Timely buckle film cover grass cover
When the minimum temperature in the outside world drops to 15°C, the film should be snagged immediately. Planting greenhouses for cucumbers, tomatoes, eggplants, and other thermophilic vegetables is recommended to leave two vents underneath, that is, three membrane membranes to facilitate ventilation in the winter. Ventilation openings should be more than 20 cm, and they should be compacted with a firm laminating line to prevent the wind from scratching the film. When the minimum temperature in the room does not reach 15°C, take care of the cover or insulation. For overwintering tomatoes, cucumbers, eggplants and other thermophilic and hi-tropic crops, use a drip film or EVC membrane with good insulation and light transmission, with a thickness of 1 mm or more. Must use good insulation performance grasshoppers or insulation, the specific standards are: Grasshopper weight per square meter more than 3.5 kg, thick and even, from the inside to the outside can not see translucent; insulation weight per square meter is more than 1.5 kg, with water-proof.
Take multiple layers to cover
About 40 centimeters from the roof of the shed, iron wire is used as a bracket, and a non-woven fabric or agricultural film is covered on the bracket, which can effectively prevent heat loss in the shed and reduce cross-flow heat dissipation. Covering a layer of agricultural film outside grasshoppers can prevent wind and snow, and have a certain insulation effect. Planting greenhouses, such as tomatoes and cucumbers, in the greenhouse, covering double layers of grasshoppers can increase room temperature by 1°C~3°C.
Set up a cold ditch
Dig 30 cm wide and 50 cm deep cold protection trenches on the south side of the greenhouse and the outer sides of the east and west sides, and fill in straw or leaves. It is also possible to insulate 10 cm thick and 50 cm deep polystyrene board in the front of the booth to insulate against cold. Using this method can increase the room temperature from 3.6°C to 3.9°C in the winter.
Doing a good job of wall insulation
Before winter, the ventilation holes of the rear window and the east and west walls shall be sealed with straw or other insulation materials. The thickness of the back wall has a great influence on the insulation performance of the shed and the indoor temperature. It is recommended that a thin-walled shed be provided with a layer of 10 cm thick polystyrene board on the inside or a layer of 1 to 2 layers of old rakes on the outside.
Do the door insulation
Two curtains are installed at the entrance to the studio room and at the entrance to the room. It is best to open the two curtains in order to reduce the cold air brought in and out of the room. A 1.5m high and 3~5m wide wind-proof agricultural film is installed at the entrance of the shed, and the agricultural film shall be tightly adhered to the ground to block cold air from entering the shed.
Do well insulation on the south side of the greenhouse
The south foot of the shed is a place where cold air can easily enter the shed, and a 1-metre-high agricultural film is installed on the floor of the south side of the shed; the foot is affixed to the ground on the south side of the shed and covers a height of 1 meter at night. The old straw curtain or insulation can play a certain role in insulation and cold protection.
Apply reflective film
A 1.5 meter wide reflective film is suspended on the south side of the walkway in the shed to enhance indoor light intensity. It is best not to hang on the back wall. This will reduce the heat storage function of the wall, and affect the heat storage of the wall instead will reduce the temperature inside the night shed.
Taking emergency measures in extreme cold weather
In case of extreme cold weather in winter, temporary warming measures can be used to avoid or reduce the occurrence of frost damage. Such as the installation of Yuba light bulbs, installation of air heating lines, covering double grass rakes, temporary fire stoves, etc., to improve the room temperature and floor temperature, to ensure that crops from frost damage.
Improve plant cold resistance
Tomatoes, cucumbers, eggplants, zucchini and other crops can adopt the method of grafting seedlings on rootstocks to enhance their ability to resist cold. After the seedlings are planted, one day of low-temperature management is adopted, and on the other day, the method of high-temperature management utilizes alternate environmental changes of cold and heat to increase the resistance of the plants. A storage tank or reservoir is provided in the shed to raise the temperature of the irrigation water. When the water is poured, the amount of water should not be too large. The use of drip irrigation, micro-spraying, and other small-water pouring methods will help increase the temperature and save water. Watering should be done on a sunny morning and be careful not to water on a cloudy day. According to the soil nutrient content and plant growth to balance the fertilization, special attention should be paid to the application of phosphate fertilizer and potash fertilizer. Sparse fertilizer is applied at intervals of 10 days. The leaves are sprayed on the back of the leaves to spray phosphorus, potassium and boron, zinc, copper and other trace elements. Fertilizers such as alginic acid can also be used. Open and close ventilation openings in time to adjust temperature and humidity. Snow cleared the snow on the shed in time.
Lithium hexafluorophosphate is one of the most used electrolyte salt in the production of lithium ion batteries. Electrolyte Lithium Hexafluorophosphate for Lithium-ion Batteries has the ability of dissolving in binary and ternary solvents which cyclic carbonates and linear carbonates can be given as example. After lithium hexafluorophosphate dissolves in these solvents, it shows high electrolytic conductivity and thermal stability which is a desired property for lithium ion batteries.
The main use of LiPF6 is in commercial secondary batteries, an application that exploits its high solubility in non aqueous, polar solvents. Specifically, solutions of lithium hexafluorophosphate in carbonate blends of ethylene carbonate, dimethyl carbonate, diethyl carbonate and/or ethyl methyl carbonate, with a small amount of one or many additives such as fluoroethylene carbonate and vinylene carbonate, serve as state-of-the-art electrolytes in lithium-ion batteries.[6][7] This application also exploits the inertness of the hexafluorophosphate anion toward strong reducing agents, such as lithium metal.
Lithium Hexafluorophosphate,LiPF6,Hexafluoro-phosphate
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