Agriculture Reference
In-Depth Information
External shading is preferable, but its
installation is much more expensive.
Whitewashing the greenhouse cover is
•
The set point temperature to ventilate
(threshold temperature) usually ranges
between 23 and 26°C, although if car-
bon enrichment is used it may be a lit-
tle bit higher.
The RH set point to ventilate ranges
•
a type of low-cost permanent shading,
which is widely used during the high
radiation seasons.
Management of ventilation to maintain
•
•
between
75%
(daytime)
and
85%
a suitable temperature involves achiev-
ing high air exchange rates which may
be as high as 80 or more greenhouse
volumes h
−1
in full summer, in the
Mediterranean area, in a totally devel-
oped crop.
(night).
The decrease of the environmental
•
humidity, when heating is available,
can be achieved by heating and venti-
lating. It is an effective method but it
uses a lot of energy.
