1, water and fertilizer management
Planting 3 days of watering once the seedling water, when the topsoil is wet and dry suitable, timely cultivating loose soil, for seedlings. Beware of green leaves, end of seedlings, combined with watering and fertilization, apply 10 kg of urea and 20 kg of potassium sulfate per mu, about 15? 20 days later when the plant height is about 25 cm, then topdressing 10 kg of urea per acre. After detaining the membrane, combine topdressing with 15 kg of urea and 10 kg of potassium sulfate per acre. Afterwards, the amount of irrigation is controlled as the temperature decreases. Stop watering and fertilize 10 days before harvesting.
2, temperature management
At the initial stage of colonization, the shade net was detained for 10 to 15 days, and the membrane was started in late October. Within 10 days after detaining the membrane, the bottom wind can be put in place to gradually adapt the celery. The shed film has been buckled during the planting, the front foot apron has been opened, the air outlet has been opened on the back wall or back slope, and the convective wind has been placed on the night and day. As the outside temperature drops, the rear tuyere is closed first, and the front foot continues to release air. When outside frost occurs, the apron is put down at night and the air is released during the day. During the daytime, the temperature in the shed is maintained at 15-20°C, during the night at 10-18°C, and at a minimum of 5-8°C. Even if it encounters even cloudy days, we must adhere to a short period of ventilation to reduce the humidity inside the greenhouse. When the night temperature is below 5°C, the air duct is closed at about the beginning of November. When outside 0°C, the shed is covered with grasshoppers to enhance insulation.
3, harvest
The harvesting time of celery is not very strict, and it can be determined according to the needs of the jaws or the market conditions. Jinghai County generally harvests before and after the Spring Festival. However, according to the requirements of the growth period of planting varieties, otherwise the yield and quality will be reduced. When harvesting, lay down the harvested grasshoppers and leave them 2 centimeters or so to shake off the soil.
Feature
Accurate pacing pulse recognition and automatic analysis
Manual, automatic, rhythm, and storage modes
Freezing function: 12 seconds electrocardiogram before and after freezing for back printing
Automatic mode: Review the electrocardiogram 10 seconds before printing, fast/save printing paper
Storage mode: Display parameters and diagnosis are not printed, and electrocardiogram is stored for playback.
AC/DC dual-purpose, built-in large container rechargeable lithium battery
Wide voltage can adapt to 75-265V,50/60Hz AC power supply
12 lead waveform display and 250 case storage (SD card is scalable )
USB and RS232 communication interfaces (ECGNET ECG management software can be selected)
USB host interface supports network transmission, external U disk and USB printer (optional)
High-accuracy thermal printing mechanism, supporting 210/215mm roll paper or 210mm folding paper
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