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Climate Control in Green House

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Rural Technology

The important factors which are required to be controlled in polyhouses are as follows. 1. Ventilation 2. Increasing or decreasing inside temperature 3. Control of CO2 4. Control of light intensity 5. Humidity 1 Ventilation: - It is necessary for proper air circulation in the green houses. For natural circulation keep the sides of green house open. Exhaust fan may also be used for dragging air out. 2 Temperature Control: - Use of fan and pad method, exhausting hot air out, use of screen and using water sprinklers / foggers temperature could be controlled. 3 CO2 control: - CO2 enrichment by trapping natural CO2 up to 1500-2000 ppm. 4 Control of light intensity:- Using UV stabilized sheet and shade net light intensity is controlled up to 30000 to 60000 lux. 5 Humidity control: - Relative Humidity inside the green house should be 50-80%. It is controlled by using air circulation, using sprinklers and controlling evaporation. Intext questions 10.2

Fill in the blanks

1. Exhaust fan is used for out of the green house. 2. CO2 enrichment is done by CO2 . 3. inside the green house should be 50-80 percent.


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