Above- and belowground carbon stocks of two organic,agroforestry-based oil palm production systems in eastern Amazonia |
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Authors: | Helen Monique Nascimento Ramos Steel Silva Vasconcelos Osvaldo Ryohei Kato Débora Cristina Castellani |
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Institution: | 1.Graduate Program in Agronomy,Federal Rural University of Amazonia,Belém,Brazil;2.Embrapa Eastern Amazon,Belém,Brazil;3.Natura Inova??o e Tecnologias de Produtos Ltda,Cajamar,Brazil |
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Abstract: | Ecosystem-level assessments of carbon (C) stocks of agroforestry systems are scarce. We quantified the ecosystem-level C stocks of one agroforestry-based oil palm production system (AFSP) and one agroforestry-based oil palm and cacao production system (AFSP+C) in eastern Amazonia. We quantified the stocks of C in four pools: aboveground live biomass, litter, roots, and soil. We evaluated the distribution of litter, roots, and soil C stocks in the oil palm management zones and in the area planted with cacao and other agroforestry species. The ecosystem-C stock was higher in AFSP+C (116.7 ± 1.5 Mg C ha?1) than in AFSP (99.1 ± 3.1 Mg C ha?1). The total litter-C stock was higher in AFSP+C (3.27 ± 0.01 Mg C ha?1) than in AFSP (2.26 ± 0.06 Mg C ha?1). Total root and soil C stocks (0–30 cm) did not differ between agroforestry systems. Ecosystem-C stocks varied between agroforestry systems due to differences in both aboveground and belowground stocks. In general, the belowground-C stocks varied spatially in response to the management in the oil palm and non-oil palm strips; these results have important implications for the monitoring of ecosystem-level C dynamics and the refinement of soil management. |
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