Suitable weather conditions for horticultural and greenhouse facilities
Weather conditions have a great impact on the setting up of the greenhouse and therefore it should be taken into account to get excellent results from the greenhouse and crops.
climate
1) radiation 2) temperature 3) precipitation 4) humidity 5) evaporation 6) wind speed 7) ventilation
Sun radiation
The sun's radiation in the earth's atmosphere gradually decreases due to absorption, reflection and reflection. The sun's radiation on the surface of the earth changes depending on the latitude and longitude, season, time, day and factors in the atmosphere such as clouds.
The presence of a lot of vapor in the atmosphere greatly reduces the radiation. In the tropics, the average solar radiation remains constant. To grow agricultural products, it is important to know what is the average monthly radiation energy? In most regions of the globe, the difference between daily radiation in winter and summer is large.
The minimum amount of radiation required by plants for growth per day is 2-2.3 m2/kWh (kWh/m2).
In industrial greenhouses, during the fall and winter seasons, the light intensity is reduced, and supplementary light is used if it is affordable.
temperature
Temperature is heat that depends on many factors such as sunlight, season, height above sea level, wind, presence of clouds in the atmosphere, etc. Therefore, it is difficult to mention fixed expressions in this field. The temperature decreases with the increase in height above sea level.
rainfall
Water is a vital element for plant growth. In an area, it is necessary to have information about the rainfall rate, seasonal distribution, intensity and period to protect the growth of plants.
wind speed
High places where strong winds blow in winter are not suitable for establishing a greenhouse, because it causes heat loss and increases fuel costs.
To prevent damage from storms and strong winds in the region, as well as to reduce the amount of fuel consumed, the greenhouse needs a windbreak. A windbreak can be constructed from non-living materials such as a wall or a special green plastic net, or it can be reduced by planting fast-growing and evergreen trees in the wind's path.
The greenhouse should be about 2.5 times the height of the windbreak away from it so that it does not have a negative effect on shading.
In the opposite figure, a weak structure is shown that was destroyed by the wind.