Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil

Pinho, Rachel C.; Alfaia, Sonia Sena; Miller, Robert Pritchard; Uguen, Katell; Magalhães, Leovone D.; Ayres, Marta Iria da Costa; Freitas, Viviane; Trancoso, Ralph

Artigo

Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil

Homegardens are a common feature of indigenous dwellings in the savannas of Roraima, northern Brazil. In order to evaluate the effect of homegardens on soils, samples were taken in 5 sites each in the categories new homegardens (0-10-years old), established homegardens (15-35-years old) and old home...

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Autor principal:	Pinho, Rachel C.
Outros Autores:	Alfaia, Sonia Sena, Miller, Robert Pritchard, Uguen, Katell, Magalhães, Leovone D., Ayres, Marta Iria da Costa, Freitas, Viviane, Trancoso, Ralph
Grau:	Artigo
Idioma:	English
Publicado em:	Agroforestry Systems 2020
Assuntos:	Anthropogenic Effect Comparative Study Fallow Home Garden Savanna Soil Chemistry Soil Depth Soil Fertility Soil Improvement Soil Nutrient Soil Organic Matter Brasil Roraima
Acesso em linha:	https://repositorio.inpa.gov.br/handle/1/18218

id	oai:repositorio:1-18218
recordtype	dspace
spelling	oai:repositorio:1-18218 Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil Pinho, Rachel C. Alfaia, Sonia Sena Miller, Robert Pritchard Uguen, Katell Magalhães, Leovone D. Ayres, Marta Iria da Costa Freitas, Viviane Trancoso, Ralph Anthropogenic Effect Comparative Study Fallow Home Garden Savanna Soil Chemistry Soil Depth Soil Fertility Soil Improvement Soil Nutrient Soil Organic Matter Brasil Roraima Homegardens are a common feature of indigenous dwellings in the savannas of Roraima, northern Brazil. In order to evaluate the effect of homegardens on soils, samples were taken in 5 sites each in the categories new homegardens (0-10-years old), established homegardens (15-35-years old) and old homegardens (more than 40-years old) and in adjacent savanna in Araçá Indigenous Land, Roraima, Brazil. For comparison, samples were also taken in forest islands located nearby, on a different soil type, under 10-year-old forest fallows and high forest. P and K showed the greatest increases over time in homegarden soils, in comparison with levels found in adjacent savanna and under forest. Ca and Mg also increased in comparison to adjacent savanna, but levels were less than found in forest soils, most likely due to the different parent material. Zn and Fe also showed increases in homegarden soils over time. Cu and Mn levels showed little relation to homegarden age, suggesting greater effects of factors of soil formation than anthropogenic influences. Values for pH were slightly higher in homegardens than in adjacent savanna, while Al was lower, although these changes were poorly fit by regression models. Soil organic matter increased over time under homegardens, but still was lower than levels found under fallows and forest. Soil fertility improvement under indigenous homegardens can be attributed mainly to deposition of residues around dwellings, although further investigation is needed on the role of trees in accessing nutrient pools at greater depths in savanna soils. © 2010 Springer Science+Business Media B.V. 2020-06-15T21:52:44Z 2020-06-15T21:52:44Z 2011 Artigo https://repositorio.inpa.gov.br/handle/1/18218 10.1007/s10457-010-9336-5 en Volume 81, Número 3, Pags. 235-247 Restrito Agroforestry Systems
institution	Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection	INPA-RI
language	English
topic	Anthropogenic Effect Comparative Study Fallow Home Garden Savanna Soil Chemistry Soil Depth Soil Fertility Soil Improvement Soil Nutrient Soil Organic Matter Brasil Roraima
spellingShingle	Anthropogenic Effect Comparative Study Fallow Home Garden Savanna Soil Chemistry Soil Depth Soil Fertility Soil Improvement Soil Nutrient Soil Organic Matter Brasil Roraima Pinho, Rachel C. Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
topic_facet	Anthropogenic Effect Comparative Study Fallow Home Garden Savanna Soil Chemistry Soil Depth Soil Fertility Soil Improvement Soil Nutrient Soil Organic Matter Brasil Roraima
description	Homegardens are a common feature of indigenous dwellings in the savannas of Roraima, northern Brazil. In order to evaluate the effect of homegardens on soils, samples were taken in 5 sites each in the categories new homegardens (0-10-years old), established homegardens (15-35-years old) and old homegardens (more than 40-years old) and in adjacent savanna in Araçá Indigenous Land, Roraima, Brazil. For comparison, samples were also taken in forest islands located nearby, on a different soil type, under 10-year-old forest fallows and high forest. P and K showed the greatest increases over time in homegarden soils, in comparison with levels found in adjacent savanna and under forest. Ca and Mg also increased in comparison to adjacent savanna, but levels were less than found in forest soils, most likely due to the different parent material. Zn and Fe also showed increases in homegarden soils over time. Cu and Mn levels showed little relation to homegarden age, suggesting greater effects of factors of soil formation than anthropogenic influences. Values for pH were slightly higher in homegardens than in adjacent savanna, while Al was lower, although these changes were poorly fit by regression models. Soil organic matter increased over time under homegardens, but still was lower than levels found under fallows and forest. Soil fertility improvement under indigenous homegardens can be attributed mainly to deposition of residues around dwellings, although further investigation is needed on the role of trees in accessing nutrient pools at greater depths in savanna soils. © 2010 Springer Science+Business Media B.V.
format	Artigo
author	Pinho, Rachel C.
author2	Alfaia, Sonia Sena Miller, Robert Pritchard Uguen, Katell Magalhães, Leovone D. Ayres, Marta Iria da Costa Freitas, Viviane Trancoso, Ralph
author2Str	Alfaia, Sonia Sena Miller, Robert Pritchard Uguen, Katell Magalhães, Leovone D. Ayres, Marta Iria da Costa Freitas, Viviane Trancoso, Ralph
title	Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
title_short	Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
title_full	Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
title_fullStr	Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
title_full_unstemmed	Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil
title_sort	islands of fertility: soil improvement under indigenous homegardens in the savannas of roraima, brazil
publisher	Agroforestry Systems
publishDate	2020
url	https://repositorio.inpa.gov.br/handle/1/18218
_version_	1787144554301882368
score	11.653393

Islands of fertility: Soil improvement under indigenous homegardens in the savannas of Roraima, Brazil

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