Data/hora: 03/06/2024 06:33:04

Provedor de dados: 	124	
País: 	Brazil	
Título: 	Oxidizable carbon fractions in Red Latosol under different management systems	
Autores: 	Guareschi,Roni Fernandes; Pereira,Marcos Gervasio; Perin,Adriano.	
Data: 	2013-06-01	
Ano: 	2013	
Palavras-chave: 	No-tillage; Grassland; Soil organic matter; Labile carbon.	
Resumo: 	The aim of this study was to evaluate the oxidizable fractions of organic C in a Red Latosol in an area of cerrado under a no-tillage system (NT) with different years of implantation, and to compare them to areas of native cerrado and pasture. The experimental design used was completely randomized with five replications. Treatments consisted of five areas: native cerrado (NC) "stricto sensu"; pasture (PA) planted with Brachiaria decumbens; NT with 3 (NT3); NT with 15 (NT15) and NT with 20 (NT20) years of implantation. There was an increase in the ground-surface mass of vegetable residue as a function of the time of implantation of the NT. An increase in C content and the carbon-management index (CMI) can be seen as a function of the time of implantation of the NT. In the area of NT20 the greatest values of C were quantified, compared to the area of cerrado. In general, there are increased labile and stable MOS fractions as a function of the implantation time of the NT, while the areas SPD15 and SPD20 present a C content among fractions, respectively similar and/or superior to the area of NC. Regardless of the area evaluated, a predominance of the more stable MOS fractions (F3+F4) can be seen. The area of PA, due to inadequate management, shows a more advanced stage of degradation when compared to the other areas, as there is a large reduction in the levels of total C, of C in the more labile and stable MOS fractions, as well as lower CMI values.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200005	
Editor: 	Universidade Federal do Ceará	
Relação: 	10.1590/S1806-66902013000200005	
Formato: 	text/html	
Fonte: 	Revista Ciência Agronômica  v.44 n.2 2013	
Fonte: 	info:eu-repo/semantics/openAccess