Articles
YIELD RESPONSE OF A SWEET PEPPER CROP TO DIFFERENT METHODS OF GREENHOUSE COOLING
Article number
719_58
Pages
507 – 514
Language
English
Abstract
The influence of three methods cooling (white washing, fogging and forced ventilation) on the growth and yield of substrate grown sweet pepper crops grown in three similar greenhouses was evaluated.
Cover whitening and fogging were the most efficient in controlling the maximum temperature and VPD, mainly during the vegetative development phase.
The cooling methods adopted did not show any significantly different effects on total and marketable yield, despite the radiation reduction by the white wash.
The crop subjected to the fog system showed the highest incidence of blossom end root (B.E.R.). The water use efficiency in relation to the marketable yield was higher with the whitening than with forced ventilation (16.2%) or with the fog system (29.2%). An economic evaluation showed that whitening was the most profitable cooling treatment.
Cover whitening and fogging were the most efficient in controlling the maximum temperature and VPD, mainly during the vegetative development phase.
The cooling methods adopted did not show any significantly different effects on total and marketable yield, despite the radiation reduction by the white wash.
The crop subjected to the fog system showed the highest incidence of blossom end root (B.E.R.). The water use efficiency in relation to the marketable yield was higher with the whitening than with forced ventilation (16.2%) or with the fog system (29.2%). An economic evaluation showed that whitening was the most profitable cooling treatment.
Publication
Authors
J.C. Gazquez, J.C. Lopez, E. Baeza, M. Saez, M.C. Sanchez-Guerrero, E. Medrano, P. Lorenzo
Keywords
greenhouse, forced ventilation, whitening, evaporative cooling and fog system
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