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| Hu,FL; Liu,B; Liu,ZM; Fang,YT; Busso,CA. |
| Grasslands are one of the most widespread landscapes worldwide, covering approximately one-fifth of the world's land surface, where grazing is a common practice. How carbon storage responds to grazing in steppes remains poorly understood. We quantified the effects of grazing on community composition and species diversity, and carbon storage in two typical grasslands of northeastern China, one in Horqin and the other one in Hulunbeier. In both grasslands, grazing did not infuence plant species diversity. However, it substantially decreased aboveground carbon by 31% and 54% in Horqin and Hulunbeier, respectively. Fenced and grazing treatments showed a similar belowground carbon at both locations. The predominant carbon pool in the study grassland ecosystem... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Species diversity; Carbon allocation; Carbon stock; Optimal partitioning; Community heterogeneity; Soil depth. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100028 |
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| Lewandrowski, Jan; Peters, Mark; Jones, Carol Adaire; House, Robert M.; Sperow, Mark; Eve, Marlen; Paustian, Keith H.. |
| Atmospheric concentrations of greenhouse gases can be reduced by withdrawing carbon from the atmosphere and sequestering it in soils and biomass. This report analyzes the performance of alternative incentive designs and payment levels if farmers were paid to adopt land uses and management practices that raise soil carbon levels. At payment levels below $10 per metric ton for permanently sequestered carbon, analysis suggests landowners would find it more cost effective to adopt changes in rotations and tillage practices. At higher payment levels, afforestation dominates sequestration activities, mostly through conversion of pastureland. Across payment levels, the economic potential to sequester carbon is much lower than the technical potential reported in... |
| Tipo: Report |
Palavras-chave: Carbon sequestration; Greenhouse gas mitigation; Afforestation; Conservation tillage; No-till; Incentive design; Leakage; Carbon stock; Permanence; Environmental Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/33569 |
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| Wolschick,Neuro Hilton; Barbosa,Fabrício Tondello; Bertol,Ildegardis; Bagio,Bárbara; Kaufmann,Danieli Schneiders. |
| ABSTRACT: The conversion of native grassland into farmland causes changes in the soil. Tillage has profound effects on soil organic matter. The intensification of soil tillage decreases soil quality by reducing aggregate stability. Soil aggregate stability and soil organic matter are key indicators for soil quality and environmental sustainability in agro-ecosystems. The aim of the present study is to evaluate the total organic carbon content and the physical and chemical fractions of the organic matter in a soil under different uses and types of management over 27 years. Four soil tillage treatments with two annual crops were evaluated (no-tillage, NT; rotating tillage, RT; minimum tillage, MT; and conventional tillage, CT), as well as bare soil (BS)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equivalent mass; Carbon stock; Humic substance; Aggregate classes. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100529 |
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| Ferreira, Alexandre Cunha de Barcellos; Borin, Ana Luiza Dias Coelho; Lamas, Fernando Mendes; Bogiani, Julio Cesar; Silva, Mellissa Ananias Soler da; Silva Filho, Joao Luis da; Staut, Luiz Alberto. |
| Sustainable production systems, such as the no-tillage system (NTS), have a tendency to increase organic carbon in the soil. However, in Brazilian cotton production, the conventional tillage system (CTS) is predominant, and long-term studies on cotton crop under the NTS are scarce. The present study aimed to evaluate the effect of soil management and crop rotation systems on the cotton fiber yield as well as on the carbon and nitrogen accumulation in the soil. This study was conducted in the Brazilian savanna over 9 years and consisted of the following four treatments with different soil management systems: the NTS and CTS with the succession or rotation of crops (cotton, soybean, maize, and Urochloa ruziziensis). The NTS increased the carbon content by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; No-tillage; Conventional tillage; Nitrogen; Carbon stock; 5.01.01.06-4. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43039 |
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| GUIMARÃES,MARIA DE FÁTIMA; OLIVEIRA,JOSÉ F. DE; TELLES,TIAGO S.; MACHADO,WALQUÍRIA; BARBOSA,GRAZIELA M.C.; TAVARES FILHO,JOÃO. |
| ABSTRACT Retaining sugarcane straw over the soil after harvesting can improve soil structure and increase soil carbon stabilization, mainly in macroaggregates. We evaluated the carbon content in the aggregate classes in areas under burn and no-burn (adopted for five years) sugarcane management systems, focusing on the superficial layer (0.00-0.20 m). The experiment was carried in an Oxisol and the treatments consisted in burnt sugarcane, manual harvest; burnt sugarcane, mechanized harvest; and no-burn, mechanized harvest. The retention of sugarcane straw on the soil surface is justified by the increase in carbon content and carbon stock in the surface layer (0.00-0.20 m) by restructuring of the soil, even though it cannot match the structure of the soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sugarcane straw; Soil aggregates; Carbon stock; Sand fraction; Soil structure. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502459 |
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| Lopes,Elessandra Laura Nogueira; Fernandes,Antonio Rodrigues; Teixeira,Renato Alves; Sousa,Edna Santos de; Ruivo,Maria de Lourdes Pinheiro. |
| AbstractSoil biological properties have a high potential for use in assessing the impacts of crop systems. The objective of this study is to evaluate the effects of cropping systems on the biological attributes of an oxisol in the Amazonian state of Pará. The treatments consisted of approximately 20-year-old secondary vegetation, recovered pasture, no-tillage systems (NT) maintained for 4 and 8 years after planting with corn (Zea mays L.) and soybean (Glycine max L.), and conventional tillage (CT) systems every 2 years after planting with rice (Oryza sativa L.) and soybean. The microbial biomass to nitrogen ratio was higher in the NT system (0.68 mg kg–1), and the NT system had greater microbial NT8. Thus, the contributions of organic matter from straw... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon stock; No-tillage; Oryza sativa; Glycine max; Zea mays; Amazon region. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000400428 |
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