How to manage greenhouse vegetables in low light.

In the process of growing vegetables in greenhouse, we often encounter disaster weather such as smog, which leads to the lack of photos in greenhouse. Vegetable farmers should know that vegetables can't grow well in this environment.

1. Increase the light

Continuous smog weather will lead to insufficient light in the facility, so it is best to choose a transparent greenhouse film with good light transmission, dust prevention, aging resistance and no dripping, and remove the fog and dust on the greenhouse film in time to ensure the light transmission of the greenhouse film; At the same time, under the premise of keeping the room temperature suitable, the shed film should be uncovered as soon as possible to extend the illumination time. Conditional vegetable seedling sites can be hung with wall reflective curtains and ground reflective films to increase the reflection and scattering of light.

In addition, you can also install lighting or hot lights to turn on the lights in the morning and evening to supplement the light for vegetables.

2. Reasonable water and fertilizer management

Try not to water and fertilize in foggy days to prevent lowering the soil temperature and increasing the humidity in the shed. After the weather clears up, add fertilizer and water according to the situation of seedlings.

3. Pay attention to ventilation and dehumidification

The ventilation time is the best when the humidity in the shed is the highest in the morning, or when the humidity in the outside air is the lowest and the temperature is high around noon. At the same time, the defogging device can be used in the shed to reduce the air humidity and reduce the occurrence of diseases.

4. Strengthen pest control

In foggy days, don't use foliar spraying to control pests and diseases. Smoke and fumigant can be used to control pests and diseases, and chlorothalonil and isoprocarb can be used for cross fumigation.

5. Pay attention to the management after clearing.

After the weather clears up, it is necessary to prevent the sudden weather from affecting plants by semi-rolling insulation quilt or using sunshade net. If the plant wilts, the sunshade net should be put down in time; And don't water topdressing immediately, but postpone 1-2 days; Can be combined with chemical control spraying foliar fertilizer to supplement plant nutrition.