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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
04/06/1999 |
Data da última atualização: |
26/04/2024 |
Autoria: |
KATO, M. do S. A. |
Afiliação: |
MARIA DO SOCORRO ANDRADE KATO, CPATU. |
Título: |
Fire-free land preparation as an alternative to slash-and-burn agriculture in the bragantina region, eastern Amazon: crop performance and phosphorus dynamics. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
1998. |
Páginas: |
144 p. |
ISBN: |
3-89712-347-9 |
Idioma: |
Inglês |
Notas: |
Doctoral Dissertation (Doctor of Agricultural Sciences) - George-August-University Göttingen, Göttingen. |
Conteúdo: |
Shifting cultivation is the most important agricultural land-use system in the Amazon region and the slash-and-bum practice is the traditional method for land preparation used by small farmers. During slash and buming, however, high amounts of nutrients are lost through volatilization. This fact, exacerbate by reduced fallow time, decreases the total nutrient stock offallow systems and compromises the system's sustainability. The objectives of this study were: I) to evaluate the effects of fire-free land preparation on crop performance and phosphorus dynamics; 2) to evaluate the importance of the use of chemical fertilizer in systems without the use of fire and 3) to select rice, maize, cowpea and cassava cultivars suitable for mulch systems. The studies were conducted in the community of Cumaru in the municipality of Igarapé Açu (Pará, Brazil) on two neighboring sites with 4-year-old (FV4y) and 10-year-old fallow vegetation (FVIOy). Three treatments for land preparation were tested with and without fertilizer. The treatments were: I) buming ± NPK fertilization; 2) mulching ± NPK fertilization; 3) incorporation of the fallow vegetation biomass into the soil ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the phosphorus dynamics in the soil and uptake by the crops were evaluated. Furthermore, screening experiments were set up to evaluate the yield characteristics of a total of 8 rice, 18 maize, 21 cowpea and 5 cassava cultivars under mulch conditions with and without fertilizer application... MenosShifting cultivation is the most important agricultural land-use system in the Amazon region and the slash-and-bum practice is the traditional method for land preparation used by small farmers. During slash and buming, however, high amounts of nutrients are lost through volatilization. This fact, exacerbate by reduced fallow time, decreases the total nutrient stock offallow systems and compromises the system's sustainability. The objectives of this study were: I) to evaluate the effects of fire-free land preparation on crop performance and phosphorus dynamics; 2) to evaluate the importance of the use of chemical fertilizer in systems without the use of fire and 3) to select rice, maize, cowpea and cassava cultivars suitable for mulch systems. The studies were conducted in the community of Cumaru in the municipality of Igarapé Açu (Pará, Brazil) on two neighboring sites with 4-year-old (FV4y) and 10-year-old fallow vegetation (FVIOy). Three treatments for land preparation were tested with and without fertilizer. The treatments were: I) buming ± NPK fertilization; 2) mulching ± NPK fertilization; 3) incorporation of the fallow vegetation biomass into the soil ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the phosphorus dynamics in the soil and uptake by the crops were evaluated. Furthermore, screening experiments were set up to evaluate the yield characteristics of a total... Mostrar Tudo |
Palavras-Chave: |
Brasil; Cowpea; Igarapé-Açu; Maize; Pará; Phosphate fertilizers. |
Thesagro: |
Arroz; Cobertura Morta; Feijão; Fertilizante Fosfatado; Fósforo; Mandioca; Matéria Orgânica; Milho; Vegetação Secundária. |
Thesaurus Nal: |
Amazonia; cassava; organic matter; phosphorus; rice; vegetation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02755nam a2200397 a 4500 001 1402793 005 2024-04-26 008 1998 bl uuuu m 00u1 u #d 020 $a3-89712-347-9 100 1 $aKATO, M. do S. A. 245 $aFire-free land preparation as an alternative to slash-and-burn agriculture in the bragantina region, eastern Amazon$bcrop performance and phosphorus dynamics. 260 $a1998.$c1998 300 $a144 p. 500 $aDoctoral Dissertation (Doctor of Agricultural Sciences) - George-August-University Göttingen, Göttingen. 520 $aShifting cultivation is the most important agricultural land-use system in the Amazon region and the slash-and-bum practice is the traditional method for land preparation used by small farmers. During slash and buming, however, high amounts of nutrients are lost through volatilization. This fact, exacerbate by reduced fallow time, decreases the total nutrient stock offallow systems and compromises the system's sustainability. The objectives of this study were: I) to evaluate the effects of fire-free land preparation on crop performance and phosphorus dynamics; 2) to evaluate the importance of the use of chemical fertilizer in systems without the use of fire and 3) to select rice, maize, cowpea and cassava cultivars suitable for mulch systems. The studies were conducted in the community of Cumaru in the municipality of Igarapé Açu (Pará, Brazil) on two neighboring sites with 4-year-old (FV4y) and 10-year-old fallow vegetation (FVIOy). Three treatments for land preparation were tested with and without fertilizer. The treatments were: I) buming ± NPK fertilization; 2) mulching ± NPK fertilization; 3) incorporation of the fallow vegetation biomass into the soil ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the phosphorus dynamics in the soil and uptake by the crops were evaluated. Furthermore, screening experiments were set up to evaluate the yield characteristics of a total of 8 rice, 18 maize, 21 cowpea and 5 cassava cultivars under mulch conditions with and without fertilizer application... 650 $aAmazonia 650 $acassava 650 $aorganic matter 650 $aphosphorus 650 $arice 650 $avegetation 650 $aArroz 650 $aCobertura Morta 650 $aFeijão 650 $aFertilizante Fosfatado 650 $aFósforo 650 $aMandioca 650 $aMatéria Orgânica 650 $aMilho 650 $aVegetação Secundária 653 $aBrasil 653 $aCowpea 653 $aIgarapé-Açu 653 $aMaize 653 $aPará 653 $aPhosphate fertilizers
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
31/03/1992 |
Data da última atualização: |
10/04/2018 |
Autoria: |
ALMEIDA, A. M. R. |
Afiliação: |
ALVARO MANUEL RODRIGUES ALMEIDA, CNPSO. |
Título: |
Influência do pH sobre crescimento e esporulação de Corynespora cassiicola (Berk & Curt.) Wei em meio de batata-dextrose-agar em diferentes períodos de incubação. |
Ano de publicação: |
1977 |
Fonte/Imprenta: |
Fitopatologia Brasileira, Brasilia, DF, v.2, n.2, p.175-177, jul. 1977. |
Idioma: |
Português |
Conteúdo: |
Isolados de C. cassiicola obtidos a partir de lesoes em folhas e raizes de soja apresentaram crescimento lento em meio de BDA. Procurou-se determinar a faixa de pH que induza maior crescimento e esporulacao deste patogeno nesse meio. A faixa de pH testada variou de 4,0 a 8,0 com intervalos de 0,5. Apos 2, 4, 8 e 16 dias de incubacao determinou-se o diametro da colonia e a esporulacao. O maximo crescimento micelial e esporulacao ocorreram na faixa de pH de 6,5 a 7,5 apos 4, 8 e 16 dias de incubacao. |
Palavras-Chave: |
Disease; Fitopatologia; Fungus; Phytopathology; Soybean. |
Thesagro: |
Corynespora Cassiicola; Doença; Esporulação; Fungo; Soja. |
Thesaurus NAL: |
sporulation. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/175235/1/Almeida-Influencia-do-ph-sobre.pdf
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Marc: |
LEADER 01266naa a2200253 a 4500 001 1444526 005 2018-04-10 008 1977 bl uuuu u00u1 u #d 100 1 $aALMEIDA, A. M. R. 245 $aInfluência do pH sobre crescimento e esporulação de Corynespora cassiicola (Berk & Curt.) Wei em meio de batata-dextrose-agar em diferentes períodos de incubação. 260 $c1977 520 $aIsolados de C. cassiicola obtidos a partir de lesoes em folhas e raizes de soja apresentaram crescimento lento em meio de BDA. Procurou-se determinar a faixa de pH que induza maior crescimento e esporulacao deste patogeno nesse meio. A faixa de pH testada variou de 4,0 a 8,0 com intervalos de 0,5. Apos 2, 4, 8 e 16 dias de incubacao determinou-se o diametro da colonia e a esporulacao. O maximo crescimento micelial e esporulacao ocorreram na faixa de pH de 6,5 a 7,5 apos 4, 8 e 16 dias de incubacao. 650 $asporulation 650 $aCorynespora Cassiicola 650 $aDoença 650 $aEsporulação 650 $aFungo 650 $aSoja 653 $aDisease 653 $aFitopatologia 653 $aFungus 653 $aPhytopathology 653 $aSoybean 773 $tFitopatologia Brasileira, Brasilia, DF$gv.2, n.2, p.175-177, jul. 1977.
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