| 温室大棚内湿度的管理 |
| 添加时间：2017/6/14 16:13:20 浏览次数： |
| 温室大棚内湿度的管理 Management of humidity within the greenhouse 塑料薄膜不透气，棚内栽培由于土壤水分的蒸发和作物的蒸腾作用，使棚内空气湿度增长，若不通风，棚内空气相对湿度可达90%以上， 甚至达100%。其变化规律是棚温升高，相对湿度降低；棚温降低，相对湿度升高；晴天、有风天相对湿度低，阴天、雨天相对湿度增高。棚内的绝对湿度随棚温升高而迅速上升，甚至成倍增加。如果棚内相对湿度过高，植株叶片的蒸腾作用就会受到抑制，土壤湿度和棚内的空气湿度增高，棚膜上凝结大量水珠，既影响作物的光合作用，不利于植株的生长发育，又使病菌繁殖，病害流行，危害严重。因此，调节棚内温、湿度，特别是夜间温、湿度，是防治病害、促进作物生长发育的重要措施，应给予重视和加强。 Plastic film is airtight, relative cultivation due to soil water evaporation and crop transpiration, make the relative humidity of the air of growth, without ventilation, heat air relative humidity can reach more than 90%, even up to 100%. The law of change is that the shed temperature rises high, relative humidity decreases; Lower ceiling temperature, higher relative humidity; Sunny days, weather relative humidity is low, cloudy day, rainy relative humidity increases. Absolute humidity in the shed rises rapidly, and even doubles, with the ceiling. If the relative humidity is too high, plant leaf transpiration will be suppressed, soil moisture and higher relative air humidity, shed film condensation on a large number of water droplets, not only affects crop photosynthesis, is not conducive to plant growth and development, and bacteria breeding, disease epidemic, hazard is serious. Therefore, regulating relative temperature and humidity, temperature, humidity, especially the night is the prevention and treatment of diseases, promote crop growth and development of the important measures, should be given attention to and strengthened. |
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