Abnormal growth of watermelon seedlings and its coping methods: æ²¤æ ¹â—In the case of continuous rainy days, low seedbed temperature and high bed soil moisture, the roots of the seedlings stop growing, the main roots and lateral roots become rust-colored, and when the roots are decayed, the roots of the roots do not develop new roots. Yellow, heavy seedlings are wilting. Rooting â—In the case of applying unfertilized organic fertilizer or excessive amount of chemical fertilizer, the soil in the seedbed is dry, the roots are yellow, no new roots are formed, the growth on the ground is slow, and the plants are short and brittle, forming small old seedlings. Yellow seedlings weak seedlings â— Mainly due to long-term low temperature and low temperature, high humidity, low nutrient level, and weak seedlings form yellow seedlings. Seedlings from the top of the seedlings do not grow long, only two cotyledons or one or two true leaves without topping seedlings, commonly known as self-sealing. The main reasons are: â— The concentration of the drug used in the nursery period is too large, causing phytotoxicity at the growth point. â— After the seedlings are unearthed, they suffer from certain pests and cause self-sealing seedlings. â— During the seedling period, the temperature of the seedbed is too low, or the growth point of some seedlings condenses the cold water droplets, causing freezing damage at the growth point. Overcome measures 1 When the first true leaves of 90% of the plants are displayed, raise the temperature of the seedbed to 25~27 °C. If the temperature is lower than 16 °C, use light or electric heating line to warm up. After the expansion of the 2 leaves, the water requirement of the watermelon seedlings increased significantly, and the water should be replenished according to the humidity of the bed soil to keep the bed soil moist. 3 In the early spring, there are many rainy and cold weather in the nursery period. After the temperature rises, it should be ventilated in time. At the same time, try to increase the time of receiving light and prevent the seedlings from growing into weak seedlings. When the roots occur, stop spraying immediately, and sprinkle some fine dry soil or coal ash, grass ash, etc. on the surface of the bed to make the bed soil temperature rise as soon as possible. It was found that water was sprayed in time to burn the roots, and the humidity of the bed soil was increased. The water spray was stopped 5 to 7 days before the planting, and the seedlings were sprayed. For the lack of nutrient yellow seedlings in the nursery soil, 0.2% high-purity potassium dihydrogen phosphate (phosphorus potassium source pool) can be sprayed on the noon on sunny days. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Specifications:
Gain: 30-105 dB
SAB-200 A/B Scan with normal, vitreous body enhancement, retina observation mode, mainly used for diagnosis of intraocular diseases, display the location, shape range of the focus of infection and the relationship with the surrounding tissue. Can be diagnosed vitreous opacity, retinal detachment, eye base tumors etc. eye diseases. A scan is used to measure anterior chamber depth, lens thickness, axial length, calculate diopter of implant IOL as well.
B scan:
A scan:
Ubm Ultrasound Machine For Eyes,Ultrasound Biomicroscopy Microscope,Ultrasound Biomicroscopy And Pachymetry,Ultrasound Biomicroscopy System Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com
High Resolution Image
Liner Scanning Method
100% Bandwidth with Short-Pulse Technology
Safe in Operations
No Abrasion of Cornea
No Cross Infection
Convenient
More Probe Shells Offered
Easy to Exchange Probe Shell
Adjustable Focus by Probe Shell
Transducer: 35MHz/50MHz
Scan: Linear scan
Scanning Range: 16mm*10mm 35MHz
10mm*6.5mm 50MHz
Image pixel: 1024*655
Resolution: axial≤0.05mm, lateral≤ 0.1mm
Frequency: 10MHz/20MHz (optional) ,Magnetic driven, noiseless
Scanning Mode: Sector Scanning
Magnify:Multi continuous magnification,Real-Time magnification
Resolution: Lateral ≤0.3mm;Vertical≤0.2mm
Geometry position precision: Lateral ≤10%;Vertical≤5%
Depth:60mm
Enhance the part of vitreous body and retina
Gain of probe:30dB-105dB
Scanning Angle:53°
Gray Scale: 256
False Color: Multi colors. OCT
measurement type: multigroup distances, perimeters and areas
Image postprocessing: multiple curves processing, Pseudo-color processing curve
Movies: 100 images movie review, AVI JPG format image output
Frequency:10MHz, with LED
Depth: 40mm
Precision:±0.05 mm
Measurement: Anterior chamber depth, lens thickness, vitreous body length, total length and average
Eye mode: Phakic / Aphakic / Dense / Various IOL
IOL Formula: SRK-II, SRK-T, HOFFER-Q, HOLLADAY,BINKHORST-II, HAIGIS
Stat. Calculation: Average and standard deviation
Store: 10 Scanning results for each eye
Others:
Display Mode :B.B+B.B+A.A
Hint: preset keyword
Case Search:Multi-keywords
Working Platform: Windows XP.VISTA.WINDOWS7
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