NAGIOS: RODERIC FUNCIONANDO

Reduction of the frequency of herbaceous roots as an effect of soil compaction induced by heavy grazing in rangelands of SW Spain

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Reduction of the frequency of herbaceous roots as an effect of soil compaction induced by heavy grazing in rangelands of SW Spain

dc.contributor.author	Pulido, M
dc.contributor.author	Schnabel, Susanne
dc.contributor.author	Lavado Contador, J. Francisco
dc.contributor.author	Lozano-Parra, Javier
dc.contributor.author	Gómez-Gutiérrez, Álvaro
dc.contributor.author	Brevik, Eric C
dc.contributor.author	Cerdà Bolinches, Artemi
dc.date.accessioned	2018-04-18T10:54:12Z
dc.date.available	2018-04-18T10:54:12Z
dc.date.issued	2017
dc.identifier.citation	Pulido, M Schnabel, Susanne Lavado Contador, J. Francisco Lozano-Parra, Javier Gómez-Gutiérrez, Álvaro Brevik, Eric C Cerdà Bolinches, Artemi 2017 Reduction of the frequency of herbaceous roots as an effect of soil compaction induced by heavy grazing in rangelands of SW Spain Catena 158 381 389
dc.identifier.uri	http://hdl.handle.net/10550/65785
dc.description.abstract	Rangelands in SW Spain constitute the most extensive ranching system on the Iberian Peninsula. During the last few decades, a significant increase in livestock numbers, along with a progressive substitution of cattle for sheep, have led to land degradation processes such as the reduction of grass cover and increased soil compaction in heavily grazed areas. Nevertheless, a better understanding of how soil compaction affects grass production is still needed. In this study, some of the effects of soil compaction due to heavy grazing are analysed, mainly the reduction of the frequency of herbaceous roots and its relationships with bulk density and soil penetration resistance. The study was carried out in 22 fenced areas grazed under different intensities (animal stocking rates: 0.19-15.76 AU ha−1). Undisturbed soil core and bulk samples were collected at 3 depth intervals in order to determine select soil properties (texture, organic matter content, and bulk density). Additionally, soil penetration resistance was quantified at 890 random points at different depths and soil moisture contents. Frequency of herbaceous roots was estimated for each soil horizon in 47 soil profiles and categorized into 4 classes: none, few, common and many. Results showed negative relationships between bulk density (> 10 cm depth) and the content of soil organic matter from 0 to 5 cm (r =−0.061, p < 0.05) and 5-10 m depth (r = −0.824, p < 0.005). Furthermore, a tendency for decreasing mean values of soil penetration resistance as the frequency of herbaceous roots increased was also observed. The values observed confirm that soil compaction provoked by an excessive number of animals reduced the quantity of herbaceous roots. The value of 2 MPa traditionally accepted as restrictive for root growth is discussed. Findings presented here could be of interest for policy makers and farm owners to guide decisions about optimum animal stocking rates.
dc.language.iso	eng
dc.relation.ispartof	Catena, 2017, num. 158, p. 381-389
dc.subject	Sòls Erosió
dc.title	Reduction of the frequency of herbaceous roots as an effect of soil compaction induced by heavy grazing in rangelands of SW Spain
dc.type	journal article	es_ES
dc.date.updated	2018-04-18T10:54:12Z
dc.identifier.doi	10.1016/j.catena.2017.07.019
dc.identifier.idgrec	125661
dc.rights.accessRights	open access	es_ES