Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 2
Written by Feodor FILIPOV, Sorin CĂPȘUNĂ, Tudor AOSTACIOAEI, Denis ȚOPA
In Romania, the surfaces of solariums are extended significant in the last period due to high quality of polythene film used to cover greenhouses and due to improving of plants growing technology such as using the best varieties, plastic mulch and drip irrigation. Our studies performed includes determination of the main morphological parameters, penetration resistance, soil sampling in the field and soil analysis (soluble salts, bulk density, size particles, pH, calcium carbonate) in the laboratory. Following the investigations, it was found that mulching with black plastic foil on the entire surface favors soil compaction and local accumulation of soluble salts especially in the marginal area of the wetting front resulting from drip irrigation. The accumulation of soluble salts was also noticed in the superficial layer of soil on the interval between rows of plants. Wetting of the soils with coarse texture on the intervals between the rows of plants took place following the evaporation, diffusion and condensation of water vapor in the space between the foil and the soil surface. Strong soil compaction and salinization allows us to recommend avoiding plastic mulch over the entire soil surface.
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