INVESTIGADORES
OLIVERA Nelda Lila
congresos y reuniones científicas
Título:
EFFECT OF SOIL MOISTURE AND PLANT LITTERFALL QUALITY ON THE NITRIFYING ACTIVITY OF ARID SOILS FROM THE PATAGONIAN MONTE
Autor/es:
MAGALÍ MARCOS; MÓNICA BERTILLER; NELDA LILA OLIVERA
Lugar:
Mar del Plata
Reunión:
Congreso; X Congreso Argentino de Microbiología General SAMIGE; 2014
Institución organizadora:
SAMIGE
Resumen:
Water availability has a major influence on nutrient cycling; particularly in arid and semiarid ecosystems were rainfall events are scarce. In addition, the composition of plant cover through the quantity and chemical quality of its litterfall, which is altered by selective grazing, influences the input of nutrients into the soil and the nutrient cycling. The aim of this study was to analyze the effect of both soil moisture and plant litter quality from sites with different grazing disturbances on the nitrifying activity of arid soils from the Patagonian Monte. Upper soil samples associated to vegetated patches were collected at two sites with different signs of grazing disturbance (DS: disturbed site; CS: conserved site) within the Wildlife Refuge ?La Esperanza? (42°12?S, 64°58?W). Then, samples of each site were pooled in a composite sample. Aliquots of the composite sample were used to assess soil moisture, pH and texture. Also, the concentration of organic C was measured by wet combustion (8.69±0.79 mg/g dry soil) and the concentration of total N by the semi-micro Kjeldahl technique (0.71±0.03 mg/g dry soil). In addition, plant litterfall samples were collected at each site. Both litter samples differed significantly (p