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Differentiation of characteristic grasses and legumes of Salamanca by their mineral composition



Differentiation of characteristic grasses and legumes of Salamanca by their mineral composition



Studia Oecologica 2(2): 137-152



The relationship between mineral composition and taxonomic classification of plants was investigated using correspondence analysis techniques on N, P, K, Ca, Mg, Fe, Mn, Cu and Zn concn. in Molineriella laevis, Agrostis castellana, Dactylis glomerata, Festuca rubra, Bromus hordeaceus, Vulpia bromoides, Poa bulbosa, Hordeum murinum, Holcus lanatus, Alopecurus pratensis, Trifolium arvense, T. campestre, T. striatum, T. subterraneum, T. dubium, T. repens, T. pratense, Medicago arabica, M. sativa and Ornithopus compressus. The grass spp. were clearly separated in a general analysis, but this only separated the legumes into a group clearly separated from the grasses. A separate analysis of the legumes alone, however, demonstrated the differences between them. This extra analysis was probably required because the mineral concn. were more homogenous in the legumes than in the grasses. Differences between the groups were also demonstrated by correlations beteeen the various elements and the N:P:K and K:Ca:Mg equilibrium ratios.

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