In the early autumn, it is in a high temperature and rainy season, and there are often sunburns and floods, which have a great impact on vegetable production. Therefore, vegetable farmers should take measures to prevent burning and phlegm. In the late autumn, high temperature and low rainfall, high temperature and dry season can easily cause the aging of vegetables, affecting the normal growth and quality of vegetables. Therefore, planting vegetables should pay attention to prevent drought at this time, and can start from the selection of varieties and reasonable management measures to reduce the drought on vegetables. The hazard produced.
Anti-sunburn. 1. In the summer and autumn high temperature season, shade nets should be used to reduce the temperature inside the shed and avoid direct sunlight. The sheds should be ventilated and cooled in time. If the temperature in the shed is too high, it should be properly irrigated to replenish soil moisture and prevent the body temperature from rising. High, the fruit loses water and the sun burns. 2. Pay attention to reasonable close planting so that the stems and leaves are covered with each other to prevent the fruits from being directly exposed to sunlight. 3. After the disease is found, it should be removed in time. 4. In the process of growth, medium and trace elements should be replenished in time to improve the ability of crops to resist stress. 5. Spray 6000 times of liquid natural brassinolide-Shuofeng 481 in the hot season, which has certain effects on the prevention and treatment of sunburn.
Flood prevention. 1. Discharge in time to remove stains. Prevent plant death due to water accumulation and waterlogging. 2. Timely cultivating. When it can land, timely cultivating loose soil, breaking the knot, improving soil permeability and promoting root development. 3. Timely topdressing. Topdressing with quick-acting nitrogen fertilizer and decomposed organic fertilizer solution is better, and pay attention to proper application; it can also use 0.3-0.5% urea solution, 2% calcium perphosphate leaching solution, 0.2%~0.3% potassium dihydrogen phosphate solution and spray Shibao, Foliar fertilizers such as amino acids are applied as foliar surfaces to promote the normal growth and development of plants and increase vegetable yield. 4. Control pests and diseases in a timely manner. After the disaster, the field temperature is high and the humidity is high, which is suitable for a variety of pests and diseases, and should be promptly investigated and treated. 5. Replant other crops in time. Due to the disaster-rejected fields, it is necessary to promptly illuminate the sputum, reduce the dark stains, seize the season, and rush to plant fast-growing vegetables or mung beans, red beans and other small grains to maximize the disaster losses. 6. Strengthen the construction of water conservancy facilities and use water reasonably.
Drought prevention. In the late autumn and dry period, attention should be paid to the construction of water conservancy facilities, the construction of small reservoirs, and the improvement of drought resistance of vegetable production bases. For plots with irrigation conditions, the existing water sources, drought-resistant appliances and facilities should be fully utilized, and water-saving irrigation techniques such as drip irrigation and sprinkler irrigation should be used for scientific irrigation. Flood irrigation should be strictly prohibited to save water. Scientifically and rationally arrange water resources to ensure some key vegetables and water demand during key periods.
Should start from the following three aspects:
Choose drought-resistant varieties. At this time, autumn leaves, leaves, beans, melons and other vegetables have some varieties with strong drought resistance, should pay attention to choose. Varieties with strong drought resistance can generally prolong the time of drought resistance, and in the case of short water shortage, they can quickly return to normal growth state by irrigating vegetables. In areas with dry and low water, reduce the area planted with vegetables that require large amounts of water.
Properly cover the face. For open summer vegetables that have not been covered with glutinous rice, they should be covered with grass straw in time to store water and keep moisture, reduce water and nutrient consumption, and promote growth. Farmers using greenhouses or small sheds can cover the sunshade net to reduce direct sunlight, reduce temperature, reduce water evaporation, and ensure the normal growth of vegetables.
Strengthen the construction of water conservancy facilities and use water reasonably. Pay attention to the construction of water conservancy facilities, build small reservoirs, and improve the drought resistance of vegetable production bases. For plots with irrigation conditions, the existing water sources, drought-resistant appliances and facilities should be fully utilized, and water-saving irrigation techniques such as drip irrigation and sprinkler irrigation should be used for scientific irrigation. Flood irrigation should be strictly prohibited to save water. Scientifically and rationally arrange water resources to ensure some key vegetables and water demand during key periods.
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