Artículo
Do soil enzymes respond to long-term grazing in an arid ecosystem?
Olivera, Nelda Lila
; Prieto, Luciano Hernan
; Carrera, Analía Lorena
; Saravi Cisneros, Hebe
; Bertiller, Monica Beatriz
Fecha de publicación:
07/01/2014
Editorial:
Springer
Revista:
Plant and Soil
ISSN:
0032-079X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Background and aims Ourobjectivewastoassessthe effects of long-term continuous grazing on soil enzyme activities in relation to shifts in plant litter attributes and soil resources in an arid ecosystem, considering both spatial and temporal variations. Methods We randomly extracted soil samples with the respective litter cover at 5 modal size plant-covered patches (PCP) and the nearest inter-canopy areas (IC) at Patagonian Monte sites with low, medium and high grazing intensity in winter and summer from 2007 to 2009. We analyzed enzyme activities (dehydrogenase, ß-glucosidase, protease, alkaline and acid phosphatase), microbial biomass-C, organic-C, total soil-N, and moisture in soil and mass and quality in plant litter. We assessed faeces density and plant cover in the field. Results and conclusions Grazing led to reduced grass cover, decreasing plant litter mass with increasing soluble phenolics, and reduced phosphatases, ß-glucosidase and microbial biomass-C at PCP. A localized nutrient input from animal excreta seems to promote microbial biomass-C, alkaline phosphatase and dehydrogenase activities but only at IC from the site with high grazing intensity. Plant heterogeneous distribution, plant litter quantity and quality, nutrient inputs from grazers and seasonal variation in soil moisture, also affecting soil resources and microbial biomass, modulate soil enzyme responses to long-term grazing in the arid Patagonian Monte.
Palabras clave:
Arid Ecosystems
,
Grazing
,
Plant Litter
,
Soil Enzymes
,
Microbial Biomass
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT-CENPAT)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CENPAT
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CENPAT
Citación
Olivera, Nelda Lila; Prieto, Luciano Hernan; Carrera, Analía Lorena; Saravi Cisneros, Hebe; Bertiller, Monica Beatriz; Do soil enzymes respond to long-term grazing in an arid ecosystem?; Springer; Plant and Soil; 378; 1; 7-1-2014; 35-48
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