Search

Dryland areas cover about 41 % of the Earth’s surface and sustain over 2 billion inhabitants. Soil carbon (C) in dryland areas is of crucial importance to maintain soil quality and productivity and a range of ecosystem services. Soil mismanagement has led to a significant loss of carbon in these areas, which in many of them entailed several land degradation processes such as soil erosion, reduction in crop productivity, lower soil water holding capacity, a decline in soil biodiversity, and, ultimately, desertification, hunger and poverty in developing countries. As a consequence, in dryland areas proper management practices and land use policies need to be implemented to increase the amount of C sequestered in the soil. When properly managed, dryland soils have a great potential to sequester carbon if financial incentives for implementation are provided. Dryland soils contain the largest pool of inorganic C. However, contrasting results are found in the literature on the magnitude of inorganic C sequestration under different management regimes. The rise of atmospheric carbon dioxide (CO2) levels will greatly affect dryland soils, since the positive effect of CO2 on crop productivity will be offset by a decrease of precipitation, thus increasing the susceptibility to soil erosion and crop failure. In dryland agriculture, any removal of crop residues implies a loss of soil organic carbon (SOC). Therefore, the adoption of no-tillage practices in field crops and growing cover crops in tree crops have a great potential in dryland areas due to the associated benefits of maintaining the soil surface covered by crop residues. Up to 80 % reduction in soil erosion has been reported when using no-tillage compared with conventional tillage. However, no-tillage must be maintained over the long term to enhance soil macroporosity and offset the emission of nitrous oxide (N2O) associated to the greater amount of water stored in the soil when no-tillage is used. Furthermore, the use

A causa de la ràpida evolució de la tecnologia, una gran quantitat de publicacions sobre pastures i farratges fetes a Catalunya han quedat oblidades. S'aprofita l'oportunitat de participar en el projecte «Tipificación, cartografía y evolución de los pastos españoles (1800-2004)» per posar al dia la revisió bibliogràfica. Amb la nostra recerca s'han trobat 316 articles o llibres sobre cultius farratgers i 159 sobre prats i pastures que en aquest treball es presenten ordenats per cultius., Because of the fast evolution of technology, a very important number of publications about pasture and forage made in Catalonia have been forgotten. There is an opportunity to work with «Tipificación, cartografía y evolución de los pastos españoles (1800-2004)» to make a bibliographic revision. We have found 316 articles or books about forage’s crops and 159 which speak about meadows and pastures, they appear arranged by cultures., Debido a la rápida evolución de la tecnología, una gran cantidad de publicaciones sobre pastos y forrajes hechas en Cataluña han quedado olvidadas. Se aprovecha la oportunidad de participar en el proyecto «Tipificación, cartografía y evolución de los pastos españoles (1800-2004)» para poner al día la revisión bibliográfica. Con nuestra investigación se han hallado 316 artículos o libros sobre cultivos forrajeros y 159 sobre prados y pastos que en este trabajo se presentan ordenados por cultivos.

[EN]: In this article the authors briefly present their research into the interaction between pastures and herbivores in the Southern Pyrenees. Previous studies which have partly cleared up some particular aspects of the two elements in the system (pastures and consumers) have been mentioned, as well as methodology used.

[EN]In this paper the authors study the spring evolution of Pyrenean meadows of Huesca province (Spain), across the changes in organic components (NDF, ADF, hemicelluloses, cellulose, lignin, DNDF, DCC, DMD and protein), during three periods of sampling (April-May, May-June, June-July). Different types of meadows are classified according to relations between organic components and floristical composition (grass, legumes, other plants) at time of the 1st cut (June-July)., [ES]En el presente trabajo se estudia la evolución primaveral de algunos prados del Pirineo de Huesca, a través de los cambio que se registran en sus componentes orgánicos (NDF, ADF, hemicelulosa, celulosa, lignina DNDF, DCC, DMD y proteína) a lo largo de tres muestreos (abril-mayo, mayo-junio y junio-julio). Se clasifican también distintos tipos de prados de acuerdo con las relaciones existentes entre los componentes orgánicos y la composición florística (Gramíneas, Leguminosas y otras familias) en el momento del corte para henificar (junio-julio).