After the temperature drops, what adjustments should be made to the management of vegetables in the shed?

After a new round of cooling, the night heat preservation of vegetables in the shed has become the focus of management work. To do a good job of insulation work, we must first ensure that the insulation facilities of the shed are intact and effectively operated, and can play their due role.

At the same time, after cooling, the temperature will rise, so the heat preservation work should be properly adjusted with the change of temperature, as far as possible to regulate the appropriate temperature range required for vegetable growth, to promote the healthy growth of vegetables, good flowers and fruits, obtain higher yield, and finally achieve the purpose of improving the overall benefit of the shed.

1. Inspection and debugging of thermal insulation facilities

Focus on checking the fixed work of thermal insulation quilt. The thermal insulation quilt used for many years will have more or less signs of loosening, and it is recommended to fix it in time.

Do a good job of insulation quilt three prevention work. First, waterproof work, no matter what kind of insulation, you need to do a good job of internal and external layer protection, non-woven insulation is not only to cover the outer layer of floating film, but also need to lay moisture-proof film at the bottom; The second is windproof, by adding sandbags, the upper end of the insulation is compacting, and it is also necessary to lay a windproof film in the east-west direction to avoid a large amount of air entering the bottom of the insulation when the north wind blows; The third is fire prevention, more flammable items in the shed, low temperature season, dry things, easy to fire, it is recommended that vegetable farmers be vigilant.

Second, flexible response to temperature fluctuations

Set and fix all kinds of membranes in advance. For example, the windshield plays a buffer role in the cold wind into the shed, reducing the occurrence of skin, cracked fruit, etc. The greenhouse windscreen is arranged at the top of the air outlet, which can be fixed or active.

The float film should be compacted. The role of the floating film has three, one is to play a insulation role, the second is to play a waterproof role, and the third is to prevent the insulation from being blown over by the wind.

Reasonable ventilation can play a role in regulating temperature and humidity, and the ventilation should be opened and closed step by step.

3. Widen the temperature difference between day and night to promote the accumulation of nutrients

In order to maintain a balance between vegetative growth and reproductive growth, temperature regulation is the first. Especially for the vegetables in the early fruit stage, the berries are not fully grown, and the appropriate temperature should be maintained to promote the accelerated growth of nutrients.

At the same time, it is necessary to widen the temperature difference between day and night, promote the accumulation of organic nutrients, and improve vegetable production. The supply of organic nutrients of vegetables is mainly carried out by leaves. The daytime temperature is 25-28 ℃, which is most suitable for light action, the photosynthetic rate is the highest, and the organic nutrients produced are the most. Respiration is another major factor affecting the accumulation of nutrients, and attention should be paid to reducing night temperature and reducing respiratory consumption to promote the accumulation of nutrients. It is necessary to make good use of facilities and environmental conditions to widen the temperature difference between day and night and promote the accumulation of nutrients. Generally, the temperature of the shed should be controlled at 30 ° C during the day, and the night temperature should be controlled at about 15 ° C.