The key issue in hawthorn seedling technology is the rapid layering of rootstock seeds. The fruit tree station in Luan County, Shanxi Province used the underground storage to accumulate the seeds of hawthorn to obtain good results. The method is: in early December, put the seed collected in the year into the container, pour hot water of about 80°C, soak it for 2-3 days, remove it, mix it with 3 times wet sand, and put it into storage apples. The soil in the cave dwellings will be flipped once every month or so to make the seeds feel even and wet. When the humidity is low, some water should be added in an appropriate amount so that the seeds will germinate after being accumulated for 2.5 to 3 months. In mid-March, the seeds were sown at the right time when the white tip was exposed. If there are cold currents after sowing, effective cold prevention measures must be taken. The reason why this method is effective is mainly because it takes full advantage of the better temperature and humidity conditions in the winter storage pits. In the winter, the temperature in the cellar is generally about 3 to 6°C, which is just the best temperature for the seed layering treatment, and the temperature is stable, the change is small, the humidity is also high and stable, and the sand mixture is used, and the air permeability is good. The beneficial physiological activity of hawthorn seed is conducive to early germination.
Household Oxygen Generator
Household Oxygen Generator is a type of machine for producing oxygen, its principle is to use air separation technology. First, the air is compressed at a high density and then the different condensation points of each component in the air are used to separate the gas and liquid at a certain temperature, and then rectify it to separate it into oxygen and nitrogen. In general, people are used to calling it an oxygen generator because it is mostly used to produce oxygen. Because oxygen and nitrogen are widely used, oxygen generators are also widely used in the national economy. Especially Homecare Oxygen Concentrator and Household Medical Devices for hospital and household.
The first countries in the world to produce oxygen generators were Germany and France. The German Linde Company made the world's 10th m3/s oxygen generator in 1903. Following Germany, the French Air Liquide Company also began to produce oxygen generators in 1910. Since 1903, the oxygen generator has a history of 100 years.
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