Articles
RECENT DEVELOPMENTS IN RESEARCH ON THE MICROENVIRONMENT OF GREENHOUSE (Application to certain crop systems)
Several improvements achieved in the glasshouse equipment with an increase in energy saving, combined with an efficient control of all factors, will help for the better future prospects of the protected crops.
However for an increase of the productivity, another alternative is to develop new technological systems, which may improve the efficiency by reducing the heat consumption, with a higher mechanization of the operations, shorter periods of the cycles in order to control all factors, including plant maximum potentiality.
There is a complex of factors that involves in the increased biological productivity under glass and plastichouses (Fig.1)
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Recently more and more vegetable crops on several substrates as mineral wool, peat, on a layer of plastic or concrete are common, mostly because of plant pathological reasons.
In Northern Europe, in countries as England and Sweeden a large area of cucumber and tomato crops under glass are grown on mineral wool, peat bags, and nutrient films.
In Romania several trials on peat bags and other systems, have shown advantages as concern pest and disease control, the materials are sterile and need no desinfection.
Soil preparation is eliminated but it is necessary a good knowledge on the composition of the nutrient solutions.