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| Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
01/12/2023 |
Data da última atualização: |
01/12/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ABRELL, T.; NAUDIN, K.; BIANCHI, F. J. J. A.; ARAGAO, D. V.; TITTONELL, P.; CORBEELS, M. |
Afiliação: |
THOMAS ABRELL, CENTRE DE COOPÉRATION INTERNATIONALE EN RECHERCHE AGRONOMIQUE POUR LE DÉVELOPPEMENT; KRISHNA NAUDIN, CENTRE DE COOPÉRATION INTERNATIONALE EN RECHERCHE AGRONOMIQUE POUR LE DÉVELOPPEMENT; FELIX J. J. A. BIANCHI, WAGENINGEN UNIVERSITY AND RESEARCH; DEBORA VEIGA DE ARAGAO, CPATU; PABLO TITTONELL, CENTRE DE COOPÉRATION INTERNATIONALE EN RECHERCHE AGRONOMIQUE POUR LE DÉVELOPPEMENT; MARC CORBEELS, CENTRE DE COOPÉRATION INTERNATIONALE EN RECHERCHE AGRONOMIQUE POUR LE DÉVELOPPEMENT. |
Título: |
Shifting cultivation in decline: An analysis of soil fertility and weed pressure in intensified cropping systems in Eastern Amazon. |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 360, 108793, 2024. |
DOI: |
https://doi.org/10.1016/j.agee.2023.108793 |
Idioma: |
Inglês |
Conteúdo: |
Reconciling forest preservation and agricultural production is a major challenge. In Brazil, environmental laws have been introduced to reduce forest degradation associated with the expansion of agriculture. However, these laws are constraining small-scale family farmers who rely on cassava produced in shifting cultivation. Faced by scarcity of land, farmers are reducing the fallow periods on their farms. In this study, our hypothesis was that the reduction of the fallow period in shifting cultivation systems leads to a depletion of soil fertility and an increase in weed pressure. In the Brazilian Eastern Amazon region, soil fertility and weed infestation indicators were assessed in 36 cassava fields under shifting cultivation with different land-use histories. The frequency of cultivation of the fields in the past 10 years ranged from 1 to 7 and averaged 3.7 ± 2.3. The results show that the most frequently cultivated fields had lower soil fertility, indicated by lower soil organic carbon, total nitrogen and exchangeable potassium and pH. In addition, labor input for weeding and weeding frequency increased with the frequency of cultivation of the fields, indicating that weed pressure increased with intensified crop cultivation and shorter fallow periods. The findings of this study make clear that the current trend of reducing the fallow period in the Eastern Amazon is a threat to the sustainability and productivity of the local shifting cultivation systems. There is an urgent need for alternative production systems that allow for a better weed control and that contribute to restoring and maintaining soil fertility. MenosReconciling forest preservation and agricultural production is a major challenge. In Brazil, environmental laws have been introduced to reduce forest degradation associated with the expansion of agriculture. However, these laws are constraining small-scale family farmers who rely on cassava produced in shifting cultivation. Faced by scarcity of land, farmers are reducing the fallow periods on their farms. In this study, our hypothesis was that the reduction of the fallow period in shifting cultivation systems leads to a depletion of soil fertility and an increase in weed pressure. In the Brazilian Eastern Amazon region, soil fertility and weed infestation indicators were assessed in 36 cassava fields under shifting cultivation with different land-use histories. The frequency of cultivation of the fields in the past 10 years ranged from 1 to 7 and averaged 3.7 ± 2.3. The results show that the most frequently cultivated fields had lower soil fertility, indicated by lower soil organic carbon, total nitrogen and exchangeable potassium and pH. In addition, labor input for weeding and weeding frequency increased with the frequency of cultivation of the fields, indicating that weed pressure increased with intensified crop cultivation and shorter fallow periods. The findings of this study make clear that the current trend of reducing the fallow period in the Eastern Amazon is a threat to the sustainability and productivity of the local shifting cultivation systems. There is an urgen... Mostrar Tudo |
Palavras-Chave: |
Produção sustentável; Sustainable production. |
Thesagro: |
Conservação do Solo; Erva Daninha; Fertilidade do Solo; Mandioca. |
Thesaurus Nal: |
Cassava; Soil conservation; Weed control. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02591naa a2200301 a 4500 001 2158999 005 2023-12-01 008 2024 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.agee.2023.108793$2DOI 100 1 $aABRELL, T. 245 $aShifting cultivation in decline$bAn analysis of soil fertility and weed pressure in intensified cropping systems in Eastern Amazon.$h[electronic resource] 260 $c2024 520 $aReconciling forest preservation and agricultural production is a major challenge. In Brazil, environmental laws have been introduced to reduce forest degradation associated with the expansion of agriculture. However, these laws are constraining small-scale family farmers who rely on cassava produced in shifting cultivation. Faced by scarcity of land, farmers are reducing the fallow periods on their farms. In this study, our hypothesis was that the reduction of the fallow period in shifting cultivation systems leads to a depletion of soil fertility and an increase in weed pressure. In the Brazilian Eastern Amazon region, soil fertility and weed infestation indicators were assessed in 36 cassava fields under shifting cultivation with different land-use histories. The frequency of cultivation of the fields in the past 10 years ranged from 1 to 7 and averaged 3.7 ± 2.3. The results show that the most frequently cultivated fields had lower soil fertility, indicated by lower soil organic carbon, total nitrogen and exchangeable potassium and pH. In addition, labor input for weeding and weeding frequency increased with the frequency of cultivation of the fields, indicating that weed pressure increased with intensified crop cultivation and shorter fallow periods. The findings of this study make clear that the current trend of reducing the fallow period in the Eastern Amazon is a threat to the sustainability and productivity of the local shifting cultivation systems. There is an urgent need for alternative production systems that allow for a better weed control and that contribute to restoring and maintaining soil fertility. 650 $aCassava 650 $aSoil conservation 650 $aWeed control 650 $aConservação do Solo 650 $aErva Daninha 650 $aFertilidade do Solo 650 $aMandioca 653 $aProdução sustentável 653 $aSustainable production 700 1 $aNAUDIN, K. 700 1 $aBIANCHI, F. J. J. A. 700 1 $aARAGAO, D. V. 700 1 $aTITTONELL, P. 700 1 $aCORBEELS, M. 773 $tAgriculture, Ecosystems and Environment$gv. 360, 108793, 2024.
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Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
01/08/1992 |
Data da última atualização: |
27/01/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
BARROS, N. N.; FREIRE, L. C. L.; LOPES, E. A.; JOHNSON, W. L. |
Afiliação: |
Nelson Nogueira Barros, CNPC; Luiz Carlos Lopes Freire, CNPC; Expedito Aguiar Lopes, CNPC; William L. Johnson, North Carolina State University, Raleigh, North Carolina, USA. |
Título: |
Estudo comparativo da digestibilidade de leguminosa forrageira com ovinos e caprinos. I. Digestibilidade in vivo do feno de cunhã. |
Ano de publicação: |
1991 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 26, n. 8, p. 1209-1213, ago., 1991. |
Idioma: |
Português |
Conteúdo: |
Resumo: Foram utilizados doze animais, sendo seis caprinos SRD e seis ovinos Santa Ines, machos, para avaliar o valor nutritivo do feno de cunha (Clitoria ternatea). Os animais foram mantidos em gaiolas de metabolismo por um periodo de adaptacao de 14 dias seguidos de sete de coleta total de fezes e urina. O consumo de forragem foi ad libitum e os animais tiveram livre acesso a agua e ao sal mineral. Os teores de proteina bruta, fibra em detergente neutro e lignina em KMnO4 foram de 22,6%, 49,7% e 8,3%, respectivamente. Entre as especies de animais nao foi detectada diferenca (P<0,05) para nenhuma das variaveis estudadas. No entanto, quando o balanco de N foi avaliado em funcao do N consumido, os dados sugerem que os caprinos fazem melhor utilizacao do N da dieta do que os ovinos.
[Comparative study of digestibility of forage legume with sheep and goats. I. In vivo digestibility of cunhã hay]. |
Palavras-Chave: |
Balanço de nitrogênio; Brasil; Digestibilidade in vivo; Nordeste; Northeast. |
Thesagro: |
Caprino; Composição química; Consumo alimentar; Forragem; Nutrição animal; Ovino; Valor nutritivo. |
Thesaurus NAL: |
Animal nutrition; Brazil; Chemical composition; Feed intake; Forage; Goats; In vitro digestibility; nitrogen balance; Nutritive value; Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02101naa a2200421 a 4500 001 1514230 005 2021-01-27 008 1991 bl uuuu u00u1 u #d 100 1 $aBARROS, N. N. 245 $aEstudo comparativo da digestibilidade de leguminosa forrageira com ovinos e caprinos. I. Digestibilidade in vivo do feno de cunhã. 260 $c1991 520 $aResumo: Foram utilizados doze animais, sendo seis caprinos SRD e seis ovinos Santa Ines, machos, para avaliar o valor nutritivo do feno de cunha (Clitoria ternatea). Os animais foram mantidos em gaiolas de metabolismo por um periodo de adaptacao de 14 dias seguidos de sete de coleta total de fezes e urina. O consumo de forragem foi ad libitum e os animais tiveram livre acesso a agua e ao sal mineral. Os teores de proteina bruta, fibra em detergente neutro e lignina em KMnO4 foram de 22,6%, 49,7% e 8,3%, respectivamente. Entre as especies de animais nao foi detectada diferenca (P<0,05) para nenhuma das variaveis estudadas. No entanto, quando o balanco de N foi avaliado em funcao do N consumido, os dados sugerem que os caprinos fazem melhor utilizacao do N da dieta do que os ovinos. [Comparative study of digestibility of forage legume with sheep and goats. I. In vivo digestibility of cunhã hay]. 650 $aAnimal nutrition 650 $aBrazil 650 $aChemical composition 650 $aFeed intake 650 $aForage 650 $aGoats 650 $aIn vitro digestibility 650 $anitrogen balance 650 $aNutritive value 650 $aSheep 650 $aCaprino 650 $aComposição química 650 $aConsumo alimentar 650 $aForragem 650 $aNutrição animal 650 $aOvino 650 $aValor nutritivo 653 $aBalanço de nitrogênio 653 $aBrasil 653 $aDigestibilidade in vivo 653 $aNordeste 653 $aNortheast 700 1 $aFREIRE, L. C. L. 700 1 $aLOPES, E. A. 700 1 $aJOHNSON, W. L. 773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 26, n. 8, p. 1209-1213, ago., 1991.
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