Fruit trees mainly rely on root hairs in the root system to absorb nutrients. Therefore, the fruit tree chase fertilization should be based on the edge of the crown projection or a little farther away, not too close to the trunk, because the trunk near the roots, fine roots and root hair less, is not conducive to the absorption of fertilizer.
Fruit tree chase fertilizer should master the following principles: deep root distribution of fruit trees should be properly deep, and vice versa shallow application; organic fertilizer decomposition is slow, but the fertilizer supply period is longer, can be deep, fertilizer mobility, can be shallow. If organic fertilizers are applied to deep-rooted fruit trees such as pears, the depth should be 40-60 cm, and organic fertilizers should be applied to shallow-rooted fruit trees such as plums. The depth should be 30-40 cm. It is best to spray new high fat film after fertilization to increase fertilizer efficiency.
For enclosed or closely planted orchards, it is possible to practice between rows and between plants, and it is best not to hurt or damage the roots. In this way, the fertilizer efficiency can be fully utilized, and the utilization rate of fertilizer can be increased to increase production and income.
SE-12B Digital Three Channel Color Touch Screen ECG Machine(electrocardiograph)
Features
- The system is designed with a high-resolution thermal printer featuring 8dot/mm
vertical resolution and 40dot/mm horizontal resolution(at 25mm/s) speed and filter as
well as related marks.
- Simultaneously 12 lead signal acquisitions.
- Digital filter to prevent baseline drift and automatic positioning of the baseline provide
accurate ECG trace.
- Able to detect and alarm on electrode disconnection.
- LED indicator and LCD display show operation status of the unit.
- Isolated input circuit guarantees safety standard in compliance to Class I type CF.
- AC/Rechargeable battery supports continuous operation when AC power supply is not
available. For the battery operation, the system is equipped with a battery charger and
a system for battery capacity management and protection.
- Compact size.
Specifications
Lead: Standard or Cabrera 12 leads,Simultaneously 12 leads acquisition
Sampling rate: 1000Hz(1ms)
Frequency Response: 0.05 ~ 150Hz
Time Constant: ≥3.2s
CMRR: >100dB
Input Circuit: <0.1 µA
Noise Level: ≤ 8 µVp∽p
Polarization Voltage: ±500mV
Sensitivity valve: 20 µV
Calibration Voltage: 1mV ±0%
Filter: AC: 50Hz-20dB(or 60Hz); EMG
filter:25-35-45Hz-3dB;
Drift filter: 0.5Hz -3dB
Sensitivity: 1.25, 2.5, 5, 10, 20mm/mV±2%,40 when format setted at 6ch or 3+3ch
Paper Speed: 5, 6.25, 10, 12.5, 25, 50mm/s ±3%
Recording MODE: Thermal array printer 8 dot/mm(Vertical) 40 dot/mm(Horizontal, 25mm/s)
Paper Size: 210mm20m or 216mm20m, thermal roll paper
Ecg Machine,Ecg Machine 12 Channel,Electrocardiograph Machine 6 Channel,Three Channel Ecg Machine
Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com