Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization
In most temperate forest, nitrogen [N] is considered a limiting factor. This becomes important in extreme environments, as Nothofagus antarctica forests, where the antecedents are scarce. Thinning practices in N. antarctica forests for silvopastoral uses may modify the soil N dynamics. Therefore, the objective of this work was to evaluate the temporal variation of soil N in these ecosystems. The mineral extractable soil N, net nitrification and net N mineralization were evaluated under different crown cover and two site quality stands. The mineral N extractable [NH4 +-N + NO3 --N] was measured periodically. Net nitrification and net N mineralization were estimated through the technique of incubation of intact samples with tubes. The total mineral extractable N concentration varied between crown cover and dates, with no differences among site classes. The lowest and highest values were found in the minimal and intermediate crown cover, respectively. In the higher site quality stand, the annual net N mineralization was lower in the minimal crown cover reaching 11 kg N ha-1 year-1, and higher in the maximal crown cover [54 kg N ha-1 year-1]. In the lower site quality stand there was no differences among crown cover. The same pattern was found for net nitrification. Thinning practices for silvopastoral use of these forests, keeping intermediate crown cover values, did not affect both N mineralization and nitrification. However, the results suggest that total trees removal from the ecosystem may decrease N mineralization and nitrification.
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Subjects: | FOREST SOIL, ÑIRE, NITROGEN DYNAMIC, PATAGONIA, SILVOPASTORAL SYSTEM, CANOPY ARCHITECTURE, CONCENTRATION [COMPOSITION], DECIDUOUS TREE, LIMITING FACTOR, MINERALIZATION, NITRIFICATION, NITROGEN COMPOUND, NITROGEN CYCLE, NUTRIENT DYNAMICS, PASTURE, SOIL NITROGEN, STAND STRUCTURE, TEMPERATE FOREST, TEMPORAL VARIATION, THINNING, NOTHOFAGUS ANTARCTICA, |
Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46962 |
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KOHA-OAI-AGRO:469622023-10-12T13:03:36Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46962AAGSilvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralizationBahamonde, Héctor A.Peri, Pablo LuisAlvarez, R.Barneix, Atilio JoséMoretto, Alicia S.Martínez Pastur, Guillermo Josétextengapplication/pdfIn most temperate forest, nitrogen [N] is considered a limiting factor. This becomes important in extreme environments, as Nothofagus antarctica forests, where the antecedents are scarce. Thinning practices in N. antarctica forests for silvopastoral uses may modify the soil N dynamics. Therefore, the objective of this work was to evaluate the temporal variation of soil N in these ecosystems. The mineral extractable soil N, net nitrification and net N mineralization were evaluated under different crown cover and two site quality stands. The mineral N extractable [NH4 +-N + NO3 --N] was measured periodically. Net nitrification and net N mineralization were estimated through the technique of incubation of intact samples with tubes. The total mineral extractable N concentration varied between crown cover and dates, with no differences among site classes. The lowest and highest values were found in the minimal and intermediate crown cover, respectively. In the higher site quality stand, the annual net N mineralization was lower in the minimal crown cover reaching 11 kg N ha-1 year-1, and higher in the maximal crown cover [54 kg N ha-1 year-1]. In the lower site quality stand there was no differences among crown cover. The same pattern was found for net nitrification. Thinning practices for silvopastoral use of these forests, keeping intermediate crown cover values, did not affect both N mineralization and nitrification. However, the results suggest that total trees removal from the ecosystem may decrease N mineralization and nitrification.In most temperate forest, nitrogen [N] is considered a limiting factor. This becomes important in extreme environments, as Nothofagus antarctica forests, where the antecedents are scarce. Thinning practices in N. antarctica forests for silvopastoral uses may modify the soil N dynamics. Therefore, the objective of this work was to evaluate the temporal variation of soil N in these ecosystems. The mineral extractable soil N, net nitrification and net N mineralization were evaluated under different crown cover and two site quality stands. The mineral N extractable [NH4 +-N + NO3 --N] was measured periodically. Net nitrification and net N mineralization were estimated through the technique of incubation of intact samples with tubes. The total mineral extractable N concentration varied between crown cover and dates, with no differences among site classes. The lowest and highest values were found in the minimal and intermediate crown cover, respectively. In the higher site quality stand, the annual net N mineralization was lower in the minimal crown cover reaching 11 kg N ha-1 year-1, and higher in the maximal crown cover [54 kg N ha-1 year-1]. In the lower site quality stand there was no differences among crown cover. The same pattern was found for net nitrification. Thinning practices for silvopastoral use of these forests, keeping intermediate crown cover values, did not affect both N mineralization and nitrification. However, the results suggest that total trees removal from the ecosystem may decrease N mineralization and nitrification.FOREST SOILÑIRENITROGEN DYNAMICPATAGONIASILVOPASTORAL SYSTEMCANOPY ARCHITECTURECONCENTRATION [COMPOSITION]DECIDUOUS TREELIMITING FACTORMINERALIZATIONNITRIFICATIONNITROGEN COMPOUNDNITROGEN CYCLENUTRIENT DYNAMICSPASTURESOIL NITROGENSTAND STRUCTURETEMPERATE FORESTTEMPORAL VARIATIONTHINNINGNOTHOFAGUS ANTARCTICAAgroforestry Systems |
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FOREST SOIL ÑIRE NITROGEN DYNAMIC PATAGONIA SILVOPASTORAL SYSTEM CANOPY ARCHITECTURE CONCENTRATION [COMPOSITION] DECIDUOUS TREE LIMITING FACTOR MINERALIZATION NITRIFICATION NITROGEN COMPOUND NITROGEN CYCLE NUTRIENT DYNAMICS PASTURE SOIL NITROGEN STAND STRUCTURE TEMPERATE FOREST TEMPORAL VARIATION THINNING NOTHOFAGUS ANTARCTICA FOREST SOIL ÑIRE NITROGEN DYNAMIC PATAGONIA SILVOPASTORAL SYSTEM CANOPY ARCHITECTURE CONCENTRATION [COMPOSITION] DECIDUOUS TREE LIMITING FACTOR MINERALIZATION NITRIFICATION NITROGEN COMPOUND NITROGEN CYCLE NUTRIENT DYNAMICS PASTURE SOIL NITROGEN STAND STRUCTURE TEMPERATE FOREST TEMPORAL VARIATION THINNING NOTHOFAGUS ANTARCTICA |
spellingShingle |
FOREST SOIL ÑIRE NITROGEN DYNAMIC PATAGONIA SILVOPASTORAL SYSTEM CANOPY ARCHITECTURE CONCENTRATION [COMPOSITION] DECIDUOUS TREE LIMITING FACTOR MINERALIZATION NITRIFICATION NITROGEN COMPOUND NITROGEN CYCLE NUTRIENT DYNAMICS PASTURE SOIL NITROGEN STAND STRUCTURE TEMPERATE FOREST TEMPORAL VARIATION THINNING NOTHOFAGUS ANTARCTICA FOREST SOIL ÑIRE NITROGEN DYNAMIC PATAGONIA SILVOPASTORAL SYSTEM CANOPY ARCHITECTURE CONCENTRATION [COMPOSITION] DECIDUOUS TREE LIMITING FACTOR MINERALIZATION NITRIFICATION NITROGEN COMPOUND NITROGEN CYCLE NUTRIENT DYNAMICS PASTURE SOIL NITROGEN STAND STRUCTURE TEMPERATE FOREST TEMPORAL VARIATION THINNING NOTHOFAGUS ANTARCTICA Bahamonde, Héctor A. Peri, Pablo Luis Alvarez, R. Barneix, Atilio José Moretto, Alicia S. Martínez Pastur, Guillermo José Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
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In most temperate forest, nitrogen [N] is considered a limiting factor. This becomes important in extreme environments, as Nothofagus antarctica forests, where the antecedents are scarce. Thinning practices in N. antarctica forests for silvopastoral uses may modify the soil N dynamics. Therefore, the objective of this work was to evaluate the temporal variation of soil N in these ecosystems. The mineral extractable soil N, net nitrification and net N mineralization were evaluated under different crown cover and two site quality stands. The mineral N extractable [NH4 +-N + NO3 --N] was measured periodically. Net nitrification and net N mineralization were estimated through the technique of incubation of intact samples with tubes. The total mineral extractable N concentration varied between crown cover and dates, with no differences among site classes. The lowest and highest values were found in the minimal and intermediate crown cover, respectively. In the higher site quality stand, the annual net N mineralization was lower in the minimal crown cover reaching 11 kg N ha-1 year-1, and higher in the maximal crown cover [54 kg N ha-1 year-1]. In the lower site quality stand there was no differences among crown cover. The same pattern was found for net nitrification. Thinning practices for silvopastoral use of these forests, keeping intermediate crown cover values, did not affect both N mineralization and nitrification. However, the results suggest that total trees removal from the ecosystem may decrease N mineralization and nitrification. |
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Texto |
topic_facet |
FOREST SOIL ÑIRE NITROGEN DYNAMIC PATAGONIA SILVOPASTORAL SYSTEM CANOPY ARCHITECTURE CONCENTRATION [COMPOSITION] DECIDUOUS TREE LIMITING FACTOR MINERALIZATION NITRIFICATION NITROGEN COMPOUND NITROGEN CYCLE NUTRIENT DYNAMICS PASTURE SOIL NITROGEN STAND STRUCTURE TEMPERATE FOREST TEMPORAL VARIATION THINNING NOTHOFAGUS ANTARCTICA |
author |
Bahamonde, Héctor A. Peri, Pablo Luis Alvarez, R. Barneix, Atilio José Moretto, Alicia S. Martínez Pastur, Guillermo José |
author_facet |
Bahamonde, Héctor A. Peri, Pablo Luis Alvarez, R. Barneix, Atilio José Moretto, Alicia S. Martínez Pastur, Guillermo José |
author_sort |
Bahamonde, Héctor A. |
title |
Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
title_short |
Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
title_full |
Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
title_fullStr |
Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
title_full_unstemmed |
Silvopastoral use of Nothofagus antarctica in Southern Patagonian forests, influence over net nitrogen soil mineralization |
title_sort |
silvopastoral use of nothofagus antarctica in southern patagonian forests, influence over net nitrogen soil mineralization |
url |
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46962 |
work_keys_str_mv |
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1781851267120758784 |