1. Cucumber is a thermophilic vegetable that is neither cold nor heat-resistant. The suitable temperature for cucumber growth is generally 15-32°C. The suitable temperature for different growth and development stages is different. The suitable temperature for seed germination is 25-30°C, and the suitable temperature for seedling stage is 10-30°C. When the temperature is lower than 12°C, the growth and development of cucumber is slow, and when the temperature is lower than 5°C, the growth of cucumber is chilled. In cultivation, 8°C is used as the minimum temperature limit for cucumber production. Temperature higher than 35 °C, cucumber growth and development blocked, premature aging of plants, abnormal melons increased.
2. The suitable relative humidity for cucumber growth is about 60-90%. The most suitable relative humidity in the growing process is low seedling stage, high plant height, low nighttime and high daytime.
3. The optimum temperature range of the root system is basically the same as that of the plants on the ground, but the most suitable temperature is 20-25°C, which is lower than the optimum temperature of the above-ground part. If the ground temperature is too high or too low, it will affect the growth of the cucumber.
4. The photosynthesis of cucumber requires a large amount of carbon dioxide. Artificially applying carbon dioxide fertilizer in greenhouse cultivation has a good effect on the growth and development of cucumber.
5, cucumber hi wet, afraid of fear of drought, shallow root distribution, weak root groups, absorbent capacity is not strong. Therefore, the cultivation of cucumber must choose the soil with strong water retention and fertility, even water supply, in order to obtain better benefits.
6. The characteristics of absorbing fertilizers in the growth and development of cucumbers are potassium uptake, followed by nitrogen. The absorption of potassium is mainly in the late growth stage. Cucumber production is dominated by the use of base fertilizers, and topdressing is reasonably pursued to prevent premature aging of the plants.
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