With the improvement of agricultural technology, more and more people choose advanced agricultural technology, and they have chosen greenhouse cultivation techniques in order to improve economic efficiency. So what are the key points in greenhouse cultivation?
1, ventilation and dehumidification
Ventilation is the most fundamental dehumidification method in greenhouses. Ventilation must be carried out at low temperatures, otherwise it will cause the temperature in the shed to fall. Within a day, the best time for venting and venting is midnight, because the humidity in the shed is large and the moisture is simply squeezed out. At other times, under the premise of the temperature request, the wind-through time is extended. If the temperature drops too fast when the air is ventilated, close the air vents in real time to avoid sudden temperature drop and risk the vegetables.
2, accept the mulch film cover dehumidification
The mulching film can add surface water to the shed, which is the main way to reduce the humidity in the shed.
3, using dust method, smoke method to apply moisture
By accepting the dust method and the smoke method, it is possible to avoid increasing the humidity of the atmosphere due to the spray and enhancing the control results.
4, cultivating dehumidification
After cutting the soil capillary, the soil capillary water can be prevented from rising to the surface layer, and a small amount of evaporation of the soil moisture can be avoided.
5, natural moisture absorption
Spread a layer of straw, wheat straw, quicklime, or a layer of grass ash between rows to ineffectively absorb water vapor or fog and reach the target of dehumidification.
6, heating and cooling
When the temperature in the greenhouse is low, the relative humidity of the indoor temperature can be lowered, and the demand for temperature of the vegetables is also satisfied.
7, fair watering and humidity control
Watering is a secondary factor in the addition of humidity in the shed. In winter and spring, you can choose sunny day ditching or ramets watering, and the mulch film can cover the film under the dark irrigation. Strictly control the amount of watering. Appropriate air is released after watering, and the soil is drained in real time to reduce the humidity of the atmosphere.
8, increase the amount of light transmission and humidity
Increasing the amount of light transmission can enhance the temperature of the shed, and the temperature of the shed can increase the saturation of the ambient temperature, thereby lowering the relative humidity of the atmosphere.
9, accept the moisture absorption of the good insulation screen moisture absorption
A canopy is placed in the shed, and a moisture-permeable and hygroscopic insulation material such as a non-woven fabric can be used to suppress condensation on the inside and outside, and the dewdrop can be prevented from falling onto the plant, thereby lowering the humidity of the atmosphere.
10. Pest control
In summer, the greenhouse pests and diseases of greenhouses should be controlled by the smoke method or the dust method. If the spray method is applied, the number of times of prevention and the amount of liquid spray should be properly added to avoid the humidity in the shed being too high.
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