Soil microbial structure and activity in a semiarid rangeland of Patagonia, Argentina plant species and defoliation effects
Natural grasslands are an important renewable resource for livestock production. Grazing in these areas alters the plant community composition, litter quality, and soil microbial structure and activity. Three cool-season species were studied in a semiarid rangeland area of Argentina: Poa ligularis a...
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| Formato: | Artículo |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2021ambrosino.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 024 | |a 10.1016/j.rhisph.2021.100382 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 245 | 1 | 0 | |a Soil microbial structure and activity in a semiarid rangeland of Patagonia, Argentina |b plant species and defoliation effects |
| 520 | |a Natural grasslands are an important renewable resource for livestock production. Grazing in these areas alters the plant community composition, litter quality, and soil microbial structure and activity. Three cool-season species were studied in a semiarid rangeland area of Argentina: Poa ligularis and Nassella tenuis (desirable/preferred for livestock) and Amelichloa ambigua (undesirable/non preferred). The objective was to analyze the effect of moderate defoliation and plant species on the structure and activity of soil microbial communities associated with their roots. In winter 2012, soil samples (0–10 cm) were taken underneath marked plant canopies of the three species (n = 8). Immediately thereafter, half of the plants (n = 4) were defoliated (5 cm stubble height) and the other half remained undefoliated (controls). The defoliation treatment was conducted again in the spring. Soil samples were taken 30 days after each defoliation event. The study was repeated in 2013, using a different plant set. Bacterial community structure and soil microbial activity were analyzed using PCR-DGGE analysis and basal soil respiration, respectively. Moderate and early defoliations allowed compensatory growth in the defoliated plants. Variations in the soil genetic profiles of A. ambigua suggest a higher dependence on its rhizospheric bacterial communities. Defoliation treatments did not substantially affect basal soil respiration but showed strong links between desirable species and soil microbial activity. Sustainable management practices that promote the persistence of these species are important for the development of microbial communities that respond quickly to stress conditions, favoring decomposition processes that maintain soil fertility in semiarid grasslands. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | |a POA LIGULARIS | ||
| 653 | |a NASSELLA TENUIS | ||
| 653 | |a AMELICHLOA AMBIGUA | ||
| 653 | |a NATURAL GRASSLAND | ||
| 653 | |a FORAGE QUALITY | ||
| 653 | |a RHIZOSPHERE | ||
| 700 | 1 | |a Ambrosino, Mariela Lis |u Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Santa Rosa, La Pampa, Argentina. |u CONICET - Universidad Nacional de La Pampa. Santa Rosa, La Pampa, Argentina. |9 73986 | |
| 700 | 1 | |a Montecchia, Marcela Susana |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Microbiología Agrícola. Buenos Aires, Argentina. |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina. |9 48352 | |
| 700 | |a Torres, Yanina Alejandra |u Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC), Buenos Aires, Argentina. |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Buenos Aires, Argentina. |9 50733 | ||
| 700 | 1 | |a Ithurrart, Leticia Soledad |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Buenos Aires, Argentina. |9 50735 | |
| 700 | 1 | |a Lucero, Cinthia Tamara |u Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Santa Rosa, La Pampa, Argentina. |u CONICET - Universidad Nacional de La Pampa. Santa Rosa, La Pampa, Argentina. |9 73987 | |
| 700 | 1 | |a Busso, Carlos Alberto |u Universidad Nacional del Sur (UNS). Departamento de Agronomía. Bahía Blanca, Buenos Aires, Argentina. |u Universidad Nacional del Sur. Departamento de Agronomía. Centro de Recursos Naturales Renovables de las Zonas Semiáridas (CERZOS). Bahía Blanca, Buenos Aires, Argentina. |u CONICET - Universidad Nacional del Sur. Departamento de Agronomía. Centro de Recursos Naturales Renovables de las Zonas Semiáridas (CERZOS). Bahía Blanca, Buenos Aires, Argentina. |9 50732 | |
| 773 | |t Rhizosphere |g Vol.19 (2021), art.100382, 9 p., tbls., grafs. | ||
| 856 | |f 2021ambrosino |i En reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2021ambrosino.pdf |x ARTI202209 | ||
| 856 | |u https://www.elsevier.com/ |z LINK AL EDITOR | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||