Rain will increase in June, pay attention to manage the vents
According to the weather forecast, there will be more rain in many parts of the country in June. For shed vegetables, the air vent is the main channel for rainwater to enter the shed. In production, rainwater enters the shed because the air vent is not closed in time, resulting in dead vegetables. Install rain film at the vent A layer of film is added to the inner side of the front face of the greenhouse, which has a good rainproof effect. The specific method is as follows: the width of this film is about 50 cm. If it is too wide to obstruct ventilation, the length is the same as the length of the front face of the shed. One end of this layer of film is covered with soil at the bottom of the front face of the shed, and is tightly attached to the lower end of the insect-proof net, and the other end is fixed to the column at the front face with a rope or wire. The film between the two columns is then covered with a rope or wire. Hang it to make this layer of film into a canal shape, and a "thin film barrier" with a height of ten centimeters is formed near the end of the column. Through this arrangement, when it rains, it can not only block part of the rainwater, but also catch part of the rainwater, preventing a large amount of rainwater from entering the shed. In addition, a rain-blocking film should also be installed under the vent on the top of the greenhouse. Even if rainwater enters the shed, it will flow with the film to the drain at the back wall of the shed. Install smart ventilation equipment to quickly close the vent In summer, sudden rains occur frequently and often, often within ten minutes or even within a few minutes. Even if vegetable farmers are working in the shed, they may not have time to close the air outlet, causing rainwater to enter the shed. Many smart ventilation devices currently on the market can quickly close the air outlet of the greenhouse. A shed invests several thousand yuan. When there is sudden rainfall, the air outlet can be closed in time through the remote control of the mobile phone. Conditional vegetable farmers can consider it. Dig a water storage ditch at the air outlet The trench that is dug does not need to be too deep, it can block or store the rainwater left from the shed film, and raise the trench wall close to the vegetables to prevent the rainwater in the trench from overflowing into the planting row after it is full. Water storage ditches can also be dug on both sides of the arch shed. This kind of water storage ditch is mainly for the rain with a long rainfall period and less rainfall. When the rainfall is heavy, the air outlet must be closed. It is also not necessary to dig trenches, and only trim the soil between the vegetables and the front face to make a slope with low south and high north. At the same time, laying old film on the slope can also achieve good results. This will not affect the ventilation, but also Let rainwater flow away to avoid rainwater entering the shed. In the event of rainwater entering the shed, the vegetable grower should promptly drain the accumulated water, and strip the soil around the base of the vegetable stem to accelerate the evaporation of water, and allow part of the root system to fully contact the air, and then re-cover the soil after 2-3 days. When the shed soil sees dry and wet, hoe in time. At the same time, rooting fertilizers such as amino acids, humic acid or chitin can be used. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
SPA-100 Ophthalmic A-Scan/Pachymeter with macular recognition function, can accurately measure axial length, anterior chamber depth, lens thickness, as well as intra-ocular lens calculation.
A scan probe: 10MHz import small size probe, built-in luminotron
P scan probe: 20MHZ, angle of 45 degrees makes easier operation
Others: A/P Ophthalmic Scanner,Eye Ultrasound Scanner A Probe,Ophthalmic With Pachymeter Ap Probe,A Ophthalmic Diseases Check Ultrasound Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com
And also with the central area and the peripheral areas gain automatic compensation capability, accurate measurement of central and peripheral corneal thickness, is widely used in the preoperative examination and postoperative effect evaluation of refractive surgery.
Measuring range: 15mm-40mm
Measurement precision: ±0. 05mm; with macula lutea trace function
Measurement: Anterior chamber depth, lens thickness, vitreous body length, total length and average
Method of measurement: immersion and contact
Eye mode: Phakic/ Aphakic/Dense/ various IOL
IOL formula:SRK-II.SRK-T.BINKHORST- â…¡.HOLLADAY.HOFFER-Q.
HAIGIS
Enter the name & ID; easy to check archive
Storage: 10 cases, 5 readings each case
Output: A scan waveform and IOL calculation sheet
Resolution: 5um
Measuring range: 150um~1500um
Display: SINGLE mode and MAP mode
Can display ultrasound waveform when measuring
Each group is the average of 20 measurements
Switch between IOP measured value and actual value
Can input name, ID and operator`s name
Large color liquid-crystal screen
Touch screen input, easy operation
Curve freezing: Manual/Auto mode, controlled by pedal
Built-in speed thermal printer