a paste solution.
3. Cover the bale. Straw straw, thatched straw, etc. are covered in the rows of herbal plants. Herbal seedlings should be covered with a layer of grass ash, and then protected by plastic film sheds. For seedlings of woody herbs, the entire tree can be bundled with rice straw or wheat straw, and the soil is compacted and pressed at the trunk near the ground.
4. Wet smoke. Wed grasses, leaves, sawdust, and husks are piled up in the upwind position of the medicinal field on a night of frost or early morning, and are lit. Generally, there should be 810 smoke stacks discharged per acre. Smoke stacks should be ignited when the outside temperature is 1°C2°C lower than the temperature of the crop victim, and the smoke should be stopped when the temperature rises above the crop damage temperature.
5. Reapply wax fertilizer. Before the soil is frozen, 1,5002,000 kilograms of soil miscellaneous fertilizer is applied between the rows of medicinal plants.
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