Dealing with haze Weather to ensure the normal growth of vegetables

Haze weather has a great impact on vegetable production: on the one hand, if the concentration of dust particles in haze is too high, the plant will be overwhelmed, thus affecting the respiration of the plant. On the other hand, in haze weather, the air fluidity is poor and the sunlight is blocked, thus affecting the photosynthesis of the plant. In particular, it has a great negative impact on the production of protected vegetables. The air temperature and ground temperature in the haze weather shed are low, which have a great impact on the growth of vegetables. At the same time, the humidity in the greenhouse is high, which is prone to diseases. Farmers can take measures from the following aspects to reduce the impact of haze weather on protected vegetables.

1. Keep the greenhouse film clean, eliminate the water droplets in the film in time, and fully maintain the light transmittance of the greenhouse film.

two。 Through the measures of laying reflective film on the ground, hanging reflective film on the wall, painting the inner wall and column surface white, etc., make full use of the reflected light. Where there are conditions, incandescent lamps can be hung in the shed to fill the light manually.

3. Through comprehensive agricultural measures such as pruning and wiping branches and removing old leaves, the light conditions among vegetable populations were improved.

4. Reduce the application of chemical fertilizer, especially nitrogen fertilizer, and increase the amount of phosphorus and potassium fertilizer, biological fertilizer, mature organic fertilizer and so on, in order to improve the cold resistance of vegetables and reduce harmful gas emissions. Spraying Bigou, chitin and other nutritional drugs to promote plant photosynthesis and nutrient absorption.

5. Try to avoid ventilation in foggy and hazy weather to prevent solid particles from falling on vegetable leaves.

6. Careful irrigation, haze low temperature weather is not suitable for irrigation, which will reduce the soil temperature, not conducive to the growth of vegetables.

7. Pay attention to the control of diseases and insect pests. The humidity in the continuous haze canopy is relatively high, which is very easy to cause the outbreak of various diseases and insect pests. In order not to increase the humidity in the greenhouse, aerosol or dust can be used for control.

Chen Shuqiao, Plant Protection Station of Xinji City