What should be done with flooded vegetable greenhouses after a major flood?

Summary: How should flooded vegetable greenhouses be remedied?

Some time ago, affected by typhoon weather, floods occurred in many places, causing serious damage to crops. Especially given the recent sharp fluctuations in vegetable prices, it is estimated that this cannot be separated from the impact of the floods. So how should vegetable remediation work be done well after a flood? Let us discuss it together.

What effects do floods have on vegetables?

After a flood, waterlogging in the fields is severe, bringing many adverse effects to the growth of vegetables. These mainly include: 1. Too long a period of water accumulation will reduce the vitality of vegetable roots and slow their growth. At the same time, roots soaked in water for a long time will suffer from oxygen deficiency and root rot; 2. Increased field humidity not only affects vegetable growth but also easily causes major outbreaks of diseases and pests, such as stem base rot and soft rot; 3. After a flood, the soil easily becomes compacted, causing vegetable roots to grow slowly and reducing their ability to absorb water and fertilizer; 4. Affected by waterlogging, field fertilizer loss is severe.

What remedial measures should be taken after a flood?

After a flood, remedial measures should be taken promptly to minimize losses. This mainly starts from the following aspects: 1. Promptly drain the water accumulated in the fields to prevent vegetables from being soaked in water for a long time, which can cause root necrosis and rot. When soil moisture conditions are suitable, loosen the field soil in time to increase soil permeability and improve root vitality, and promptly straighten lodged vegetables. Rush-harvest vegetables that are already mature.

2. For vegetables whose roots have suffered severe damage, methods to reduce transpiration from the aboveground part can be adopted. Specific practices include: for melon and vegetable crops, remove some yellow, old, and rotten leaves, and carry out appropriate intertillage and earthing up to promote root recovery and growth. For legumes and leafy vegetables, water can be used to wash away the mud remaining on the leaves, and ridge earthing up and intertillage loosening of the soil can be carried out to prevent root rot.

3. Replenish fertilizer in time. Affected by floods, fertilizer loss is severe, and damaged vegetable roots have a reduced ability to absorb water and fertilizer. During this period, foliar fertilizer can be sprayed, such as Qingkulike 100-200 times solution plus foliar fertilizer Wofengsu, or instant fertilizer, to supplement fertility. Plots with younger seedlings may not need supplementation or may need less, to avoid burning the seedlings.

4. Do a good job of disease and pest control in time. High field humidity easily causes major outbreaks of diseases and pests, so after a flood, when the weather turns clear, pesticides for preventing and controlling rot diseases should be sprayed in time, and pests should also be controlled at the same time.

5. Replant and rush-plant in time. After a flood, newly transplanted vegetables may have severe missing plants. At this time, if seedlings can be replanted, do so promptly. In severely affected areas, fast-growing vegetables can be replanted in time after draining water and preparing the land. Examples include fast-growing leafy vegetables such as A-choy, lettuce, and garland chrysanthemum. At the same time, it is currently the season for planting autumn vegetables such as radishes and Chinese cabbage, so sowing and seedling raising should be carried out promptly.

In addition to mastering the above post-disaster remediation measures, farmers should also frequently pay attention to weather changes and take preventive measures in advance according to climate conditions to reduce the losses caused by meteorological disasters.

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