High mountain tea refers to tea produced in regions located at elevations of 600 meters or higher. These areas are known for their unique environmental conditions, which contribute to the superior quality of the tea. Takayama tea, for example, is becoming increasingly popular due to its natural purity, low or even absent pesticide residues, and rich flavor. Consumers often choose it as their preferred tea due to these qualities.
Tea originated from the Yunnan-Guizhou Plateau in China, where it developed specific characteristics such as a stimulating taste, moist environment, and diffused light. High-altitude regions share similar ecological features, with lush vegetation, high humidity, and frequent cloud cover. These conditions are ideal for tea plant growth. The soil in these areas is typically deep, fertile, and rich in organic matter, which supports the development of high-quality tea leaves. However, high mountain areas also present challenges, such as limited sunlight, poor heat conditions, short growing seasons, and vulnerability to frost. Excessive rainfall can lead to soil erosion, and cold nighttime temperatures may hinder the production of oolong tea.
Establishing a high-standard tea garden requires careful planning and attention to detail. First, the land must be carefully selected based on environmental conditions, including a suitable pH range (4.5–6.5), well-structured red or yellow soil, a slope of less than 25 degrees, and adequate water supply. Pollution-free tea production also demands testing of air, soil, and water quality. Second, the layout should focus on water and soil conservation, with proper drainage and irrigation systems in place. Shade trees should be strategically planted to create a balanced ecosystem. Third, topsoil should be returned to planting trenches, ensuring good mixing with base fertilizer. Finally, organic fertilizers should be used in sufficient quantities to promote healthy growth.
When planting tea trees, selecting high-quality seedlings and planting them during the dormant season is crucial. Seedlings should be handled carefully to avoid root damage, and any overly tall plants should be pruned before transplanting. Proper watering and protection against cold and drought are essential for successful establishment.
In autumn and winter, managing the tea garden involves covering young plants with green manure crops to improve cold resistance and increase organic matter. Spraying lime sulfur solution helps reduce pests and diseases. Flowering tea trees should be sprayed with ethylene to reduce flower production. Monitoring weather changes and taking preventive measures against frost is also important.
Fertilization plays a key role in maintaining tea garden health. Young plants require regular applications of organic manure and appropriate amounts of nitrogen-based fertilizers. For mature tea gardens, the amount and timing of fertilization depend on the yield and type of tea produced. A balanced approach using both organic and mineral fertilizers ensures optimal growth.
Pruning tea trees is essential for shaping the canopy and promoting healthy growth. Young trees undergo multiple cuts to develop a strong structure, while older trees are pruned to remove damaged or diseased branches. Regular pruning helps maintain productivity and quality.
Timely harvesting is critical for maximizing the quality of tea leaves. Picking should occur when a certain percentage of leaves reach the desired stage, following specific methods that vary by season. Closing the garden before the end of the tea season helps protect the plants from adverse weather.
Pollution-free tea refers to tea that meets strict safety standards, with no detectable pollutants or levels below permissible limits. This includes low-residue tea, green tea, and organic tea. Each type has its own certification process, ensuring that it is safe and environmentally friendly.
To produce pollution-free tea, strict land selection, quarantine of seedlings, and proper fertilization are necessary. Integrated pest management, including agricultural, biological, and chemical controls, is essential for maintaining healthy plants. Finally, processing and packaging must follow stringent hygiene and safety guidelines to ensure the final product meets all requirements.
Pelvic External Fixation
There are two kinds of external fixations for pelvic fractures, namely temporary fixation and therapeutic fixation.
Temporary fixation depends on on-site assistance. Assuming that the patient has serious open injury, severe hemorrhagic shock, and serious fracture dislocation, the rescue personnel will provide temporary external fixation support to maintain the stability of the pelvis, reduce secondary injuries, and correct the continuous aggravation of hemorrhagic loss on the scene. The therapeutic external fixation stent is used to correct the dislocation of the fracture through routine examination after admission, evaluation of the injury, and external fixation installation through treatment, maintain the relative stability of the fracture, create a very quiet environment for the fracture healing, and lay the foundation for the healing of the fracture. External fixation is an important method for pelvic fractures.
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