"Two Preventions" for Vegetables under Rainy and Cloudy Canopy in Autumn

On cloudy and rainy days in autumn, shed vegetables have symptoms such as protruding and frequent bacterial diseases, which reduces the yield and quality of vegetables. So, what issues should be paid attention to in vegetable management under rainy weather?

1. Excessive humidity prevention For cooling and dehumidification, in addition to increasing air outlets, setting sunshade nets or spraying cooling agents, laying rice husks, straws or broken straws and other organic matter in the operation row is a very important issue for vegetable farmers. Effective dehumidification and cooling method. This is because laying these organic materials is like laying a "mat" on the ground, which can reduce the heat absorption of the soil, reduce the heat storage in the shed, and have a good effect on cooling the shed. More importantly, laying The organic matter such as rice husk, straw or broken straw has the function of moisture absorption and moisture retention, that is, it absorbs humidity in the air and reduces soil evaporation, so as to achieve the purpose of cooling and humidity.

Second, prevent rainwater from entering the shed. The front face of the solar greenhouse is the main channel for rainwater to enter the shed. Therefore, the front face should be drained in advance to prevent rainwater from flowing into the shed. Pay attention to the protection of the shed that is dug deep under the front face. The wall at the front face. It can be repaired with soil or bricks before the rainy season comes; in addition, if the entrance and exit of the shed are set on the back wall, it is recommended that vegetable farmers set up one or two steps at the entrance and exit to prevent rainwater from flowing into the shed. The vents on both sides of the arch canopy are also channels through which rainwater can easily "sneak in". Vegetable farmers can set up a rain film at the vents in advance to prevent rainwater from entering the shed.

The vegetable farmers should be reminded that if rainwater enters the shed, the first thing the vegetable grower has to do is drain the accumulated water out of the shed, and then hoe when the soil is half-dry and half-wet to loosen the soil, increase soil permeability, and reduce Rooting phenomenon and the occurrence of various soil-borne diseases.

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