Data/hora: 24/06/2024 06:05:53

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 20/03/2018
Data da última atualização: | 24/01/2019
Autoria: | SIGNOR, D.; DEON, M. D.; CAMARGO, P. B. de; CERRI, C. E. P.
Afiliação: | DIANA SIGNOR DEON, CPATSA; MAGNUS DALLIGNA DEON, CPATSA; PLÍNIO BARBOSA DE CAMARGO, USP/CENA; CARLOS EDUARDO PELLEGRINO CERRI, University of São Paulo/ESALQ.
Título: | Quantity and quality of soil organic matter as a sustainability index different land uses in eastern Amazon.
Ano de publicação: | 2018
Fonte/Imprenta: | Scientia Agrícola, Piracicaba, v. 75, n. 3, p. 225-232, may/jun. 2018.
ISSN: | 1678-992X
DOI: | 10.1590/1678-992X-2016-0089
Idioma: | Inglês
Conteúdo: | Soil organic matter (SOM), which influences chemical, physical and biological soil attributes, is the main form of C found in the soil which can also be used as a soil sustainability index. The aim of this study was to use the quantity and quality of SOM as an indicator to determine the sustainability of different land uses (native vegetation, secondary vegetation, fruit orchards, horticultural areas, degraded pasture, improved pasture, and fields with annual crops) in the eastern Amazon. Improved pasture had higher soil C stock than the other land uses and was similar to the native vegetation, and also presented the highest quantity of C in a stable form in the soil (fraction < 53 ìm). According to the C management index, improved pasture is the most similar in use to native vegetation. Changes in land use reduced the soil microbial C content, although the more conservationist systems (fruit orchards, secondary vegetation, and improved pasture) had contents similar to those of the native vegetation. The highest soil microbial quotients were found in fruit orchards and horticultural areas. Well-managed pastures were effective in accumulating C as stable forms in the soil, which demonstrates the sustainability of this land use in the region studied.
Palavras-Chave: | Biomassa microbiana; Carbon management index; Carbon stocks; Changes in land use; Estoque de carbono; Fracionamento físico; Indice de gerenciamento de carbono; Mudanças no uso da terra; Physical fractionation; Sustentabilidade.
Thesagro: | Matéria Orgânica; Pastagem nativa; Solo; Uso da Terra.
Thesaurus Nal: | Microbial biomass.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/174161/1/Diana-2018-2.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (57305-1) - UPC - AP - DD -  -  -  - DIS