CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil
| Autor: | Arminda Moreira de Carvalho, K. Pulrolnik, Alexsandra Duarte de Oliveira, Luciano de Almeida Pinheiro, Diana Regazzi Zuim, João Paulo Guimarães Soares, Fabiana Piontekowski Ribeiro, Alcides Gatto, Juaci Vitória Malaquias, Eloisa Aparecida Belleza Ferreira |
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| Přispěvatelé: | ALEXSANDRA DUARTE DE OLIVEIRA, CPAC, FABIANA PIONTEKOWSKI RIBEIRO, UNB, ELOISA APARECIDA BELLEZA FERREIRA, Cenargen, JUACI VITORIA MALAQUIAS, CPAC, ALCIDES GATTO, UNB, DIANA REGAZZI ZUIM, CPAC, LUCIANO DE ALMEIDA PINHEIRO, SGE, KARINA PULROLNIK, CPAC, JOAO PAULO GUIMARAES SOARES, CPAC, ARMINDA MOREIRA DE CARVALHO, CPAC. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Agriculture (General) Efeito Estufa forest stand age 01 natural sciences S1-972 Flux (metallurgy) greenhouse gases Greenhouse gas emissions medicine Ecosystem Solo Florestal Eucalyptus Nitrous oxide Land use Forestry Cerrado 04 agricultural and veterinary sciences Vegetation Seasonality medicine.disease savanna Metano Greenhouse gas Soil water Eucalipto 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Óxido nitroso 010606 plant biology & botany |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA Scientia Agricola, Vol 78, Iss 1 (2020) Scientia Agricola, Volume: 78, Issue: 1, Article number: e20180355, Published: 13 MAR 2020 Scientia Agricola v.78 n.1 2021 Scientia Agrícola Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1678-992X |
| Popis: | Forest soils are N2O sources and commonly act as CH4 sinks. This study evaluated the dynamics of the CH4 and N2O fluxes of soils under Eucalyptus plantations and native Cerrado vegetation, as well as possible interactions between environmental factors and fluxes. The study was carried out in the Distrito Federal, Brazil, during 26 months, in three areas: in two stands of the hybrid Eucalyptus urophylla × Eucalyptus grandis, planted in 2011 (E1), and in 2009 (E2) and native Cerrado vegetation (CE). Measurements to determine the fluxes in a closed static chamber were carried out from Oct 2013 to Nov 2015. Soil and climate factors were monitored. During the study period, the mean CH4 fluxes were ?22.48, ?8.38 and ?1.31 μg CH4 m?2 h?1 and the mean N2O fluxes 5.45, 4.85 and 3.85 μg N2O m?2 h?1 from E1, E2 and CE, respectively. Seasonality affected plantations in the studied sites. Cumulative CH4 influxes were calculated (year-1: ?1.86 to -0.63 kg ha?1 yr?1; year-2: ?1.85 to ?1.34 kg ha?1 yr?1). Cumulative N2O fluxes in the three sites were ≤ 0.85 kg ha?1 yr?1. The change in land use from Cerrado to Eucalyptus plantations did not significantly changed regarding greenhouse gases (GHG), compared to the native vegetation. Flux rates of both gases (N2O and CH4) were low. Temporal variations in GHG fluxes and different ages of the stands did not cause significant differences in cumulative annual fluxes. Made available in DSpace on 2020-03-19T14:32:20Z (GMT). No. of bitstreams: 1 1678-992X-sa-78-01-e20180355.pdf: 701028 bytes, checksum: b25af9da390a7b276a4b47421b19e35b (MD5) Previous issue date: 2021 Epub Mar 13, 2020 |
| Databáze: | OpenAIRE |
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