Cucumber cultivation techniques: what about the premature senescence of cucumber in autumn?

What about the premature senescence of cucumbers in autumn? Is there any way to prevent it? Please help guide the harm of cucumber premature senility: cucumber progeria means that the plant vitality is not enough to support the cucumber to complete the normal life cycle, and the vigor is significantly reduced before the cucumber is ripe normally, affecting the yield and quality. the premature senescence of cucumber is the most serious from January to March, and the common symptoms of premature senescence are mainly yellowing leaves, plant atrophy, slow fruit growth and malformed melons below 50 centimeters. The melon is serious, and when it is serious, the plant can die. Prevention and treatment of premature senescence of cucumber: first of all, enlarge the temperature difference between day and night and increase the light in the greenhouse. Due to the lack of light in the greenhouse, the accumulation of photosynthates is less and the consumption is high, which is one of the reasons leading to premature senility. During this period, the daytime temperature in the greenhouse should be controlled at 20 ℃ 30 ℃, and the night temperature should be 12-15 min. The light in the overcast and rainy shed is weak, so we should wipe the greenhouse film in time, increase the light intensity of the greenhouse, increase the accumulation of nutrients in leaves, and prevent premature senescence of leaves. At the same time, special attention should be paid to the management after continuous cloudy days, because the cucumber has large leaf area, high transpiration coefficient, and the root system is not particularly developed, so it is easy to be injured. After the weather suddenly clears up, the light and temperature change sharply in a short time, which does great harm to the plant. Therefore, after sunny, it is necessary to properly shade, gradually adjust the light and temperature, let the plant slowly adapt to the changes of the environment, in order to reduce the harm of continuous overcast days to the plant. Secondly, strengthen root maintenance to ensure nutrition absorption. Cucumber root system is relatively shallow, mainly distributed in the surface soil layer within 20 cm, which is greatly affected by environmental changes such as ground temperature, water and fertilizer, so the maintenance of cucumber root system should be strengthened before and after cloudy days. During the cloudy days, plant evaporation is very small, unless it is particularly dry, it is best not to water, so as not to cause excessive humidity in the shed, causing retting roots and other problems. After continuous overcast days, it is not suitable for immediate watering, because at this time is in the plant recovery stage, root activity is still relatively weak, if early watering, will lead to root damage aggravated, plant wilting and other problems. It is suggested that after 3-4 days of continuous overcast days, the root system of the plant should recover before watering and topdressing. At this time, the root system is weak, so alginic acid, chitin and humic acid fertilizers conducive to root maintenance and root promotion should be selected. at the same time, they can be supplemented with fully water-soluble fertilizers, such as fragrant run, Leba, etc., 3-5 kg per mu. Remind the majority of vegetable farmers, do not apply poor-quality paste fertilizer with high hormone content, although hormone can promote rapid rooting, but it is very easy to cause plant premature senescence. Finally, foliar nutrition should be supplemented and plant growth regulators should be used reasonably to improve plant stress resistance. In continuous overcast days, the plant is lack of nutrition and its growth is weak, so we should pay attention to supplement the foliar nutrition and enhance the stress resistance of the plant. Foliar fertilizer, chitin and brassinolide can be sprayed to supplement foliar nutrition, promote chlorophyll synthesis and improve photosynthetic efficiency. Click to get more cucumber cultivation techniques click to get more vegetable planting techniques