Recently, the external temperature has decreased, the ventilation of the greenhouse has decreased, the humidity in the shed has increased, and the disease has increased, especially the bacterial diseases are high. Here, the farmers should be reminded to adjust the farming operations in time according to the weather changes. The internal humidity is dominant. Specifically, it can be done in the following four aspects:
Reasonable ventilation and dehumidification ventilation are the main means to adjust the temperature and humidity in the shed. When the temperature is high in autumn, the ventilation is large, and the temperature in the current season is gradually reduced, and the ventilation is reduced. In order to reduce the humidity, it is recommended that the vegetable farmers have sectional ventilation. When the temperature is low, the small air outlet is released, and the air outlet is gradually pulled as the temperature rises. If the insulation performance of the shed is good, the vegetable farmers can also properly ventilate at night to ensure a suitable environment inside the shed.
The mulch and the straw are combined to reduce the evaporation of water, that is, the mulching film is laid in the planting line, and the evaporation of soil moisture is reduced, especially after watering, the effect is more obvious. At the same time, in combination with the operation of laying straw, it plays a regulating role. When the humidity is high at night, the straw can absorb part of the water. During the daytime with low humidity, the straw can release the water stored by itself, which can regulate the humidity of the air. It can avoid stepping on the hard surface during manual operation.
Improve the traditional large-water flood irrigation method of irrigation technology, which wastes water and is easy to root, causing the humidity in the shed to increase and cause diseases. New irrigation techniques such as drip irrigation and sprinkler irrigation allow water to gradually penetrate into the soil and improve water use efficiency. At the same time, on the day of watering and the next day, increase the ventilation with the increase of temperature and dehumidify as soon as possible.
Changing the mode of administration At present, vegetable farmers still use spray as the mainstay, which will increase the humidity in the shed. It is recommended that when farmers spray on sunny days, it is best to do it at around 3 pm, try to spray before dark to ensure that the liquid is completely Absorption, when there is a cloudy day, the vegetable farmers can use automatic sprayers, mist sprayers, and reduce the amount of medication. In addition, the agent used in the root is preferably irrigated to ensure the efficacy and reduce the soil moisture.
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