Due to the irregular characteristics of the pelvic structure, the choice of internal fixation is diverse.
For patients separated symphysis pubis, a 2 or 4 holes, 4.5 or 3.5mm diameter dynamic compression plate or reconstruction plate can be used and fixed with full-thread cancellous bone screws.Another method of fixation is lag screw fixation. In patients with new sacroiliac joint dislocation with a forward approach,firm fixation can be achieved by using 2holes 3.5mm dynamic compression plates through the front of the sacroiliac joint. The posterior approach can also be used to insert 6.5mm lag screws into the sacral wings or hollow cancellous bone screws with interosseous compression for firm internal fixation. If available, the fracture may be fixed with 3.5mm or 4.5mm pelvic reconstruction plates and appropriate full-thread cancellous bone screws.
Pelvic Plate,pelvic fracture treatment,pelvic fracture,pelvis plate Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com
Non-pollution Production Technology of Three-membrane Watermelon
The selection of production bases ensures a favorable ecological environment with no pollution sources within 1500 meters. The soil has a medium texture, good drainage, and meets the standards for pollution-free watermelon cultivation. The farmland, soil, and irrigation water are all of high quality, ensuring safe and healthy growth conditions.
Soil preparation and one-time fertilization techniques involve winter plowing and applying 5–6 tons of high-quality, harmless organic fertilizer per 667 square meters. Before freezing, deep furrows are dug for high yield, and full-layer fertilization is applied to the watermelon ditches. This one-time method saves time and labor while improving product quality. Organic manure such as pig or sheep dung (4–5 tons per 667m²), decomposed chicken manure (1–2 tons), and cake fertilizer (soybean, peanut, or cotton) are used. After soaking, 0.2–0.5 tons of these materials are mixed with 40–50 kg of diammonium phosphate and 40–50 kg of compound fertilizer. The mixture is then combined with mature soil and filled into the top of the ditch. At the bottom, crop straw (wheat or corn) is layered with soil to enhance fertility. After filling, water is poured along the ditch, and the soil is loosened to warm it up and promote plant growth.
Watering techniques involve three key stages: planting, vine promotion, and fruit expansion. Watering should be done on cloudy days and avoided on sunny days. Proper ventilation is essential in greenhouses to control temperature and reduce anthrax incidence. Watering should be flexible, based on growth stages, soil moisture, and weather changes. Avoid flooding; instead, use morning watering to conserve water and prevent disease spread.
Cultivation management includes selecting strong, disease-resistant seedlings. High-quality seeds are treated with carbendazim or mancozeb before sowing. Seedlings are grown in greenhouses with controlled temperatures and humidity. A healthy seedling has thick hypocotyls, short internodes, and dark green leaves. Prior to planting watermelons, choose fields not previously used for melons to reduce soil-borne diseases.
Planting arrangements vary by season. Three-membrane watermelons are transplanted in mid-February and harvested in April, while two-membrane watermelons are planted in February and harvested in June. Spacing is 1.7m between rows and 0.5m between plants, totaling 900–1000 plants per 667 square meters.
Straw sheds and disease prevention involve covering with long-lasting plastic films to reduce humidity and improve air circulation. Bermuda grass is used to create raised beds, and mulch is applied to maintain warmth. Yellow sticky traps and mechanical weeding help control pests. Diseased plants are removed and destroyed to prevent disease spread.
Temperature and humidity management is crucial. After transplanting, small arches are closed to increase ground temperature. When temperatures exceed 35°C, shading is necessary. Gradual ventilation is introduced, maintaining daytime temperatures between 28–30°C and nighttime temperatures above 15°C. Once temperatures stabilize, greenhouse films are removed to reduce humidity and disease risk.
Plant management involves pruning vines to retain 1 main vine and 1–2 side vines, burying excess vines to improve light and airflow. Ash is applied before flowering to disinfect and provide potassium. Artificial pollination or bee introduction helps ensure fruit set. Each plant is left with one or two fruits, wrapped in paper bags to protect them from damage.
Chemical pesticides are used sparingly, following strict guidelines. Fungicides like thiophanate-methyl or chlorothalonil are applied every 6–7 days during outbreaks. No chemical use is allowed 20–25 days before harvest, and insecticides are stopped 10 days prior. Biological pesticides are preferred for safety and effectiveness.
Harvest occurs around 25–28 days after planting. Melons are picked with at least two fresh leaves, soaked briefly, and stored in shaded areas for 2–3 days to allow residue breakdown. After harvesting, earthworms are removed, and old vines are cleared to prevent disease transfer to the next crop.
The Mengsi Town watermelon project in Wenshang County has developed an 850-hectare pollution-free watermelon area. Average yields are 4000kg per 667 square meters for three-membrane watermelons and 3200kg for two-membrane varieties. With an output value of 8000–12,000 yuan per acre, this method significantly boosts income compared to traditional farming. Products are highly popular, in short supply, and exported to numerous cities across China.