Black and White Ultrasound Scanner "Black and White Ultrasound Scanner" is to emit ultrasonic waves, so that the ultrasonic waves encounter barriers to generate echoes, use the computer to collect these echoes, convert them into corresponding images and display them on the screen, and the images measured by the ultrasonic probe are black and white, so it is called " Black and White Ultrasound Scanner" is also the earliest diagnostic technology adopted by b-ultrasound. Black And White Ultrasound Scanner,Animal Ultrasound Scanner,Palm Veterinary Ultrasound Machine,Animal Veterinary Ultrasound Machine Mianyang United Ultrasound Electronics Co., Ltd , https://www.uniultrasonic.com
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To ensure successful cultivation of protected peppers, it is essential to grow seedlings under film-covered conditions from the very beginning. This helps them gradually adapt to the environment after transplanting. If seedlings are grown in open fields, the sudden environmental change after planting can negatively affect their growth and increase the risk of disease. When using small or medium-sized greenhouses for seedling production, the width of the greenhouse should be wider than the area needed for the nursery beds. For example, if the bed is 1.5 meters wide, the greenhouse should be at least 2 meters wide.
Before sowing, seeds should undergo proper treatment to enhance germination and prevent diseases. One method involves soaking seeds in water for 6–8 hours, followed by a 5-minute dip in a 1% copper sulfate solution. After rinsing with clean water, this treatment effectively prevents anthracnose and scab. Another option is to pre-soak seeds in water for 4 hours, then place them in a 10% trisodium phosphate solution for 20–30 minutes, or immerse them in a 2% sodium hydroxide solution for 15 minutes. These treatments help inactivate viruses. Alternatively, dried seeds can be placed in a constant temperature oven at 70°C for 72 hours to eliminate pathogens and viruses.
Once the seeds have absorbed enough moisture, they should be kept in a dark, warm environment (25–30°C), turned every 4–5 hours, and washed once or twice daily. Germination usually occurs within 3–5 days.
When sowing, use 40–60 grams of seeds per square meter, which amounts to about 150 grams per 667 square meters. Water the seedbed thoroughly before sowing the sprouted seeds evenly. Cover the seeds with a mix of medicinal soil—8 grams of carbendazim per square meter mixed with 15 kg of fine soil—and cover with a 1 cm layer of soil. Then, place a plastic sheet on top to maintain moisture.
Seedling management is crucial during the early stages. After sowing, keep the daytime temperature between 25–28°C and nighttime temperature between 18–20°C, with a ground temperature of around 20°C. Seedlings typically emerge within 6–7 days. Once they appear, reduce the temperature to 22–25°C during the day and 15–18°C at night to promote strong cotyledon development and root growth. If temperatures drop below 15°C during the day or 5°C at night, growth may stop temporarily.
Maintain consistent moisture in the seedbed. If the soil becomes too dry, sprinkle damp soil over the surface. If it's extremely dry, mist the bed with water and then lightly dust with wood ash to absorb excess moisture. When the seedlings have 1–2 true leaves, they should be thinned out, ensuring no more than 3 true leaves remain, as four-leaf stage marks the start of flower bud differentiation.
In greenhouse settings, container-grown seedlings are commonly used. Two similar-sized seedlings can be planted in the same container, spaced 2 cm apart. A week after transplanting, maintain a daytime temperature of 25–30°C and a nighttime temperature of 18–20°C, with a ground temperature around 20°C to encourage root development. If the ground temperature drops below 16°C, root growth slows down, and below 13°C, it stops completely.
About 10–15 days before transplanting, begin hardening off the seedlings by gradually lowering the temperature. During the day, keep it at 15–20°C, and at night, 5–10°C. Water only when necessary, following a "see dry, see wet" approach to avoid overwatering. Proper management during this phase ensures stronger, healthier plants ready for field planting.