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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Trigo. |
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Data corrente: |
10/02/1993 |
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Data da última atualização: |
21/12/2011 |
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Autoria: |
FARIAS, J. G. |
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Título: |
Nitrogen availability from plant residues in selected oxisols and ultisols. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Gainesville: University of Florida, 1985. |
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Páginas: |
177 p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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Conteúdo: |
The extent of N mineralization from 15N-labelled plant residues with widely different C:N ratios, the N uptake from these residues by two upland rice crops, and the effects of previous fertility programs on the above parameters were studies using samples obtained from two long-term field experiments being conducted on two Brasilian Oxisols, i.e., an Acrustox and a Haplustox. In a glasshouse experiment, residues of grain sorghum (Sorghum bicolor (L.) Moench) and white clover (Trifolium repens L.), grown with 15N-ammonium sulphate, were added to soils from the above experiments and two crops of upland rice (Oryza sativa L.) were grown. The whole rice plant was harvested each time, with unlabelled rice residue replacing the harvested plants after the first crop. Dry matter yield, total Kjeldahl N (TKN), N uptake, and 15N recovery were evaluated for grain, root, and top portions of the plant. After two crops, the soils, were evaluated for the 15N-plant residue remaining in the soil and unaccounted for N. Carbon dioxide evalution from the original soil samples was also measured in laboratory incubation study. The legume residue consistently released N in larger quantity and more rapidly than grass residue. Delayed grass residue decomposition resulted frquently in higher yields in the second crop. Results suggested that plant 15N uptake depended upon the N content of the residue, while N losses were related to soil and environmental conditions. Carbon dioxide evolution from soil obtained from the cropped Acrustox treatments was lower than from the virgir soil. This was interpreted as a reduction in the more easily oxidizable portion of soil organic matter. This trend was more intensive for the low fertilization program. In the Haplustox soil, a trend was observed toward less CO2 evolution in those fertility programs where the crop residues had been removed. Clearing the native vegetation and plowing under the native grassland of the Haplustox soil produced CO2 evolution decrease as for a cropped fertility program with crop residue removed. In the cropped treatments of both Oxisols, N recovery from plant residues by two rice crops averaged 25% with legume residue and 9% with grass residue. Results suggest that leguminous plant residues can be an alternative N source for rice grown on these soils. MenosThe extent of N mineralization from 15N-labelled plant residues with widely different C:N ratios, the N uptake from these residues by two upland rice crops, and the effects of previous fertility programs on the above parameters were studies using samples obtained from two long-term field experiments being conducted on two Brasilian Oxisols, i.e., an Acrustox and a Haplustox. In a glasshouse experiment, residues of grain sorghum (Sorghum bicolor (L.) Moench) and white clover (Trifolium repens L.), grown with 15N-ammonium sulphate, were added to soils from the above experiments and two crops of upland rice (Oryza sativa L.) were grown. The whole rice plant was harvested each time, with unlabelled rice residue replacing the harvested plants after the first crop. Dry matter yield, total Kjeldahl N (TKN), N uptake, and 15N recovery were evaluated for grain, root, and top portions of the plant. After two crops, the soils, were evaluated for the 15N-plant residue remaining in the soil and unaccounted for N. Carbon dioxide evalution from the original soil samples was also measured in laboratory incubation study. The legume residue consistently released N in larger quantity and more rapidly than grass residue. Delayed grass residue decomposition resulted frquently in higher yields in the second crop. Results suggested that plant 15N uptake depended upon the N content of the residue, while N losses were related to soil and environmental conditions. Carbon dioxide evolution from soil ... Mostrar Tudo |
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Palavras-Chave: |
Arroz de terras altas; Plintossolo; Sorghum; Upland rice; White clover. |
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Thesagro: |
Cerrado; Nitrogênio; Oryza Sativa; Oxisol; Resíduo Orgânico; Sorghum Bicolor; Sorgo; Trevo Branco; Trifolium Repens. |
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Thesaurus Nal: |
Acrisols; crop residues; Ferralsols; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03212nam a2200349 a 4500
001 1547798
005 2011-12-21
008 1985 bl uuuu m 00u1 u #d
100 1 $aFARIAS, J. G.
245 $aNitrogen availability from plant residues in selected oxisols and ultisols.
260 $aGainesville: University of Florida$c1985
300 $a177 p.
500 $aPh.D. Thesis.
520 $aThe extent of N mineralization from 15N-labelled plant residues with widely different C:N ratios, the N uptake from these residues by two upland rice crops, and the effects of previous fertility programs on the above parameters were studies using samples obtained from two long-term field experiments being conducted on two Brasilian Oxisols, i.e., an Acrustox and a Haplustox. In a glasshouse experiment, residues of grain sorghum (Sorghum bicolor (L.) Moench) and white clover (Trifolium repens L.), grown with 15N-ammonium sulphate, were added to soils from the above experiments and two crops of upland rice (Oryza sativa L.) were grown. The whole rice plant was harvested each time, with unlabelled rice residue replacing the harvested plants after the first crop. Dry matter yield, total Kjeldahl N (TKN), N uptake, and 15N recovery were evaluated for grain, root, and top portions of the plant. After two crops, the soils, were evaluated for the 15N-plant residue remaining in the soil and unaccounted for N. Carbon dioxide evalution from the original soil samples was also measured in laboratory incubation study. The legume residue consistently released N in larger quantity and more rapidly than grass residue. Delayed grass residue decomposition resulted frquently in higher yields in the second crop. Results suggested that plant 15N uptake depended upon the N content of the residue, while N losses were related to soil and environmental conditions. Carbon dioxide evolution from soil obtained from the cropped Acrustox treatments was lower than from the virgir soil. This was interpreted as a reduction in the more easily oxidizable portion of soil organic matter. This trend was more intensive for the low fertilization program. In the Haplustox soil, a trend was observed toward less CO2 evolution in those fertility programs where the crop residues had been removed. Clearing the native vegetation and plowing under the native grassland of the Haplustox soil produced CO2 evolution decrease as for a cropped fertility program with crop residue removed. In the cropped treatments of both Oxisols, N recovery from plant residues by two rice crops averaged 25% with legume residue and 9% with grass residue. Results suggest that leguminous plant residues can be an alternative N source for rice grown on these soils.
650 $aAcrisols
650 $acrop residues
650 $aFerralsols
650 $anitrogen
650 $aCerrado
650 $aNitrogênio
650 $aOryza Sativa
650 $aOxisol
650 $aResíduo Orgânico
650 $aSorghum Bicolor
650 $aSorgo
650 $aTrevo Branco
650 $aTrifolium Repens
653 $aArroz de terras altas
653 $aPlintossolo
653 $aSorghum
653 $aUpland rice
653 $aWhite clover
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 8 | |
| 3. |  | FARIAS, J. G. de M.; COSTA NETO, P. F. da; ALMEIDA, S. C. P. de; SCORTECCI, K. C. Construção de bibliiotecas subtrativa de cDNA de mamona associados ao estresse hídrico. CONGRESSO BRASILEIRO DE MAMONA, 5.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 2.; FÓRUM CAPIXABA DE PINHÃO-MANSO, 1., 2012, Guarapari. Desafios e Oportunidades: anais. Campina Grande: Embrapa Algodão, 2012. p. 362| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Algodão. |
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| 5. | | COSTA NETO, P. F. da; ALMEIDA, S. C. P. de; FARIAS, J. G. de M.; SCORTECCI, K. C. Efeito do estresse hídrico em plantas de mamona (Ricinus communis L.) da cultivar BRS ENERGIA. In: CONGRESSO BRASILEIRO DE MAMONA, 5.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 2.; FÓRUM CAPIXABA DE PINHÃO-MANSO, 1., 2012, Guarapari. Desafios e Oportunidades: anais. Campina Grande: Embrapa Algodão, 2012. p. 155| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Algodão. |
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| 6. | | MIOTTO, A.; CERETTA, C. A.; BRUNETTO, G.; NICOLOSO, F. T.; GIROTTO, E.; FARIAS, J. G.; TIECHER, T. L.; CONTI, L. De; TRENTIN, G. Copper uptake, accumulation and physiological changes in adult grapevines in response to excess copper in soil. Plant and Soil, The Hague, v. 374, n. 1-2, p. 593-610, Jan. 2014. Publicada online em 24 de setembro.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| 7. | | BARRETO, K. F. M.; ARAÚJO, L. P. L.; ALMEIDA, S. C. P. de; FARIAS, J. G. de M.; COSTA NETO, P. F. da; UCHÔA, A. F.; SCORTECCI, K. C. Identificação de proteínas diferencialmente expressas em mamoneira submetida a estresse hídrico. CONGRESSO BRASILEIRO DE MAMONA, 5.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 2.; FÓRUM CAPIXABA DE PINHÃO-MANSO, 1., 2012, Guarapari. Desafios e Oportunidades: anais. Campina Grande: Embrapa Algodão, 2012. p. 378| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Algodão. |
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| 8. | | BRUNETTO, G.; ROSA, D. B.; AMBROSINI, V. G.; HEINZEN, J.; FERREIRA, P. A. A.; CERETTA, C. A.; SOARES, C. R. F. S.; MELO, G. W. B. de; SORIANI, H. H.; NICOLOSO, F. T.; FARIAS, J. G.; DE CONTI, L.; SILVA, L. O. S.; SANTANA, N.; COUTO, R. R.; JACQUES, R. J. S.; TIECHER, T. L. Use of phosphorus fertilization and mycorrhization as strategies for reducingcopper toxicity in young grapevines. Scientia Horticulturae, v. 248, p. 176-183, 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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