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 pr...
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| Formato: | Articulo article acceptedVersion |
| Lenguaje: | Inglés |
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2018
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| Acceso en línea: | http://rdi.uncoma.edu.ar/handle/uncomaid/17309 |
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I22-R178-uncomaid-173092023-10-17T18:00:06Z 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 María Caballé, Gonzalo Afforestation Pinus sp. Net nitrogen mineralization Soil organic carbon Descomposition rate Ciencias Agrarias y Forestales 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. Fil: Gonzalez Polo, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Gonzalez Polo, Marina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Fil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnologia Agropecuaria. Estación Experimental Agropecuaria Rio Gallegos; Argentina. Fil: Bahamonde, Héctor Alejandro. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnologia Agropecuaria. Estación Experimental Agropecuaria Rio Gallegos; Argentina. Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Mazzarino, María Julia. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Fil: Mazzarino, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Fariña, Clara María. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Bariloche; Argentina. Fil: Caballé, Gonzalo. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Bariloche; Argentina. 2018-02-14 2023-07-04T14:41:58Z 2023-07-04T14:41:58Z Articulo article acceptedVersion 1572-9680 http://rdi.uncoma.edu.ar/handle/uncomaid/17309 eng https://link.springer.com/article/10.1007/s10457-018-0210-1 Atribución-NoComercial-CompartirIgual 2.5 Argentina https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ application/pdf pp. 255–266 application/pdf Springer Agroforestry Systems. Vol. 93 (2019) |
| institution |
Universidad Nacional del Comahue |
| institution_str |
I-22 |
| repository_str |
R-178 |
| collection |
Repositorio Institucional UNCo |
| language |
Inglés |
| topic |
Afforestation Pinus sp. Net nitrogen mineralization Soil organic carbon Descomposition rate Ciencias Agrarias y Forestales |
| spellingShingle |
Afforestation Pinus sp. Net nitrogen mineralization Soil organic carbon Descomposition rate Ciencias Agrarias y Forestales Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara María Caballé, Gonzalo Soil microbial processes in a pine silvopastoral system in NW Patagonia |
| topic_facet |
Afforestation Pinus sp. Net nitrogen mineralization Soil organic carbon Descomposition rate Ciencias Agrarias y Forestales |
| 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 |
Articulo article acceptedVersion |
| author |
Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara María Caballé, Gonzalo |
| author_facet |
Gonzalez Polo, Marina Bahamonde, Héctor Alejandro Peri, Pablo Luis Mazzarino, María Julia Fariña, Clara María Caballé, Gonzalo |
| author_sort |
Gonzalez Polo, Marina |
| title |
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_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_sort |
soil microbial processes in a pine silvopastoral system in nw patagonia |
| publisher |
Springer |
| publishDate |
2018 |
| url |
http://rdi.uncoma.edu.ar/handle/uncomaid/17309 |
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| _version_ |
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