In areas where the annual minimum temperature exceeds -15°C, the grapes must be kept cold during the winter. Especially in the north of the Yellow River, the minimum temperature in winter is getting lower and lower, and the cultivated grapes must be kept cold. Cold protection is generally carried out in December. There are two methods for preventing cold. First, the hollow cold method in the colder northern part of the grape vines more than two years at 1.5 meters cut, bundled together, and then along the cultivation line to dig ditch, depth, width of 50 cm, buried branches along the ditch . Conditional wood poles can be used for scaffolding, covered with straw or other straw, cover the soil 30-50 cm above. Keep 50 cm away from the planting ditch when setting off to prevent root excavation. Second, the method of burying the cold is used in a relatively warm place. After the grapevine is cut, antegrade the ditch to a depth of 30-40 cm, then fill the vines into the ditch and bury it with soil. Remember: Grapes need to be cold early, and the ditch should be deepened. The earth should be wide and the coverage should be thick. Avoid taking the soil too close to the roots, so as not to cover the branches and expose the root groups. When the soil is buried, the soil must be dry, the block must be fine, and it must be buried carefully. Both of these methods must be irrigated once before the cold, in order to ensure the winter grape water requirements. Dig the ditch one day in advance and let it dry. Cover the vines in the ditch to prevent damage to the vines due to soil moisture. In the winter, it is necessary to check whether there is cracks in the soil. Fill the joints with dry soil in time to prevent ventilation. In the spring of the following year, it will be unearthed before and after the rain.
Most products of Fluorine-Containing Benzaldehyde are a pale yellow liquid. They are playing an important role in fine chemical intermediates, is used as the main raw material for the synthesis of a variety of pesticides, pharmaceuticals, surfactants, polymer monomer mildew. As used in medicine synthesis antihypertensive drugs, antipyretic analgesic anti-inflammatory drugs, anti-cancer drugs, muscle relaxation drugs for synthesizing fluorine cypermethrin, fluorine chlorobenzene daisy cool in pesticides, fluoride and styrene, wherein the polymer of styrene monomer to fluorine can be widely used in the manufacture of the recording material, a thermoplastic resin coating, liquid crystal materials. Currently new miticide is effective pesticide products which is the main raw material of Fluorine-Containing Benzaldehyde.
Fluorine-Containing Benzaldehyde
Containing Benzaldehyde,5-Dichlorobenzaldehyde,3-Bromo-5-Fluorobenzaldehyde
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