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5. | | TORRES-ACOSTA, J. F.; JACOBS, D. E.; AGUILAR-CABALLERO, A. J. Effect of supplementary feeding on the resilience of Criollo kids browsing under tropical conditions. In: INTERNATIONAL CONFERENCE ON GOATS, 7., 2000, Tours, Poitiers, France. Proceedings... Paris: INRA: IGA: Institut de Elevage, 2000. v. 2, p. 806. Biblioteca(s): Embrapa Caprinos e Ovinos. |
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6. | | TORRES-ACOSTA, J. F.; JACOBS, D. E.; AGUILAR-CABALLERO, A. J. Dietary protein supplementation and the resilience and resistance to Haemonchus contortus of Criollo kids. In: INTERNATIONAL CONFERENCE ON GOATS, 7., 2000, Tours, Poitiers, France. Proceedings... Paris: INRA: IGA: Institut de Elevage, 2000. v. 2, p. 795. Biblioteca(s): Embrapa Caprinos e Ovinos. |
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7. | | TORRES-ACOSTA, J. F.; JACOBS, D. E.; AGUILAR-CABALLERO, A. J. Questionnaire survey on the use of supplementary feeding and anthelmintic treatment in goats among small holders in Yucatan, Mexico. In: INTERNATIONAL CONFERENCE ON GOATS, 7., 2000, Tours, Poitiers, France. Proceedings... Paris: INRA: IGA: Institut de Elevage, 2000. v. 2, p. 806. Biblioteca(s): Embrapa Caprinos e Ovinos. |
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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, O. R. |
Afiliação: |
OSVALDO RYOHEI KATO, CPATU. |
Título: |
Fire-free land preparation as an alternative to slash-and-burn agriculture in the bragantina region, eastern Amazon: crop performance and nitrogen dynamics. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
1998. |
Páginas: |
132 p. |
ISBN: |
3-98712-350-9 |
Idioma: |
Inglês |
Notas: |
Doctoral Dissertation (Doctor of Agricultural Sciences) - George-August-University Göttingen, Göttingen. |
Conteúdo: |
In the Amazon region, shifting cultivation with slash buming which is practiced by at least 500,000 small farmers, has been considered one of the main activities responsible for deforestation. To considerably reduce deforestation rates the leveI of sustainability of the shifting cultivation systems, has to be increased and technologies perrnitting an increase in the period used for cultivation of an area to three or more years need to be employed. Thus, the present study had the following objectives: I) to evaluate the effects of tire-free land preparation on crop performance and nitrogen dynarnics; 2) to evaluate the importance of chemical ferti!izer use in systems without the use of tire 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 l G-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 soi! ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the nitrogen dynamics in the soil and the nitrogen uptake by the crops were evaluated. Furtherrnore, 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... MenosIn the Amazon region, shifting cultivation with slash buming which is practiced by at least 500,000 small farmers, has been considered one of the main activities responsible for deforestation. To considerably reduce deforestation rates the leveI of sustainability of the shifting cultivation systems, has to be increased and technologies perrnitting an increase in the period used for cultivation of an area to three or more years need to be employed. Thus, the present study had the following objectives: I) to evaluate the effects of tire-free land preparation on crop performance and nitrogen dynarnics; 2) to evaluate the importance of chemical ferti!izer use in systems without the use of tire 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 l G-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 soi! ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the nitrogen dynamics in the soil and the nitrogen uptake by the crops were evaluated. Furtherrnore, screening experiments were set up to... Mostrar Tudo |
Palavras-Chave: |
Brasil; Cowpea; Igarapé-Açu; Maize; Pará. |
Thesagro: |
Arroz; Cobertura Morta; Feijão; Fertilizante Nitrogenado; Mandioca; Matéria Orgânica; Milho; Nitrogênio; Vegetação Secundária. |
Thesaurus NAL: |
Amazonia; cassava; nitrogen fertilizers; organic matter; rice; vegetation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02770nam a2200385 a 4500 001 1402791 005 2024-04-26 008 1998 bl uuuu m 00u1 u #d 020 $a3-98712-350-9 100 1 $aKATO, O. R. 245 $aFire-free land preparation as an alternative to slash-and-burn agriculture in the bragantina region, eastern Amazon$bcrop performance and nitrogen dynamics. 260 $a1998.$c1998 300 $a132 p. 500 $aDoctoral Dissertation (Doctor of Agricultural Sciences) - George-August-University Göttingen, Göttingen. 520 $aIn the Amazon region, shifting cultivation with slash buming which is practiced by at least 500,000 small farmers, has been considered one of the main activities responsible for deforestation. To considerably reduce deforestation rates the leveI of sustainability of the shifting cultivation systems, has to be increased and technologies perrnitting an increase in the period used for cultivation of an area to three or more years need to be employed. Thus, the present study had the following objectives: I) to evaluate the effects of tire-free land preparation on crop performance and nitrogen dynarnics; 2) to evaluate the importance of chemical ferti!izer use in systems without the use of tire 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 l G-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 soi! ± NPK fertilization. Rice was planted followed by cowpea and cassava in two consecutive cropping periods. Yield characteristics of the crops as well as the nitrogen dynamics in the soil and the nitrogen uptake by the crops were evaluated. Furtherrnore, 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 $anitrogen fertilizers 650 $aorganic matter 650 $arice 650 $avegetation 650 $aArroz 650 $aCobertura Morta 650 $aFeijão 650 $aFertilizante Nitrogenado 650 $aMandioca 650 $aMatéria Orgânica 650 $aMilho 650 $aNitrogênio 650 $aVegetação Secundária 653 $aBrasil 653 $aCowpea 653 $aIgarapé-Açu 653 $aMaize 653 $aPará
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