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冬季,棚室蔬菜病害往往发生严重。关键的因素就是棚内湿度高,尤其是夜间茎叶上结露严重,给病原菌侵染提供了充足的时间保证。在冬季低温、通风减少的情况下,菜农们应该如何降低棚内湿度呢?措施一深冬期要保证棚内夜温。保持合适的昼夜温差,避免棚内夜温过低,是降低棚内湿度、控制结露的主要措施。一般保证棚内昼夜温差在10℃左右为好。
Winter, greenhouse vegetable diseases are often serious. The key factor is the high humidity in the shed, especially the severe condensation on the stem and leaves at night, which provides sufficient time guarantee for pathogen infection. In the winter low temperature, reduced ventilation, vegetable farmers who should be able to reduce the humidity within the shed? Measures a deep winter to ensure shed temperature. Maintaining a suitable temperature difference between day and night and avoiding too low night temperature in the shed are the main measures to reduce the humidity in the shed and control the dew condensation. Generally guarantee shed temperature difference between day and night at around 10 ℃ as well.