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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
01/10/1997 |
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Data da última atualização: |
01/10/1997 |
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Autoria: |
EGGINTON, G. M.; SMITH, K. A. |
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Título: |
Losses of nitrogen by denitrification from a grassland soil fertilizer with cattle slurry and calcium nitrate. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Journal of Soil Science, v.37, p.69-80, 1980. |
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Idioma: |
Inglês |
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Conteúdo: |
Losses of N by denitrification from an imperfectly drained grassland soil were measured by the acetylene-inhibition technique over a l-yr period, during which applications of up 200 kg ha-1 of N as cattle slurry or calcium nitrate were made. The quantities of N lost from nitrate-treated soil were much greater than from slury-treated areas and ranged up to 21% of the N applied. THe losses occurred predominantly over brief periods following fertilizer application in hte spring. Ratios of N released as N2 to that release as N2O increased as denitrification rates increased. The highest ratio recorded, 24 may have been a conservative estimate because inhibition of N2O reduction may not have been complete on all occasions. Increased respiration was observedin soil prohave been complete on all occasions. Increased respiration was observed in the soil profile as a result of adding C2H2. This effect should be taken into account in interpreting experiments using the C2H2-inhibition technique. |
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Palavras-Chave: |
Fertilizer; Grassland; Losses; Nitrato de calcio. |
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Thesagro: |
Desnitrificação; Esterco; Fertilizante; Nitrogênio; Pastagem. |
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Thesaurus Nal: |
calcium nitrate; denitrification; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01746naa a2200277 a 4500
001 1079020
005 1997-10-01
008 1980 bl --- 0-- u #d
100 1 $aEGGINTON, G. M.
245 $aLosses of nitrogen by denitrification from a grassland soil fertilizer with cattle slurry and calcium nitrate.
260 $c1980
520 $aLosses of N by denitrification from an imperfectly drained grassland soil were measured by the acetylene-inhibition technique over a l-yr period, during which applications of up 200 kg ha-1 of N as cattle slurry or calcium nitrate were made. The quantities of N lost from nitrate-treated soil were much greater than from slury-treated areas and ranged up to 21% of the N applied. THe losses occurred predominantly over brief periods following fertilizer application in hte spring. Ratios of N released as N2 to that release as N2O increased as denitrification rates increased. The highest ratio recorded, 24 may have been a conservative estimate because inhibition of N2O reduction may not have been complete on all occasions. Increased respiration was observedin soil prohave been complete on all occasions. Increased respiration was observed in the soil profile as a result of adding C2H2. This effect should be taken into account in interpreting experiments using the C2H2-inhibition technique.
650 $acalcium nitrate
650 $adenitrification
650 $anitrogen
650 $aDesnitrificação
650 $aEsterco
650 $aFertilizante
650 $aNitrogênio
650 $aPastagem
653 $aFertilizer
653 $aGrassland
653 $aLosses
653 $aNitrato de calcio
700 1 $aSMITH, K. A.
773 $tJournal of Soil Science$gv.37, p.69-80, 1980.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
