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.
Household Oxygen Generator,Homecare Oxygen Concentrator,Household Oxygen Machine,Household Medical Devices Haloxylon Ammodendron Medical Equipment Co., Ltd. , https://www.halonursing.com
A New Way for Regeneration of Chinese Fir—Budding and Planting Seedlings
After the Chinese fir plantation is cut, it is often updated with seedlings or sprouts. The former has a slow growth period and high renewing costs. However, the material is good, and the growth is long-lasting and the stamina is sufficient. The latter can grow into a large material. The latter has a fast growth and a low regeneration cost. However, the material is poor and the growth is slow in the later period, and it is difficult to become a large timber. If you use the new method of sprouting and planting seedlings, you can combine both advantages and achieve low input and high output. The technical points are as follows: Harvesting requirements should be carried out at the age of 20 to 30 years of Chinese fir for the main cutting. In this age group, the cutting force is the most vigorous. During winter dormancy, logging is conducted. At this time, the root nutrients are sufficient, and the buds of the spring bud are robust. Cutting height is controlled at 3 to 5 centimeters, and requires that the section has a certain slope, the slope should be consistent with the slope of the woodland, in order to facilitate the removal of rain. After the main cutting of soil preparation site, digging holes should be made between the cuttings in time. The number of digging holes per acre plus the number of the main cutting piles should be between 200 and 240 points. The newly excavated planting holes must be evenly distributed. The holes should be filled with finely-crushed soil, and the surface of the holes should be shaped like a hammerhead. In the early spring of the following year, the seedlings were planted and seedlings were planted. Each seedling was planted with 2 plants. The seedling roots should be stretched, the seedlings should be straightened, the soil should be stepped on, and the soil should be cultivated. The young forest promotion update carries out two tendings in the year. From April to June, weeding in blocky loose soil was performed. In addition to selecting 1 to 2 roots on the remaining cutting piles, the rest were removed, and the soil was cut and piled. The seedlings were planted to support seedlings and growth of the sprouts was inhibited. In August-September, all weeds were loosed and the cuttings and seedlings were removed and sprouted. Each year from the second year, tending 1 to 2 times until the young forest is closed. After the forest has been replanted and the newly closed Chinese fir forest closed, it is generally necessary to conduct two thinning and tending. The first thinning should be carried out 8 to 10 years after the renewal. After the thinning, 170 to 210 trees are to be kept per acre. The second thinning is to be carried out 13 to 15 years after the renewal. After the thinning, 120 to 160 trees are planted per acre. During thinning, we must follow the principle of “go small and stay big, go bad and stay good, go tight and stay sparse, go to budding trees, and leave real trees.†And we must maintain even distribution of standing trees. Note: The renewal method of budding and planting seedlings is suitable for the renewal of Chinese fir plantation with good site conditions and standing tree growth. Poor site conditions, poor growth of standing forests of Chinese fir should not be updated by this method, can only be used to add seedlings planted seedlings or new trees with afforestation resistance to update.
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