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Registros recuperados: 5
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Agriculture without burning: restoration of altered areas with chop-and-mulch sequential agroforestry systems in the Amazon region. Repositório Alice
SHIMIZU, M. K.; KATO, O. R.; FIGUEIREDO, R. de O.; VASCONCELOS, S. S.; SÁ, T. D. de A.; BORGES, A. C. M. R..
Traditional shifting cultivation in the Amazon region has caused negative environmental and social effects due to the use of fire. This type of agriculture has been criticized because it results in emission of large amounts of carbon into the atmosphere and a loss of soil productive potential. Since 1991, Project SHIFT-Tipitamba has researched this type of agriculture and, in a subsequent phase, attempted to propose solutions that could be adopted in northeastern Pará, a region of ancient colonization in Amazon and highly anthropized based on an exclusively slash-and-burn agricultural system for more than 100 years. This paper presents some results obtained over two decades of research on these agricultural systems and proposes a method for the recovery or...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Agricultura sem queima; Amazônia; Shift cultivation; Slash-and-burn; Derruba-e-queima; Amazon; Sistema agroflorestal; Tipitamba.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1003995
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Early changes in arbuscular mycorrhiza development in sugarcane under two harvest management systems BJM
Azevedo,Lucas Carvalho Basilio de; Stürmer,Sidney Luiz; Lambais,Marcio Rodrigues.
Sugarcane (Saccharum spp.) is grown on over 8 million ha in Brazil and is used to produce ethanol and sugar. Some sugarcane fields are burned to facilitate harvesting, which can affect the soil microbial community. However, whether sugarcane pre-harvest burning affects the community of arbuscular mycorrhizal fungi (AMF) and symbioses development is not known. In this study, we investigated the early impacts of harvest management on AMF spore communities and root colonization in three sugarcane varieties, under two harvest management systems (no-burning and pre-harvest burning). Soil and root samples were collected in the field after the first harvest of sugarcane varieties SP813250, SP801842, and RB72454, and AMF species were identified based on spore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glomeromycota; Slash-and-burn; Sugarcane harvest management; No-burning.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300032
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Poverty and environmental degradation under trade liberalization: searching for second-best policy options. AgEcon
Pascual, Unai; Martinez-Espineira, Roberto.
Forest based agricultural systems in the tropics are being opened up to international trade at an unprecedented rate. This is the case of tropical agriculture in Mexico under the North American Free Trade Agreement (NAFTA), which is also having significant impacts on the decentralized land use decisions of small-scale farmers and on the natural resource base on which they depend. This paper develops a bioeconomic model of a typical forest-land based farming system that is integrated with the non-farm labour sector, as typically found in tropical regions. The data used to generate the simulations were gathered in two communities of Yucatan (Mexico) in 1998-2000. Through a systemdynamics framework, the agro-ecological and farming economic subsystems are...
Tipo: Journal Article Palavras-chave: Rural povery; Soil degradation; Slash-and-burn; Land-use model; Liberalization; Mexico; Environmental Economics and Policy; International Relations/Trade; Q12; Q23; D13; I3.
Ano: 2006 URL: http://purl.umn.edu/7992
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Propriedades químicas de um solo sob manejo tradicional em diferentes períodos de pousio no semiárido cearense. Repositório Alice
MAGALHÃES, R. B.; MAIA, L. dos S.; AGUIAR, M. I. de; FIALHO, J. S.; OLIVEIRA, T. S. de; CAMPANHA, M. M..
Resumo: O semiárido brasileiro é caracterizado por altas temperaturas, reduzida pluviosidade e pequena produção de fitomassa. Somando-se a essas condições edafoclimáticas, observa-se predomínio da agricultura tradicional, que degrada os recursos naturais tornando-se insustentável. Objetivou-se comparar as propriedades químicas do solo de agroecossistemas sob manejo tradicional e diferentes períodos de pousio no semi árido cearense. Os agroecossistemas tradicionais foram: tradicional implantado em 2009 (TRAD 0); tradicional em pousio há 6 anos (TRAD 6); tradicional em pousio há 9 anos (TRAD 9); e uma área sob mata nativa (MN). O experimento foi realizado na Fazenda Crioula, pertencente a Embrapa Caprionos e Ovinos, em Sobral, Ceará. Foram analisadas as...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Brasil; Ceará; Semiárido; Slash-and-burn; Código florestal; Manejo do solo; Propriedade físico-química; Queimada; Sistema de cultivo; Pousio; Caatinga; Burners; Fallow systems; Soil management; Chemicophysical properties; Semiarid soils; Brazil.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/865800
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Shorter Fallow Cycles Affect the Availability of Noncrop Plant Resources in a Shifting Cultivation System Ecology and Society
Dalle, Sarah Paule; Department of Plant Science, Macdonald Campus of McGill University; sarah.dalle@mail.mcgill.ca; de Blois, Sylvie; Department of Plant Science and McGill School of Environment, McGill University; sylvie.deblois@mcgill.ca.
Shifting cultivation systems, one of the most widely distributed forms of agriculture in the tropics, provide not only crops of cultural significance, but also medicinal, edible, ritual, fuel, and forage resources, which contribute to the livelihoods, health, and cultural identity of local people. In many regions across the globe, shifting cultivation systems are undergoing important changes, one of the most pervasive being a shortening of the fallow cycle. Although there has been much attention drawn to declines in crop yields in conjunction with reductions in fallow times, little if any research has focused on the dynamics of noncrop plant resources. In this paper, we use a data set of 26 fields of the same age, i.e., ~1.5 yr, but differing in the...
Tipo: Peer-Reviewed Reports Palavras-chave: Agricultural intensification; Ethnobotany; Fuelwood; Land-use change; Mexico; Milpa; Quintana Roo; Resource scarcity; Slash-and-burn; Swidden agriculture; Tropical succession; Wild plant resources; Yucatec Maya..
Ano: 2006
Registros recuperados: 5
Primeira ... 1 ... Última
 

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