    First, the main symptoms. Cucumber premature aging refers to the lack of viability of the plant to maintain the normal life cycle of the cucumber. When the cucumber is not ripe, the activity is significantly reduced, affecting the yield and quality. The premature aging of cucumber is the most serious in January and March, and the common symptoms of premature aging Mainly the leaves turn yellow, the plants shrink, the fruit is slow to develop, and the lower part of the 50 cm is more than a melon; the melon is serious, and when it is serious, the plant can die.
Second, prevention measures
1. Deeply turn over the land and apply enough base fertilizer. Acre of high-quality farmyard manure 24, 80 kg of diammonium phosphate, 50 kg of potassium sulphate, supplemented with 1000 kg of wheat bran fertilizer, within two months before sowing, with three deep application, and sprayed with disinfectant The new high-fat membrane disinfects the soil; it is necessary to fill the water several times in winter and spring, and to maintain good soil permeability. At the same time, spray a new high-fat film 800 times liquid to keep warm and prevent moisture evaporation.
2. Reasonably adjust light, temperature and gas. On sunny days, when the sun rises, it will pull up to facilitate the increase of light; the temperature difference between day and night is small, and the night temperature should be appropriately reduced. The temperature should be strictly controlled when the long-term yin is clear, and the ventilation gas is used to supplement the carbon dioxide gas and discharge harmful gases. After entering the melon period, artificially apply carbon dioxide for about two hours before pulling it daily.
3. Water and fertilizer management during the growing season. Planting seedlings for 20 to 30 days, once water, 55% of the root melons are stabilized and then watered, then spray a new high-fat film to prevent the infection of the bacteria, protect the seedlings to grow stronger; then spray the flower to promote the king 3 Prosperity, promote flower bud differentiation, spray Zhuang Gualing in the pre-flowering, young fruit, and expansion period to enhance the nutrient-oriented delivery volume, promote the rapid development of the melon body, beautiful melon shape, juicy and delicious; enter the melon phase Potassium sulphate (or potassium dihydrogen) plus a new high-fat film sprayed in a proper amount; in the early stage of cassava, the fertilized water is usually applied once every 8 days, not more than 30 kg each time, and once every 15 days. After entering March, the water and fertilizer are alternately poured, and the amount per mu does not exceed 20 kg. Each time the water is poured, trace elements, liquid fertilizers, hormones, etc. are added to enhance the activity of the root enzyme, and a new high-fat film is sprayed to increase the utilization ratio of the active ingredients of the nutrient.
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