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DYNAMICS OF GRASSLANDS SOIL PRODUCTIVITY UNDER THE ALTITUDINAL INFLUENCE. CASE STUDY OF THE SUREANU MOUNTAINS AREA IN ROMANIA
Abstract
The study aimed to identify the influence of the altitudinal difference on the fertility characteristics of grasslands soils and implicitly on the production and quality of plant associations intended for grazing with animals. For that, the study material was represented by the soils of the grasslands in the region of the ?ureanu Mountains, part of the Southern Carpathians of Romania. From a geographical point of view, distinct formations were identified in the studied area with altitudes between 250 m and 1800/1850 m as high plains, high hills; subalpine and alpine areas. In the research, the area identified three types of predominate grassland soils: dystric leptosol (21%), albic stagnic luvisol (18%), and moderately eroded albic stagnated luvisol (17%). In general, all these soils from the permanent grasslands have as common characteristics: pseudo-gleysation, moderately to strongly acidic reaction, and moderate humus content, which causes low nutrition of the grassland species, especially those with high fodder value (grasses and legumes). As a result, it can be observed that depending on the altitude, the productive characteristics of the soil fertility indicators also evolve. Thus, at average altitudes of 300 m, the soil of the stagnated luvisol type dominates, towards 1000 m altitude, the dystric leptosol appears, and around the altitude of 1850 meters, the soil of the dystric cambisol overshadowed the gleyic type dominates.
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