In the severe winter season, the temperature is relatively low, and the cold-damaged crops in greenhouses often occur. Here are some ways to prevent freezing damage. First, increase the cover in the greenhouse around the night to add grass or corn stover, can increase the temperature 1 °C to 2 °C. Adding a thin layer of rake on top of the original grasshopper can increase the temperature of the shed by 2°C to 3°C. Covering the original grasshopper with a layer of film can not only block the wind, but also prevent the rain and snow from wetting the grasshopper, thereby reducing heat loss caused by evaporation of water. 2. Before the advent of cold smoke around the greenhouse, fire smoke around the greenhouse to prevent heat around the greenhouse from radiating to high altitude and reduce heat loss. 3. Regularly clean the shed film to remove dust, dirt, and snow on the shed film in a timely manner to increase the light and increase the temperature of the shed. Fourth, the cover film or small shed greenhouse is cultivated in high ridge, can be covered with a layer of film on the high ridge, generally can increase the ground temperature 2 °C to 3 °C; flat hoe cultivation, can be set up a small arch shed to improve ground temperature. V. Digging and protecting the ditch In the south of the greenhouse, dig trenches on the south side and fill in heat preservation materials such as horse dung, weeds, and straw to prevent the ground temperature from being dissipated and improve the ground temperature in the southern part of the greenhouse. 6. The double-layer film covers a film under the non-drip film. Since there is air between the two films, the temperature in the canopy can be significantly increased. 7. Use storage tank insulation to dig a tank every few meters in the center of the greenhouse. The bottom of the tank shall be covered with plastic film and then filled with clean water. Then, a transparent film shall be placed on the upper part of the tank (to prevent evaporation of water in the tank and increase air in the shed. humidity). Since the specific heat of water is large, it can absorb heat (at high temperatures) at noon and release heat at night. 8. In due course, when the temperature conditions permit, the grass cover will be uncovered as soon as possible to promote the photosynthesis of flowers. In the winter season, when sunny days flood the entire shed in the morning, the weather is generally not lower than 18°C. In cloudy or cloudy conditions, the light is weak, and grasshoppers should be uncovered in time to allow scattered light to enter. On the one hand, the temperature can be increased. On the other hand, there is more blue-violet light in scattered light, which is beneficial to photosynthesis. Avoid exposing grasshoppers for a long time, resulting in a cold inside the shed and a significant drop in temperature. Nine, increase the application of organic fertilizer in the shed to apply horse dung, broken grass and other brewing materials to increase the temperature. Decomposition of organic fertilizer can release heat. 10. Suspended light curtain A polyester aluminum film hanging from the north side of the greenhouse can increase lighting in the shed and increase the temperature of the shed by 2°C to 3°C. Eleventh, use the fire or the heating to meet the extremely cold weather, may add the stove in the shed or opens the heating. However, when using the fire heating, care should be taken to prevent flower gas poisoning (installing chimneys to export gas outside the shed). Take care not to warm the firewood in the shed to increase the temperature, because the smoke emitted from the firewood is harmful to the flowers. Twelve, the ground to spread the grass ash ash gray and black wood, with a strong ability to absorb heat, spread evenly on the ground, generally can increase the ground temperature 1 °C to 2 °C. XIII. Spraying antifreezing elements Before cooling, spraying the stems and leaves of the plants with antifreeze 400 to 700 times can play a role in freezing and freezing.
Visual Testing is the automated process of detecting and reviewing visual UI changes.Manually testing your app for across multiple browsers and devices is a tedious process, but you can accelerate it with automated visual testing that goes beyond pixel-by-pixel screenshot comparison.
In this webinar, you`ll see how you can easily avoid front-end bugs and visual regressions, as well as substantially increase coverage, by adding scalable automated visual testing to your existing Selenium and Appium tests running on the Sauce Labs cloud.
Visual Testing
Ketone Meter,Visual Testing,Ketone Test Kit,Ketone Strips FdaKetone Test,Urine Rapid Test Strips,Animal Test Strip,Test Strips Diabetes Weight Loss
Changchun Medicon Technology Development Co., Ltd , http://www.jlmdk.com