Temperature fluctuations should be dealt with by farmers
In recent days, unstable temperatures and prolonged cold weather have had a great impact on vegetable growth and nursery. Therefore, vegetable farmers should take active actions and adopt effective technological defense measures to deal with the effects of cold weather on vegetables.
The effects of low temperature on seedlings are mainly due to lack of light, low ground temperature, slow emergence of vegetables, weak growth, and heavy damping-off; the main impacts on transplanting and colonization are the delay of planting period, prolonged period of seedling growth, and the process of growth and development. The impact is mainly reflected in the weak growth momentum, and the delays in flowering, fruit setting, and going on the market. In the event of severe frost damage, the plants were directly frozen.
1. Defense, remedial technical measures. In early spring, nursery should be prepared for cold protection in advance according to changes in the weather, and films and grasshoppers should be prepared in advance. In the cold weather before the advent of cold weather should be covered with film, take a small shed to keep warm. Seedlings can be sprayed with 0.04% Yunda-120 (Alizarinactone) + 0.3% Potassium Dihydrogen Phosphate, or watered once a day, in order to improve the cold resistance of the seedlings before the sudden cold and cold weather. Obvious effect. When the weather improves, timely top dressing and seedlings are added to strengthen the management of fertilizer and water in the seedling stage and integrated pest control. Before the seedlings are planted, low-temperature seedlings are to be planted. Solanaceous vegetables should be controlled for 5 to 7 days before planting, sunny daytime temperature should be controlled at 22-26°C, nighttime should be controlled at 8-12°C, and the resistance of the vegetables themselves should be improved by low-temperature hardening. Cold resistance, disease resistance, etc. Transplanting vegetables in early spring should be timely covered with plastic film, take a small shed to keep warm. Pay attention to the weather forecast and spray antifreeze on the leaves before cold freezing injury. The formula is to add 50 grams of urea, potassium dihydrogen phosphate and brown sugar for every 15 kilograms of water. Spray it on the back of the leaves every 5-7 days after stirring. Spray 1 time.
2. Prevention of cold freezing injury of exposed vegetables. Before the occurrence of low-temperature freezing damage, soil is cultivated in combination with cultivator, and the depth of soil is 5 to 10 cm, which can loosen the soil, increase soil temperature, and protect the roots. In the afternoon one day before the onset of low-temperature freezing damage, 100-150 kilograms of rice straw per acre is evenly spread over the vegetable pods and vegetables, which can reduce the freezing injury.
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