Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture
Conversions of natural vegetation into pasture can, in a short time, change the carbon stock and the natural abundance of δ13C in the soil. The objective of this study was to evaluate changes in carbon (C) and nitrogen (N) stocks, as well as in the natural abundance of δ13C and δ15N of Argissolo Ver...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Engenharia Sanitária e Ambiental
2021-06-01
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| Series: | Revista Brasileira de Ciências Ambientais |
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| Online Access: | https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/845 |
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| author | Naelmo de Souza Oliveira Jolimar Antonio Schiavo Miriam Ferreira Lima Lais Thomaz Laranjeira Geisielly Pereira Nunes Sidne Canassa da Cruz |
| author_facet | Naelmo de Souza Oliveira Jolimar Antonio Schiavo Miriam Ferreira Lima Lais Thomaz Laranjeira Geisielly Pereira Nunes Sidne Canassa da Cruz |
| author_sort | Naelmo de Souza Oliveira |
| collection | DOAJ |
| description | Conversions of natural vegetation into pasture can, in a short time, change the carbon stock and the natural abundance of δ13C in the soil. The objective of this study was to evaluate changes in carbon (C) and nitrogen (N) stocks, as well as in the natural abundance of δ13C and δ15N of Argissolo Vermelho distrófico (Acrisol), in an area of natural vegetation and planted pasture in the Cerrado region of Aquidauana (MS), Brazil. In order to do this, an area of pasture (PA), cultivated for 25 years with Urochloa brizantha, and an area of natural vegetation (NV) were evaluated. Soil samples were collected at intervals of 0.05 m up to 0.60 m depth, and physical attributes, C and N stocks (CSt and NSt) and isotopic variations of δ13C and δ15N of soil were determined. In the 0–0.05 m layer, the highest C and N stocks occurred in NV, 21.99 and 1.9 Mg ha-1, respectively. In the conversion to PA, 14.62 Mg ha-1 of CSt and 1.36 Mg ha-1 of NSt were lost in the 0–0.05 m layer. The area with PA had greater isotopic enrichment of δ13C in the layers of 0–0.05 and 0.05–0.10 m, with values of -18.3 and -17.4‰, respectively, while in the other layers the isotopic values decreased with the mixture between C of C3 and C4 plants. NV showed enrichment in the isotopic signals, in the layers from 0.25–0.30 m up to 0.40–0.45 m, with values between -21.74 and -21.54‰, respectively, which is characteristic of mixed vegetation of C3 and C4 plants. The values of δ15 N showed isotopic enrichment as depth increased, indicating greater mineralization of soil organic matter in both areas. The conversion of Cerrado into pasture and its consequent fragmentation causes negative impacts on the C and N sequestration and storage capacity, both in pasture and in natural vegetation. |
| first_indexed | 2024-04-11T07:16:26Z |
| format | Article |
| id | doaj.art-2c43d112c344401789c76fedaf9cb64f |
| institution | Directory Open Access Journal |
| issn | 1808-4524 2176-9478 |
| language | English |
| last_indexed | 2024-04-11T07:16:26Z |
| publishDate | 2021-06-01 |
| publisher | Associação Brasileira de Engenharia Sanitária e Ambiental |
| record_format | Article |
| series | Revista Brasileira de Ciências Ambientais |
| spelling | doaj.art-2c43d112c344401789c76fedaf9cb64f2022-12-22T04:37:55ZengAssociação Brasileira de Engenharia Sanitária e AmbientalRevista Brasileira de Ciências Ambientais1808-45242176-94782021-06-0156226627310.5327/Z21769478845986Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pastureNaelmo de Souza Oliveira0https://orcid.org/0000-0002-4062-880XJolimar Antonio Schiavo1https://orcid.org/0000-0003-0061-4726Miriam Ferreira Lima2https://orcid.org/0000-0002-1308-6224Lais Thomaz Laranjeira3https://orcid.org/0000-0003-0328-8268Geisielly Pereira Nunes4https://orcid.org/0000-0001-9302-501XSidne Canassa da Cruz5https://orcid.org/0000-0001-7558-6964State University of Mato Grosso do Sul (UEMS) - BrazilState University of Mato Grosso do Sul (UEMS) - BrazilState University of Mato Grosso do Sul (UEMS) - BrazilState University of Mato Grosso do Sul (UEMS) - BrazilFederal University of Grande Dourados (UFGD) - BrazilState University of Mato Grosso do Sul (UEMS) - BrazilConversions of natural vegetation into pasture can, in a short time, change the carbon stock and the natural abundance of δ13C in the soil. The objective of this study was to evaluate changes in carbon (C) and nitrogen (N) stocks, as well as in the natural abundance of δ13C and δ15N of Argissolo Vermelho distrófico (Acrisol), in an area of natural vegetation and planted pasture in the Cerrado region of Aquidauana (MS), Brazil. In order to do this, an area of pasture (PA), cultivated for 25 years with Urochloa brizantha, and an area of natural vegetation (NV) were evaluated. Soil samples were collected at intervals of 0.05 m up to 0.60 m depth, and physical attributes, C and N stocks (CSt and NSt) and isotopic variations of δ13C and δ15N of soil were determined. In the 0–0.05 m layer, the highest C and N stocks occurred in NV, 21.99 and 1.9 Mg ha-1, respectively. In the conversion to PA, 14.62 Mg ha-1 of CSt and 1.36 Mg ha-1 of NSt were lost in the 0–0.05 m layer. The area with PA had greater isotopic enrichment of δ13C in the layers of 0–0.05 and 0.05–0.10 m, with values of -18.3 and -17.4‰, respectively, while in the other layers the isotopic values decreased with the mixture between C of C3 and C4 plants. NV showed enrichment in the isotopic signals, in the layers from 0.25–0.30 m up to 0.40–0.45 m, with values between -21.74 and -21.54‰, respectively, which is characteristic of mixed vegetation of C3 and C4 plants. The values of δ15 N showed isotopic enrichment as depth increased, indicating greater mineralization of soil organic matter in both areas. The conversion of Cerrado into pasture and its consequent fragmentation causes negative impacts on the C and N sequestration and storage capacity, both in pasture and in natural vegetation.https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/845acrisol; isotopic composition; vegetation conversion; organic matter. |
| spellingShingle | Naelmo de Souza Oliveira Jolimar Antonio Schiavo Miriam Ferreira Lima Lais Thomaz Laranjeira Geisielly Pereira Nunes Sidne Canassa da Cruz Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture Revista Brasileira de Ciências Ambientais acrisol; isotopic composition; vegetation conversion; organic matter. |
| title | Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture |
| title_full | Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture |
| title_fullStr | Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture |
| title_full_unstemmed | Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture |
| title_short | Isotopic variations of carbon and nitrogen and their implications on the conversion of Cerrado vegetation into pasture |
| title_sort | isotopic variations of carbon and nitrogen and their implications on the conversion of cerrado vegetation into pasture |
| topic | acrisol; isotopic composition; vegetation conversion; organic matter. |
| url | https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/845 |
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