Content and carbon stocks in labile and recalcitrant organic matter of the soil under crop-livestock integration in Cerrado
| Autor: | Itaynara Batista, Marcos Gervasio Pereira, Maria Elizabeth Fernandes Correia, Wanderlei Bieluczyk, Jolimar Antônio Schiavo, Janaína Ribeiro Costa Rows |
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| Jazyk: | English<br />Portuguese |
| Rok vydání: | 2013 |
| Předmět: |
The study of organic matter and its compartments and their relationship with management
aims to develop strategies for increasing their levels in soils and better understanding of its dynamics. This work aimed to evaluate the fractions of soil organic matter and their carbon stocks in different soil cover system in crop-livestock integration and native Cerrado vegetation. The study was conducted at the farm Cabeceira Maracajú – MS sample area have the following history: soybean/corn + brachiaria/cotton/oat + pasture/soybean/formation of pasture/grazing sampling was carried out in two seasons dry (May/2009) and rainy (March 2010) in the dry season crops present were: pasture corn and cotton + brachiaria and in the rainy season were corn cotton and soybeans so the areas in the two evaluation periods were: pasture / maize + brachiaria / cotton cotton / soybean area and a native of Savanna. Was performed to determine the exchangeable cations particle size analysis bulk density organic carbon particle size fractionation of organic matter of the soil with the quantification of particulate organic carbon (POC) and organic carbon associated with minerals (OCam). Was also quantified the carbon stock and size fractions. The area of pasture / maize showed higher carbon stock in the particulate fraction in the topsoil. The area of cotton / soy due to its lower clay showed the greatest loss of carbon. Because of the areas have the same history the stock of more recalcitrant fraction was not sensitive to variations in coverage. The POC fraction appears more sensitive to different soil covers and seasonality Particle size fractionation Seasonality Management Agriculture (General) S1-972 |
| Zdroj: | Semina: Ciências Agrárias, Vol 34, Iss 6Supl1, Pp 3377-3388 (2013) |
| Druh dokumentu: | article |
| ISSN: | 1679-0359 1676-546X |
| DOI: | 10.5433/1679-0359.2013v34n6Supl1p3377 |
| Popis: | The study of organic matter and its compartments and their relationship with management, aims to develop strategies for increasing their levels in soils and better understanding of its dynamics. This work aimed to evaluate the fractions of soil organic matter and their carbon stocks in different soil cover system in crop-livestock integration and native Cerrado vegetation. The study was conducted at the farm Cabeceira, Maracajú – MS, sample area have the following history: soybean/corn + brachiaria/cotton/oat + pasture/soybean/formation of pasture/grazing, sampling was carried out in two seasons, dry (May/2009) and rainy (March 2010), in the dry season, crops present were: pasture, corn and cotton + brachiaria and in the rainy season were corn, cotton and soybeans, so the areas in the two evaluation periods were: pasture / maize + brachiaria / cotton, cotton / soybean area and a native of Savanna. Was performed to determine the exchangeable cations, particle size analysis, bulk density, organic carbon, particle size fractionation of organic matter of the soil with the quantification of particulate organic carbon (POC) and organic carbon associated with minerals (OCam). Was also quantified the carbon stock and size fractions. The area of pasture / maize showed higher carbon stock in the particulate fraction in the topsoil. The area of cotton / soy due to its lower clay, showed the greatest loss of carbon. Because of the areas have the same history, the stock of more recalcitrant fraction was not sensitive to variations in coverage. The POC fraction appears more sensitive to different soil covers and seasonality. |
| Databáze: | Directory of Open Access Journals |
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