Impact of pasture, agriculture and crop-livestock systems on soil C stocks in Brazil
| Autor: | Brigitte Josefine Feigl, Carlos Eduardo Pellegrino Cerri, Martial Bernoux, Carlos Clemente Cerri, Flávio Jesus Wruck, Guilherme Silva Raucci, João Luís Nunes Carvalho |
|---|---|
| Přispěvatelé: | Departamento de Ciência do Solo, Universidade de São Paulo (USP), Laboratorio de Biogeoquímica Ambiental, Ecologie Fonctionnelle et Biogéochimie des Sols (Eco&Sols), Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M), Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA), Empresa Brasileira de Pesquisa Agropecuária (Embrapa), Ministério da Agricultura, Pecuária e Abastecimento [Brasil] (MAPA), Governo do Brasil-Governo do Brasil, project CAPES/COFECUB SV552/07, Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Fundo de lncentivo a Cultura do Algodao do Estado de Goias (FIALGO) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
Land management Soil Science 010501 environmental sciences Carbon sequestration limiting water range 01 natural sciences Pasture atlantic forest Amazonia Agricultural land Crop-livestock systems Land use change 0105 earth and related environmental sciences Earth-Surface Processes 2. Zero hunger geography geography.geographical_feature_category region biology Land use business.industry Agroforestry Crop-livestock native cerrado organic-carbon sequestration grassland management nitrogen stocks Cerrado 04 agricultural and veterinary sciences 15. Life on land Sorghum biology.organism_classification greenhouse-gas emissions matter brachiaria pastures Soil carbon stock Agronomy 13. Climate action Agriculture 040103 agronomy & agriculture tillage 0401 agriculture forestry and fisheries Environmental science systems Soil fertility business Agronomy and Crop Science |
| Zdroj: | Soil and Tillage Research Soil and Tillage Research, Elsevier, 2010, 110 (1), pp.175-186. ⟨10.1016/j.still.2010.07.011⟩ |
| ISSN: | 0167-1987 |
| DOI: | 10.1016/j.still.2010.07.011⟩ |
| Popis: | Amsterdam; International audience; Changes in land use can result in either sources or sinks of atmospheric carbon (C), depending on management practices. In Brazil, significant changes in land use result from the conversion of native vegetation to pasture and agriculture, conversion of pasture to agriculture and, more recently, the conversion of pasture and agriculture to integrated crop-livestock systems (ICL). The ICL system proposes a diversity of activities that include the strategic incorporation of pastures to agriculture so as to benefit both. In agricultural areas, for example, the implementation of ICL requires the production of quality forage for animals between crops as well as the production of straw to facilitate the sustainability of the no-tillage (NT) management system. The objective of this study was to evaluate the modifications in soil C stocks resulting from the main processes involved in the changes of land use in Amazonia and Cerrado biomes. For comparison purposes, areas under native vegetation, pastures, crop succession and ID. under different edapho-climatic conditions in Amazonia and Cerrado biomes were evaluated. This study demonstrated that the conversion of native vegetation to pasture can cause the soil to function either as a source or a sink of atmospheric CO(2), depending on the land management applied. Non-degraded pasture under fertile soil showed a mean accumulation rate of 0.46 g ha(-1) year(-1). Carbon losses from pastures implemented in naturally low fertile soil ranged from 0.15 to 1.53 Mg ha(-1) year(-1), respectively, for non-degraded and degraded pasture. The conversion of native vegetation to agriculture in areas under the ICL system, even when cultivated under NT, resulted in C losses of 1.31 in six years and of 0.69 Mg ha(-1) in 21 years. The conversion of a non-degraded pasture to cropland (soybean/sorghum) released, in average, 1.44 Mg of C ha(-1)year(-1)to the atmosphere. The ICL system in agricultural areas has shown evidences that it always functions as a sink of C with accumulation rates ranging from 0.82 to 2.58 Mg ha(-1) year(-1). The ICL produces soil C accumulation and, as a consequence, reduces atmospheric CO(2) in areas formerly cultivated under crop succession. However, the magnitude of C accumulation in soil depends on factors such as the types of crops, the edapho-climatic conditions and the amount of time the area is under ICE |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect