Halosubnitrophilous pastures of the west of the regional community of Castilla y Léon (Spain)
Ladero, M.; Valle, C. J.; Amor, A.; Santos, M. T. Santos; Gutiérrez, A.
A study is made of halosubnitrophilous perennial pastures of livestock interest in the Duero Basin (Spain). Characterized floristically and physiognomically by Poa bulbosa and Trifolium ornithopodioides, these pastures have annual halophilous (Frankenia pulverulenta, Hordeum marinum, Hymenolobus procumbens, Parapholis incurva and Scorzonera laciniata var. subulata) and perennial (Camphorosma monspeliaca, Plantago maritima and Puccinellia caespitosa) elements as well as many therophytes belonging to Helianthemetea guttai. From the results emerges a description of the new association Trifolio ornithopodioidis-Poetum bulbosae, which we include in the alliance Poo-Astragalion sesamei (Poetalia bulbosae, Poetea bulbosae). The floristic-sociological analysis is complemented with edaphological, bioclimatic and dynamic data relating to the new association.