In recent days, persistent weather such as continuous low temperature, rain, snow and sunshine has shown a tendency of multiple occurrences, causing great losses and serious impacts on the production and supply of vegetables in greenhouses. In order to reduce disasters to a minimum and enhance the ability to respond to severe winter storms and snows in winter, the following countermeasures have been proposed:
Increase lighting and increase the temperature of the greenhouse. One is the hanging reflective film. In the sunlight greenhouse, the width of the aluminum plated mirror reflective film is about 1 meter wide at the north side or at the back wall, which can increase the illuminance from 0 to 3 meters from the reflective film by 9% to 40%, and the temperature increases by 1°C~3. °C, the ground temperature increased by 0.7 °C ~ 1.9 °C, can greatly improve the light and temperature conditions of cultivated northern and central crops, is conducive to resist low temperature and sunshine. The second is to install plant fill light. After the straw is put down, the fill light (incandescent light) is turned on. According to the weather condition, the light is added for 3 to 5 hours to reduce the incidence of diseases in the greenhouse.
Reduce humidity and control disease. In deep winter or low-temperature rain and snow weather, the air in the greenhouse has high humidity and is prone to induce damage. It is forbidden to use flood irrigation. It is advisable to pour less water and dilute it. It should be ventilated and ventilated at noon for a short time to control the occurrence of diseases. Special attention must be paid to greenhouses. °C ~ 25 °C temperature range The relative humidity of the air should be controlled below 90%, after the onset of aerosol or dust can be used for prevention and treatment.
Spraying nutritional liquids and other protective agents to prevent diseases. In order to prevent wilting of vegetables after peeling, spray 1 to 2 foliar fertilizers to supplement nutrients, and add broad-spectrum fungicides against fungal diseases such as downy mildew to enhance the resistance of the plants. Cold resistance.
Tg Concentrates,Fish Oil 5/25 Tg,5/25 Tg Tg Concentrates,Fish Oil Omega-3
ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com