Data/hora: 26/09/2024 14:20:48

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	10/03/2014	
Data da última atualização: 	02/09/2020	
Autoria: 	ROCHA JUNIOR, P. R. da; DONAGEMMA, G. K.; ANDRADE, F. V.; PASSOS, R. R.; BALIEIRO, F. de C.; MENDONÇA, E. de S.; RUIZ, H. A.	
Afiliação: 	P. R. da Rocha Junior, UFES; GUILHERME KANGUSSU DONAGEMMA, CNPS; F. V. Andrade, UFES; R. R. Passos, UFES; FABIANO DE CARVALHO BALIEIRO, CNPS; E. de S. Mendonça, EMBRAPA SOLOS; H. A. Ruiz, Department of Soil Science and Plant Nutrition, Federal University of Viçosa.	
Título: 	Can soil organic carbon pools indicate the degradation levels of pastures in the Atlantic Forest biome.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Journal of Agricultural Science, v. 6, n. 1, 2014.	
Idioma: 	Inglês	
Conteúdo: 	In Brazil, a large part of the Atlantic Forest was deforested in pastures, which were developed on the basis of natural fertility and organic matter content of the new deforested soil. However, as time went by the organic matter content in these areas have been decreasing causing soil degradation. The objective of this study was to evaluate the organic matter as a quality indicator of Ultisols in different levels of pasture degradation in the region of Governador Valadares-MG. Four sites of pastures were chosen at different levels of degradation, observed visually, two capoeiras in different stages of natural recovery and forest site (reference). Soil samples were collected at three depths (0.00-0.05, 0.05-0.10 and 10-0.20 m) in two seasons of the year (rainy and dry seasons) in the middle third of the landform with three replicates. The following attributes were determined: soil organic C, free light fraction, particulate organic matter, particulate organic C, mineral-associated organic C and dissolved organic matter. The experimental results showed that the soil organic matter appeared efficient in discriminating soil quality between degraded forest/pasture, as well as between degraded capoeira/pasture. But, it was not sensitive to discriminate within levels of degraded pastures. Among the organic matter pools studied, the most sensitive soil quality indicators were: particulate organic matter and dissolved organic matter, in the following degraded order verified from these indicators: forest < capoeira 1 = capoeira 2 < pastures (1, 2, 3 and 4).	
Palavras-Chave: 	Organic matter pool.	
Thesaurus Nal: 	degradation; particulate organic matter; soil quality; Ultisols.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/98850/1/Paulinho-Rocha-Jr-et-al.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (18066-1) - UPC - AP - DD -  -  - 2014.00178 - DIS