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Registro Completo |
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
11/09/1995 |
Data da última atualização: |
30/07/2019 |
Autoria: |
FLOSS, E. L.; CARVALHO, F. I. F. de; FEDERIZZI, L. C.; MOR, M.; MOREIRA, J. C. S.; JASTER, F.; BOLLER, W.; FONSECA, P.; ZAMBRA, J. |
Afiliação: |
João Carlos Soares Moreira. |
Título: |
Ensaio regional de rendimento de grãos de aveia em 1980. |
Ano de publicação: |
1981 |
Fonte/Imprenta: |
In: UNIVERSIDADE DE PASSO FUNDO. Faculdade de Agronomia. Resultados de pesquisa em aveia obtidos em 1980. Passo Fundo, 1981. |
Páginas: |
p. 37-54 |
Série: |
(UPF-Agronomia. Boletim de Pesquisa, 4). |
Idioma: |
Português |
Thesaurus Nal: |
Oats. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00728naa a2200241 a 4500 001 1822758 005 2019-07-30 008 1981 bl uuuu u00u1 u #d 100 1 $aFLOSS, E. L. 245 $aEnsaio regional de rendimento de grãos de aveia em 1980. 260 $c1981 300 $ap. 37-54 490 $a(UPF-Agronomia. Boletim de Pesquisa, 4). 650 $aOats 700 1 $aCARVALHO, F. I. F. de 700 1 $aFEDERIZZI, L. C. 700 1 $aMOR, M. 700 1 $aMOREIRA, J. C. S. 700 1 $aJASTER, F. 700 1 $aBOLLER, W. 700 1 $aFONSECA, P. 700 1 $aZAMBRA, J. 773 $tIn: UNIVERSIDADE DE PASSO FUNDO. Faculdade de Agronomia. Resultados de pesquisa em aveia obtidos em 1980. Passo Fundo, 1981.
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Embrapa Trigo (CNPT) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
09/08/2004 |
Data da última atualização: |
09/05/2005 |
Autoria: |
SISTI, C. P. J.; SANTOS, H. P. dos; KOHHANN, R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
Título: |
Change in carbon and nitrogen stocks in soil under 13 years of conventional or zero tillage in southern Brazil. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 76, p. 39-58, 2004. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch) in the cropping system was the principal factor responsiblefor the observed C accumulation in the soil under ZT, and that most accumulated C was derived from crop roots. MenosThe objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch... Mostrar Tudo |
Palavras-Chave: |
C; Direct sowing; Maize; N; Rotational cropping; Wheats; Zero tillage. |
Thesagro: |
Adubação Verde; Avena Sativa; Carbono; Glycine Max; Matéria Orgânica; Milho; Nitrogênio; Plantio Direto; Rotação de Cultura; Soja; Solo; Trigo; Triticum Aestivum; Vicia Villosa; Zea Mays. |
Thesaurus NAL: |
carbon; green manures; nitrogen; organic matter; soil; soybeans. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02974naa a2200517 a 4500 001 1628145 005 2005-05-09 008 2004 bl --- 0-- u #d 100 1 $aSISTI, C. P. J. 245 $aChange in carbon and nitrogen stocks in soil under 13 years of conventional or zero tillage in southern Brazil. 260 $c2004 520 $aThe objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch) in the cropping system was the principal factor responsiblefor the observed C accumulation in the soil under ZT, and that most accumulated C was derived from crop roots. 650 $acarbon 650 $agreen manures 650 $anitrogen 650 $aorganic matter 650 $asoil 650 $asoybeans 650 $aAdubação Verde 650 $aAvena Sativa 650 $aCarbono 650 $aGlycine Max 650 $aMatéria Orgânica 650 $aMilho 650 $aNitrogênio 650 $aPlantio Direto 650 $aRotação de Cultura 650 $aSoja 650 $aSolo 650 $aTrigo 650 $aTriticum Aestivum 650 $aVicia Villosa 650 $aZea Mays 653 $aC 653 $aDirect sowing 653 $aMaize 653 $aN 653 $aRotational cropping 653 $aWheats 653 $aZero tillage 700 1 $aSANTOS, H. P. dos 700 1 $aKOHHANN, R. 700 1 $aALVES, B. J. R. 700 1 $aURQUIAGA, S. 700 1 $aBODDEY, R. M. 773 $tSoil & Tillage Research, Amsterdam$gv. 76, p. 39-58, 2004.
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