Greenhouse Vegetables Antifreeze and Remedial Measures

In recent days, the sudden drop in temperature has had a serious impact on the vegetable production in our county. In particular, vegetable seedlings in greenhouses are particularly serious. In order to do a good job in preventing freezing and relieving disasters, the greenhouse vegetable anti-freezing measures are proposed in order to ensure the safety of vegetables in our county.

First, strengthen coverage

In the shed, a small arch shed, a bamboo arch, etc., as arches, covering the film at night, covering the grass on the film; cover the film in the shed, can increase temperature moisture. The use of plastic film as apron at the bottom of the shed can significantly reduce the cold air intrusion at the bottom; at the same time, attention should be paid to blocking the gaps in various places and minimizing gap heat dissipation. In the north of the greenhouse, straw is used as a windbreak to prevent wind and cold.

Second, temporary warming

When the daytime temperature in the greenhouse is lower than 15°C and the nighttime temperature is lower than 5°C, cold or freezing injury may occur. Temporary warming measures should be taken at night to artificially supplement heat energy. Place several briquettes in the shed to increase the temperature inside the shed. However, attention should be paid to preventing carbon dioxide poisoning. When adding briquettes and removing coal stoves, greenhouses should be ventilated and enter people later.

Third, strengthen fertilizer and water management

Watering in the shed to increase soil and air humidity in the shed has a certain degree of cold-resistance. After irrigation, the vegetables are free from freezing damage at -4°C. With rice vinegar, sugar, superphosphate mixed, dubbed 300 times liquid, sprayed on the foliage, increase the degree of sugar and hardness of mesophyll, and improve cold resistance. Drain the manure water in the shed so that the soil is not easy to freeze, so as to protect the seedlings and prevent cold.

Fourth, strengthen disease prevention and treatment

After the vegetables are frozen, they are susceptible to pests and diseases. Therefore, it is necessary to spray chlorothalonil and other fungicides in time to prevent and control pests and diseases. Spreading wood ash on vegetables is equal to covering the vegetables, which can play a role in antifreeze and also play a role in preventing diseases. At the same time, a fumigant was placed in the shed to burn, killing bacteria in the shed.

Fifth, the management of vegetables after freezing

1. Irrigation and Insulation: Irrigation can increase soil heat capacity, prevent ground temperature from falling, stabilize surface air temperature, and help the temperature rise steadily, so that frozen tissue can restore its function.

2. Ventilation and cooling: When the shed vegetables are frozen, the sheds cannot be heated immediately, and only the air is allowed to cool down, so that the temperature in the shed can rise slowly to prevent the temperature from increasing sharply and causing freezing tissue to be necrotic.

3, artificial water spray: water spray can increase the temperature of the air inside the shed, stabilize the temperature of the shed, and can inhibit evaporation of water from the frozen tissue, promote tissue water absorption.

4, cut away dead branches: timely cutting frozen branches and leaves in order to avoid mild tissue damage caused by frozen tissue.

5. Shelter shade: Put a awning in the shed to prevent the frozen vegetables from being directly exposed to the sunlight, causing the tissue to lose water and shrink and lose its vitality.

6, make up the fertilization material: After the frozen tissue by the seedlings, we must promptly apply the available fertilizer. It can be sprayed with 2% urea solution and 0.2% potassium phosphate solution.

7, the use of hormones: After freezing, plant growth is slow, new leaves and new branches are delayed, can be used exogenous phytohormone spray to promote growth and accelerate body recovery.

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

Ecg Machine

Dynamic Ecg,Dynamic Ecg System,Ecg Machine,Ecg Monitoring System

Changchun Yingwang Times Digital Co., Ltd. , https://www.ccsdsm.com

Posted on