Squat seedling is a traditional crop management technology. In crop cultivation, the technical measures of inhibiting seedling stem and leaf length and promoting root system development. Its role is to "exercise" seedlings, promote plant growth and robustness, improve the ability of resistance to lodging and lodging in the later period, and coordinate vegetative and reproductive growth.
The length of squatting time also varies with the climate, soil moisture, fertility, and the type and appearance of the crop. If the squatting time is too long, it will inhibit the normal growth of the plant and affect the differentiation of reproductive organs; if the time is too short, the expected effect will not be achieved. For crops with short growth periods or inadequate soil moisture, poor fertility, and poor crop growth, it is advisable not to squat.
In production, many vegetable farmers take measures to squash seedlings after they have slowed down the seedlings. However, the author found that many vegetable farmers were unable to squat the seedlings. As a result, the vegetables often could not squat the seedlings or squatted too far. So, how to cultivate a strong vegetable plant by squatting a seedling reasonably?
To grasp the timing of squatting
In general, after slow-vegetating the vegetables, you should gradually open the vents, widen the temperature difference between day and night, and take measures such as controlling fertilizer and water, and spraying plant growth regulators to squatting. Squat seedlings can be carried out flexibly according to the growth of the plant, and the squatting seedlings are carried out at intervals. There is no special requirement for the length of each squatting time. The short time is one week, and the long time is half a month. Generally, the seedlings reach the thick stems and thick green leaves. Don't wait for the vegetables to grow before squatting. Many vegetable farmers often see that the vegetables are too long before they take measures to squat. This approach is very incorrect. For the emergence of excessively long shoots, chemical control is the most effective way.
Don't squat with flowers
Some vegetable seedlings have grown very large and have begun to flower when they are planted. For flowering vegetable seedlings, squatting is not recommended. Because the vegetable flowering period has very strict requirements on temperature, fertilizer and water, if it is changed blindly, it is not conducive to the normal flowering and fruit setting of the vegetable.
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Trolley Color Doppler Ultrasound Series
1. Imaging Modes:
· lB, B|B, 4B, B|M, M
· lColor Doppler (CFM)
· lPower Doppler (PDI)
· lDirectional Power Doppler (DPDI)
· lPulsed Wave Doppler (PWD)
· lB+PWD (Duplex)
· lB+CFM/PDI/DPDI+PWD (Triplex)
· lHigh Pulse Repetition Frequency (HPRF)
· ITissue Harmonic Imaging (THI)
2. Scanning Method: electronic linear, electronic convex, electronic micro-convex, scanning depth: 2-24cm
3. Color Doppler:
· lPRF variable: 0.5-9 kHz
· lwall filter settings: 3 steps (5%, %10%, 15% PRF)
· langle steering for linear transducers: ±10°
· lreal-time spatial filter: 4 values
· lCFM palette>10 maps
· lPDI palette>10 maps
· lB/Color priority control
· lcolor threshold control
· lCFM baseline control
· lDoppler frequency selection
· lcolor frame averaging
· lTransparent Color Mapping (TCM)
4. Pulsed Wave Doppler:
· lPRF variable: 1-10 kHz
· lwall filter settings: 16 steps (2.5%-20% PRF)
· langle steering for linear transducers: ±10°
· lreal-time trace line with automatic calculation of spectrum parameters
· lstereo sound: volume control
· lPWD palette>10 maps
· lDoppler frequency selection
5.Processing:
· lHigh Line Density scan mode for better resolution
· l8 sliders TGC Control
· ldynamic range>120 dB
· loverall gain control
· lM - mode sweep speed control
· lacoustic power control
· lvariable frame averaging
· lbrightness, contrast
· ladvanced gamma control
· lscan direction, rotation, up-down controls
· lnegative / positive control
· lecho enhancement control
· lnoise rejection function
· lspeckle reduction
6. Image and video: AVI, JPG, BMP, PNG, TIF, DCM (DICOM)
7. General Measurements and Calculations: Distance, Length, Area, Circumference, Volume, Angle, Stenosis %, A/B Ratio, Velocity, Pressure Gradient (PG), Acceleration, Resistivity Index (RI), Heart Rate, Velocity Time Integral (VTI), etc.
8. Measurements and Calculations Software Packages: Obstetrics, Gynecology, Abdominal, Urology, Endocrinology, Vascular, Cardiology, etc.
9. Expansion interfaces:
· lVGA, TV Interface
· lUSB2.0 Interface
· lRJ-45 Network interface
· lSupport DeskJet printer, LaserJet printer, video printer
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Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com