Page 1. 36 V.12, n.1, p. 36 - 43, 2005 Floresta e Ambiente Carbono orgânico e fracionamento quími... more Page 1. 36 V.12, n.1, p. 36 - 43, 2005 Floresta e Ambiente Carbono orgânico e fracionamento químico da matéria orgânica em solos da Sierra de Ánimas Uruguai Ademir Fontana1, Lúcia Helena Cunha dos Anjos2, Jaime ...
The purpose of this study was to evaluate spatial-temporal dynamics of land cover of the Campo Gr... more The purpose of this study was to evaluate spatial-temporal dynamics of land cover of the Campo Grande and Santa Cruz Administration Regions, both in Rio de Janeiro city. LANDSAT5-TM images from 1984, 1994 and 1999 were used to create land cover maps. A Geographical Information System was used for integrating information into a cohesive and easy to consult cartographic base
ABSTRACT The crop-livestock integration system significantly increases the carbon content in chem... more ABSTRACT The crop-livestock integration system significantly increases the carbon content in chemical fractions of soil organic matter (S OM). This study aimed to evaluate chemical indicators of SOM attributes for sites under brachiaria/livestock and pearl millet/no livestock in Goias, Brazil. A third area covered with natural Cerrado vegetation (Cerradao) served as reference. Soil was randomly sampled at 0-5, 5-10, 10-20 and 20-40 cm. Total organic carbon stocks (TOC), oxidizable carbon fractions (OCF) (F1 > F2 > F3 > F4), carbon content in the humin (C - HUM), humic acid (C - HAF) and fulvic acid (C - FAF) fractions were evaluated. F1/F4, F1 + F2/F3 + F4, C - HAF/C - FAF and (C-HAF + C-FAF)/C - HUM indices were calculated, as well as stocks chemical SOM fractions. Brachiaria/livestock produced greater TOC stocks than pearl millet/no livestock (0-5, 5-10 and 10-20 cm). In terms of OCF, brachiaria/livestock generally exhibited higher levels in F1, F2, F4 and F1/F4 than pearl millet/no livestock. C - HUM (0-10 cm) and C - HAF (0-20 cm) stocks were larger in brachiaria/livestock than pearl millet/no livestock. Compared to the Cerraddo, brachiaria/livestock locations displayed higher values for TOC (5-10 and 10-20 cm), C - HAF and C - HAF/C - FAF (5-10 cm) stocks. TOC, C - HAF stock and OCF show that land management with brachiaria/livestock was more efficient in increasing SOM than pearl millet/no livestock. Moreover, when compared with pearl millet/no livestock, brachiaria/livestock provided a more balanced distribution of very labile (F1) and recalcitrant (F4) carbon throughout soil layers, greater SOM humification. Brachiaria/livestock leads to higher values of F1 and F4 in depth when compared to pearl millet/livestock and provides a more homogeneous distribution of C-FAF and C-HAF in depth compared to Cerradao.
... QUEIMA DA PALHADA (1) HNS MENDONZA(2), E. LIMA(3), LHC ANJOS(3), LA SILVA(4), MB CEDDIA(3) &a... more ... QUEIMA DA PALHADA (1) HNS MENDONZA(2), E. LIMA(3), LHC ANJOS(3), LA SILVA(4), MB CEDDIA(3) & MVM ANTUNES(5) ... Contudo, segundo Pizauro Jr. ... L. & DÖBEREINER J. Influência da queima, aplicação de nitrogênio e vinhaça na cultura de cana-de-açúcar. ...
RESUMO Este estudo teve como objetivo avaliar a diversidade ea similaridade florística de ambient... more RESUMO Este estudo teve como objetivo avaliar a diversidade ea similaridade florística de ambientes de Cerrado, sob diferentes níveis de antropização por uso agrícola e extrativismo, e gerar base de dados para subsidiar propostas de desenvolvimento ...
Page 1. 36 V.12, n.1, p. 36 - 43, 2005 Floresta e Ambiente Carbono orgânico e fracionamento quími... more Page 1. 36 V.12, n.1, p. 36 - 43, 2005 Floresta e Ambiente Carbono orgânico e fracionamento químico da matéria orgânica em solos da Sierra de Ánimas Uruguai Ademir Fontana1, Lúcia Helena Cunha dos Anjos2, Jaime ...
The purpose of this study was to evaluate spatial-temporal dynamics of land cover of the Campo Gr... more The purpose of this study was to evaluate spatial-temporal dynamics of land cover of the Campo Grande and Santa Cruz Administration Regions, both in Rio de Janeiro city. LANDSAT5-TM images from 1984, 1994 and 1999 were used to create land cover maps. A Geographical Information System was used for integrating information into a cohesive and easy to consult cartographic base
ABSTRACT The crop-livestock integration system significantly increases the carbon content in chem... more ABSTRACT The crop-livestock integration system significantly increases the carbon content in chemical fractions of soil organic matter (S OM). This study aimed to evaluate chemical indicators of SOM attributes for sites under brachiaria/livestock and pearl millet/no livestock in Goias, Brazil. A third area covered with natural Cerrado vegetation (Cerradao) served as reference. Soil was randomly sampled at 0-5, 5-10, 10-20 and 20-40 cm. Total organic carbon stocks (TOC), oxidizable carbon fractions (OCF) (F1 > F2 > F3 > F4), carbon content in the humin (C - HUM), humic acid (C - HAF) and fulvic acid (C - FAF) fractions were evaluated. F1/F4, F1 + F2/F3 + F4, C - HAF/C - FAF and (C-HAF + C-FAF)/C - HUM indices were calculated, as well as stocks chemical SOM fractions. Brachiaria/livestock produced greater TOC stocks than pearl millet/no livestock (0-5, 5-10 and 10-20 cm). In terms of OCF, brachiaria/livestock generally exhibited higher levels in F1, F2, F4 and F1/F4 than pearl millet/no livestock. C - HUM (0-10 cm) and C - HAF (0-20 cm) stocks were larger in brachiaria/livestock than pearl millet/no livestock. Compared to the Cerraddo, brachiaria/livestock locations displayed higher values for TOC (5-10 and 10-20 cm), C - HAF and C - HAF/C - FAF (5-10 cm) stocks. TOC, C - HAF stock and OCF show that land management with brachiaria/livestock was more efficient in increasing SOM than pearl millet/no livestock. Moreover, when compared with pearl millet/no livestock, brachiaria/livestock provided a more balanced distribution of very labile (F1) and recalcitrant (F4) carbon throughout soil layers, greater SOM humification. Brachiaria/livestock leads to higher values of F1 and F4 in depth when compared to pearl millet/livestock and provides a more homogeneous distribution of C-FAF and C-HAF in depth compared to Cerradao.
... QUEIMA DA PALHADA (1) HNS MENDONZA(2), E. LIMA(3), LHC ANJOS(3), LA SILVA(4), MB CEDDIA(3) &a... more ... QUEIMA DA PALHADA (1) HNS MENDONZA(2), E. LIMA(3), LHC ANJOS(3), LA SILVA(4), MB CEDDIA(3) & MVM ANTUNES(5) ... Contudo, segundo Pizauro Jr. ... L. & DÖBEREINER J. Influência da queima, aplicação de nitrogênio e vinhaça na cultura de cana-de-açúcar. ...
RESUMO Este estudo teve como objetivo avaliar a diversidade ea similaridade florística de ambient... more RESUMO Este estudo teve como objetivo avaliar a diversidade ea similaridade florística de ambientes de Cerrado, sob diferentes níveis de antropização por uso agrícola e extrativismo, e gerar base de dados para subsidiar propostas de desenvolvimento ...
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