Title: Temperature and humidity regimes in naturally ventilated and fan-pad cooled greenhouses under mild climatic conditions
Abstract: Temperature and humidity variations have been observed for naturally ventilated and fan pad-cooled greenhouses in comparison to ambient conditions for a period of one year under Bangalore climatic conditions. Performance of gerbera crop has been monitored in the two greenhouses and linked to the greenhouse temperature and humidity conditions. Seasonal average temperatures in the naturally ventilated greenhouse were generally close to the ambient air temperatures and were higher by about 0.5 - 1.6 C only. Relative humidity of naturally ventiated greenhouse was close (within 5%) to the ambient relative humidity, whereas in case of fan - pad cooled greenhouse, the greenhouse temperatures were 3 -4 C lower than ambient during summer months. At other times of the year, the temperatures in fan - pad cooled greenhouse were 10 - 30% higher than ambient air values. The crop performance in naturally ventilated greenhouse was observed to be superior to that in the fan - pad cooled greenhouse. Higher relative humidities in fan - pad cooled greenhouse appear to be responsible for higher disease incidence and consequently poorer crop performance.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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