Soil microbial processes in a pine silvopastoral system in NW Patagonia
The conversion of native vegetation to tree plantation (afforestation) implies a drastic change in life forms and as a consequence, changes in the microenvironmental conditions, and the quantity and quality of organic matter entering the soil.This could affect soil microbial communities and the proc...
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/2185 https://link.springer.com/article/10.1007/s10457-018-0210-1 https://doi.org/10.1007/s10457-018-0210-1 |
| _version_ | 1855034918294257664 |
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| author | Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara Maria Caballe, Gonzalo |
| author_browse | Bahamonde, Héctor Alejandro Caballe, Gonzalo Fariña, Clara Maria Gonzalez Polo, Marina Mazzarino, María Julia Peri, Pablo Luis |
| author_facet | Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara Maria Caballe, Gonzalo |
| author_sort | Gonzalez Polo, Marina |
| collection | INTA Digital |
| description | The conversion of native vegetation to tree plantation (afforestation) implies a drastic change in life forms and as a consequence, changes in the microenvironmental conditions, and the quantity and quality of organic matter entering the soil.This could affect soil microbial communities and the processes catalyzed by them. In Patagonia, afforestation with exotic, fast-growing tree species was a common practice but the consequences on the ecosystem remain poorly quantified. The objective was to study the effects of pine afforestation on litter decomposition, soil organic matter, soil microbial activity and associated biogeochemical functions in a semiarid area of NW Patagonia. We hypothesized
that afforestation would decrease litter decomposition rate and soil biological activity including net N mineralization, due to changes of environmental
conditions and organic matter quality. We measured in situ and potential soil net N mineralization, soil microbial biomass-C, soil enzyme activities (β-glucosidase, acid phosphatase and leucin-aminopeptidase) and litter decomposition rate. We also characterized soil pH, electrical conductivity, extractable P and total C and N. Pine plantations clearly affected decomposition rates of native grass
vegetation, which was 10% lower under pine canopy cover, and decreased soil microbial biomass. Acid phosphatase activity and leucin-aminopeptidase
activities were also marginally reduced. On the other hand, we did not find any significant effects of pines on soil chemical properties and N transformations
after 13 years of plantation. Because effects depend strongly on time, the decrease of soil microbial biomass, acid phosphatase activity and grass decomposition rate (and the trend to lower enzyme activities related to P and N) under pine cover could be an evidence of possible changes on the long-term. |
| format | info:ar-repo/semantics/artículo |
| id | INTA2185 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA21852019-03-21T18:56:13Z Soil microbial processes in a pine silvopastoral system in NW Patagonia Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara Maria Caballe, Gonzalo Biología del Suelo Sistemas Silvopascícolas Pinus Microorganismos del Suelo Silvopastoral Systems Soil Biology Soil Microorganisms Región Patagónica Sistemas Silvopastoriles Pino The conversion of native vegetation to tree plantation (afforestation) implies a drastic change in life forms and as a consequence, changes in the microenvironmental conditions, and the quantity and quality of organic matter entering the soil.This could affect soil microbial communities and the processes catalyzed by them. In Patagonia, afforestation with exotic, fast-growing tree species was a common practice but the consequences on the ecosystem remain poorly quantified. The objective was to study the effects of pine afforestation on litter decomposition, soil organic matter, soil microbial activity and associated biogeochemical functions in a semiarid area of NW Patagonia. We hypothesized that afforestation would decrease litter decomposition rate and soil biological activity including net N mineralization, due to changes of environmental conditions and organic matter quality. We measured in situ and potential soil net N mineralization, soil microbial biomass-C, soil enzyme activities (β-glucosidase, acid phosphatase and leucin-aminopeptidase) and litter decomposition rate. We also characterized soil pH, electrical conductivity, extractable P and total C and N. Pine plantations clearly affected decomposition rates of native grass vegetation, which was 10% lower under pine canopy cover, and decreased soil microbial biomass. Acid phosphatase activity and leucin-aminopeptidase activities were also marginally reduced. On the other hand, we did not find any significant effects of pines on soil chemical properties and N transformations after 13 years of plantation. Because effects depend strongly on time, the decrease of soil microbial biomass, acid phosphatase activity and grass decomposition rate (and the trend to lower enzyme activities related to P and N) under pine cover could be an evidence of possible changes on the long-term. EEA Bariloche Fil: Gonzalez Polo, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Reg.universidad Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente; Argentina Fil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Mazzarino, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Reg.universidad Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente; Argentina Fil: Fariña, Clara Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Caballe, Gonzalo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina 2018-04-06T12:08:39Z 2018-04-06T12:08:39Z 2018-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/2185 https://link.springer.com/article/10.1007/s10457-018-0210-1 0167-4366 (Print) 1572-9680 (Online) https://doi.org/10.1007/s10457-018-0210-1 eng info:eu-repo/semantics/restrictedAccess application/pdf Patagonia (general region) Agroforestry systems 93 (1) : 255–266 (February 2019) |
| spellingShingle | Biología del Suelo Sistemas Silvopascícolas Pinus Microorganismos del Suelo Silvopastoral Systems Soil Biology Soil Microorganisms Región Patagónica Sistemas Silvopastoriles Pino Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara Maria Caballe, Gonzalo Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title | Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title_full | Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title_fullStr | Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title_full_unstemmed | Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title_short | Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| title_sort | soil microbial processes in a pine silvopastoral system in nw patagonia |
| topic | Biología del Suelo Sistemas Silvopascícolas Pinus Microorganismos del Suelo Silvopastoral Systems Soil Biology Soil Microorganisms Región Patagónica Sistemas Silvopastoriles Pino |
| url | http://hdl.handle.net/20.500.12123/2185 https://link.springer.com/article/10.1007/s10457-018-0210-1 https://doi.org/10.1007/s10457-018-0210-1 |
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