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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
04/06/1999 |
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Data da última atualização: |
26/04/2024 |
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Autoria: |
KATO, M. do S. A. |
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Afiliação: |
MARIA DO SOCORRO ANDRADE KATO, CPATU. |
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Título: |
Fire-free land preparation as an alternative to slash-and-burn agriculture in the bragantina region, eastern Amazon: crop performance and phosphorus dynamics. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
1998. |
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Páginas: |
144 p. |
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ISBN: |
3-89712-347-9 |
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Idioma: |
Inglês |
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Notas: |
Doctoral Dissertation (Doctor of Agricultural Sciences) - George-August-University Göttingen, Göttingen. |
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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 |
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Palavras-Chave: |
Brasil; Cowpea; Igarapé-Açu; Maize; Pará; Phosphate fertilizers. |
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Thesagro: |
Arroz; Cobertura Morta; Feijão; Fertilizante Fosfatado; Fósforo; Mandioca; Matéria Orgânica; Milho; Vegetação Secundária. |
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Thesaurus Nal: |
Amazonia; cassava; organic matter; phosphorus; rice; vegetation. |
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Categoria do assunto: |
-- |
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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
05/02/2019 |
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Data da última atualização: |
21/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
JIANG, F.; LOPEZ, A.; JEON, S.; FREITAS, S. T. de; YU, Q.; WU, Z.; LABAVITCH, J. M.; TIAN, S.; POWELL, A. L. T.; MITCHAM, E. |
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Afiliação: |
FANGLING JIANG; ALFONSO LOPEZ; SHINJAE JEON; SERGIO TONETTO DE FREITAS, CPATSA; QINGHUI YU; ZHEN WU; JOHN M. LABAVITCH; SHENGKE TIAN; ANN L. T. POWELL; ELIZABETH MITCHAM. |
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Título: |
Disassembly of the fruit cell wall by the ripening-associated polygalacturonase and expansin in fluences tomato cracking. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Horticulture Research, v. 6, p. 1-15, 2019. |
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DOI: |
10.1038/s41438-018-0105-3 |
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Idioma: |
Inglês |
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Conteúdo: |
Fruit cracking is an important problem in horticultural crop production. Polygalacturonase (SlPG) and expansin (SlEXP1) proteins cooperatively disassemble the polysaccharide network of tomato fruit cell walls during ripening and thereby, enable softening. A Golden 2-like (GLK2) transcription factor, SlGLK2 regulates unripe fruit chloroplast development and results in elevated soluble solids and carotenoids in ripe fruit. To determine whether SlPG, SlEXP1, or SlGLK2 influence the rate of tomato fruit cracking, the incidence of fruit epidermal cracking was compared between wild-type, Ailsa Craig (WT) and fruit with suppressed SlPG and SlEXP1 expression (pg/exp) or expressing a truncated nonfunctional Slglk2 (glk2). Treating plants with exogenous ABA increases xylemic flow into fruit. Our results showed that ABA treatment of tomato plants greatly increased cracking of fruit from WT and glk2 mutant, but not from pg/exp genotypes. The pg/exp fruit were firmer, had higher total soluble solids, denser cell walls and thicker cuticles than fruit of the other genotypes. Fruit from the ABA treated pg/exp fruit had cell walls with less water-soluble and more ionically and covalently-bound pectins than fruit from the other lines, demonstrating that ripening-related disassembly of the fruit cell wall, but not elimination of SlGLK2, influences cracking. Cracking incidence was significantly correlated with cell wall and wax thickness, and the content of cell wall protopectin and cellulose, but not with Ca2+ content. MenosFruit cracking is an important problem in horticultural crop production. Polygalacturonase (SlPG) and expansin (SlEXP1) proteins cooperatively disassemble the polysaccharide network of tomato fruit cell walls during ripening and thereby, enable softening. A Golden 2-like (GLK2) transcription factor, SlGLK2 regulates unripe fruit chloroplast development and results in elevated soluble solids and carotenoids in ripe fruit. To determine whether SlPG, SlEXP1, or SlGLK2 influence the rate of tomato fruit cracking, the incidence of fruit epidermal cracking was compared between wild-type, Ailsa Craig (WT) and fruit with suppressed SlPG and SlEXP1 expression (pg/exp) or expressing a truncated nonfunctional Slglk2 (glk2). Treating plants with exogenous ABA increases xylemic flow into fruit. Our results showed that ABA treatment of tomato plants greatly increased cracking of fruit from WT and glk2 mutant, but not from pg/exp genotypes. The pg/exp fruit were firmer, had higher total soluble solids, denser cell walls and thicker cuticles than fruit of the other genotypes. Fruit from the ABA treated pg/exp fruit had cell walls with less water-soluble and more ionically and covalently-bound pectins than fruit from the other lines, demonstrating that ripening-related disassembly of the fruit cell wall, but not elimination of SlGLK2, influences cracking. Cracking incidence was significantly correlated with cell wall and wax thickness, and the content of cell wall protopectin and cellulose, ... Mostrar Tudo |
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Palavras-Chave: |
Proteínas poligalacturonase. |
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Thesagro: |
Distúrbio Fisiológico; Hortaliça; Tomate. |
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Thesaurus NAL: |
Fruit cracking; Horticultural crops. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/192159/1/Tonetto.pdf
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Marc: |
LEADER 02431naa a2200313 a 4500
001 2105533
005 2020-01-21
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1038/s41438-018-0105-3$2DOI
100 1 $aJIANG, F.
245 $aDisassembly of the fruit cell wall by the ripening-associated polygalacturonase and expansin in fluences tomato cracking.$h[electronic resource]
260 $c2019
520 $aFruit cracking is an important problem in horticultural crop production. Polygalacturonase (SlPG) and expansin (SlEXP1) proteins cooperatively disassemble the polysaccharide network of tomato fruit cell walls during ripening and thereby, enable softening. A Golden 2-like (GLK2) transcription factor, SlGLK2 regulates unripe fruit chloroplast development and results in elevated soluble solids and carotenoids in ripe fruit. To determine whether SlPG, SlEXP1, or SlGLK2 influence the rate of tomato fruit cracking, the incidence of fruit epidermal cracking was compared between wild-type, Ailsa Craig (WT) and fruit with suppressed SlPG and SlEXP1 expression (pg/exp) or expressing a truncated nonfunctional Slglk2 (glk2). Treating plants with exogenous ABA increases xylemic flow into fruit. Our results showed that ABA treatment of tomato plants greatly increased cracking of fruit from WT and glk2 mutant, but not from pg/exp genotypes. The pg/exp fruit were firmer, had higher total soluble solids, denser cell walls and thicker cuticles than fruit of the other genotypes. Fruit from the ABA treated pg/exp fruit had cell walls with less water-soluble and more ionically and covalently-bound pectins than fruit from the other lines, demonstrating that ripening-related disassembly of the fruit cell wall, but not elimination of SlGLK2, influences cracking. Cracking incidence was significantly correlated with cell wall and wax thickness, and the content of cell wall protopectin and cellulose, but not with Ca2+ content.
650 $aFruit cracking
650 $aHorticultural crops
650 $aDistúrbio Fisiológico
650 $aHortaliça
650 $aTomate
653 $aProteínas poligalacturonase
700 1 $aLOPEZ, A.
700 1 $aJEON, S.
700 1 $aFREITAS, S. T. de
700 1 $aYU, Q.
700 1 $aWU, Z.
700 1 $aLABAVITCH, J. M.
700 1 $aTIAN, S.
700 1 $aPOWELL, A. L. T.
700 1 $aMITCHAM, E.
773 $tHorticulture Research$gv. 6, p. 1-15, 2019.
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