INFLUENCE OF SALT CONTENT OF PLIOCENE CLAY SOIL ON THE EMERGENCE OF SIX GRASSES

摘要: ABSTRACT The effects of three soil salinity levels (450, 925, and 1150 μS/cm) on the emergence six grasses from a clay badland area central western Italy were investigated. species five annuals (Aegilops geniculata, Brachypodium distachyum, Hordeum maritimum, Parapholis incurva, strigosa) growing in pioneer association Parapholido- Artemisietum cretaceae, perennial Bromus erectus, dominant grasslands. tests made plastic pots filled with soils having different salt contents. A control, conducted Petri dishes distilled water, showed high germination percentage for all but rates. In tests, rate decreased increasing salinity. Final percentages higher than 70% salinities, except P. incurva strigosa (60 46.7%, respectively) at highest level. B. erectus lowest emergen...