In the early spring rice breeding season, low-temperature cold waves or prolonged rainfall often occur. If the water level in the paddy fields is not properly managed, the seedlings may become weak, their root absorption capacity could be damaged, and the balance between the upper and lower parts of the plant might be disrupted. Weakened seedlings are also more susceptible to pathogen invasion, which can lead to serious damage. To prevent these issues, the following measures are recommended:
Proper drainage and ventilation in the paddy fields are essential—not only for water permeability to support germination and emergence, but also for air circulation, allowing the seedlings to establish strong roots and grow healthily, thus effectively preventing rot. The process involves first preparing the field thoroughly, digging ditches, creating small mounds, applying sufficient base fertilizer, and breaking up the soil. Afterward, the field is soaked with water and leveled again.
When planning the sowing date, it's important to choose the right time based on the seedling age to avoid rot. Rice seeds typically require a temperature of at least 15°C for normal germination. Therefore, it's best to start planting when the open field temperature stabilizes around 12°C. If sowing is done too early, when temperatures are still low, the seedlings will grow slowly, so the seedling age should be increased accordingly. Conversely, if sowing is delayed and temperatures rise, seedlings will grow faster, so the age should be reduced.
The amount of seeds sown should be adjusted according to the seedling age and environmental conditions. It's important to sow evenly to ensure each seedling receives enough sunlight, air, and nutrients, promoting healthy growth. Overcrowding can reduce light exposure later on, affecting photosynthesis, reducing root development, and making the seedlings weak and prone to disease. Generally, for young seedlings under 20 days old, the seeding rate is about 180–200 kg per acre. For seedlings around 30 days old, the rate is usually 80–100 kg per acre.
Cultivating strong and healthy seedlings is fundamental for high rice yields and an essential step in preventing rot. Using wet cultivation methods can help produce seedlings of the appropriate age. During the early seedling stage, irrigation is usually limited to the tiantiangou (a small ditch), keeping the field surface moist without excessive watering. This helps the seeds take root quickly. During the rooting period, the water level should be carefully managed to protect against frost and sun exposure. Maintaining proper water levels while ensuring good ventilation is crucial for protecting the seedlings and promoting their healthy development.
Sterilization Container
The purpose of the sterilization box is to store the equipment in the process of packaging, sterilization, transfer, storage and so on. These orthopeadic instruments working mode is suitable for high pressure steam sterilization, not suitable for dry heat sterilization, ethylene oxide sterilization, ultraviolet sterilization, microwave sterilization and formaldehyde sterilization. The sterilization instrument box is divided into two parts,the cover and the body. The central area of the box cover is the filter system of the disinfection box, which is composed of quick filter system clasps and filter paper. The clasps need to be fixed by double keys, and the fixed sound can be heard during operation, which can effectively avoid the accidental loss of filter paper. Filter paper can be reused for 1 000 times, has chemical resistance, its chemical properties will not change with time, and its hardness exceeds steel. There is also a safety fit for the filtration system around the box cover, namely a silicone washer and a tension retaining ring. On both sides of the box there are handles, locks and sockets for indicating signs.
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