After a long period of rain in the spring, on the one hand, the stems and leaves of vegetables often cause stomatal obstruction due to adhesion of some dirt impurities, affecting the respiration, transpiration, and photosynthesis of the leaves; on the other hand, it is easy for the plants to break down and the leaves and stems break and resist. Greatly weakened, extremely susceptible to various diseases, resulting in a pandemic of the disease. In order to minimize the impact of heavy rain on exposed vegetables, the following measures must be taken.
Clean up the ditch in time to eliminate the accumulation of water after the rain is over, should promptly wash away the sediment on the leaves and vegetables, so that the vegetables to maintain normal breathing state, righting plants, reduce the phenomenon of vegetables squeeze each other. Clean up the field ditch in time, clear the channels, prevent water accumulation, raise the surface of the crops properly, reduce the water level in the vegetable fields, promote the growth of the roots of the plants, and ensure that the rain in the fields is stopped and dried; the vegetables in the protective field should be opened in a timely manner to ventilate and ventilate to reduce the shed humidity.
Replanting vegetables and seedlings that have little impact on the rainstorm and can be remedied in a timely manner. Plants should be properly straightened and the sludge adhered to the leaves should be washed; for the old and yellow diseased leaves, they must be removed in time and cultivators should be used to prevent soil compaction. Topdressing and spraying foliar fertilizers to restore plant growth as soon as possible; vegetables such as eggplants and melons that are heavily infested but still capable of absorbing roots can be cut off by overly dense shoots or shaded nets. Shade the shade to prevent sudden sun exposure, reduce excessive evaporation of plant body water, and prevent wilting due to physiological water loss. For the vegetable fields that have caused no harvest, the shorter-growing Chinese cabbage vegetables are replanted to reduce losses.
Harvesting vegetables in time such as leafy vegetables, beans and melons that can still be harvested in a timely manner should be harvested as soon as possible. After harvesting, it should be chosen to be aired in a sheltered and ventilated and ventilated place, drained and put on the market in time to avoid accumulation of mildew.
After cultivating the topsoil in the cultivating soil, implement cultivating loose soil, increase soil oxygen, and properly cultivate soil to promote normal growth and development of vegetables.
Timely compensatory fertilizers will cause weakening of the root activity of the vegetables and decrease the capacity of water absorption and absorption. The fertilizer should be promptly recharged. Each mus of 1.5 kg of urea (or 3 kg of ammonium sulfate) plus 0.4 kg of potassium chloride, while using phosphoric acid II Hydrogen and potassium solution was added to the foliar with 1% imported urea to enhance the ability of absorbing fertilizer and quickly restore vitality.
Intensifying field management, pest control, and even raining can also lead to physical damage to vegetables. In addition, the humidity in the field is high, the wounds are susceptible to pathogenic bacteria, and the diseases are likely to become epidemic. It is advisable to spray pesticides before the rain or during the rainy days to prevent the occurrence of diseases. . Post-disaster vegetables are prone to downy mildew, powdery mildew or soft rot, and should be sprayed with 72.2% Preclosure 600-fold or 69% Kean-Mn-Zn wettable powder 500-800 times in a timely manner to prevent disease occurrence. .
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