| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Phosphorus accumulation in a southern Brazilian Ultisol amended with pig manure for nine years
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| Autores: |
Tiecher,Tales
Brunetto,Gustavo
Rheinheimer,Danilo
Gatiboni,Luciano Colpo
Comin,Jucinei José
Schmitt,Djalma Eugênio
Tiecher,Tadeu Luis
Ambrosini,Vítor Gabriel
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| Data: |
2021-01-01
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| Ano: |
2021
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| Palavras-chave: |
P-NMR
Organic P
Manure
Orthophosphate
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| Resumo: |
ABSTRACT: This study evaluated P pools after nine years of successive application of either pig slurry (PS) or deep pig litter (DL) in a no-till Ultisol from southern Brazil. The experiment was established in Dec 2002 with the treatments control, application of 90 and 180 kg N ha−1 N as PS and as DL. In Mar 2010, soil samples were taken at six layers up to 30 cm deep. Total organic and inorganic P were assessed by the ignition method, and P compounds classes were evaluated by 31P-NMR spectroscopy. Total soil P increased proportionally with the P amount applied via DL and PS. Only DL application increased soil organic P, mainly at the highest dose and in the uppermost soil layers. The application of high doses of manure to these soils under no-till to meet crop N demands significantly increased P accumulation at the soil surface, especially with DL. This, in turn, increases the risk of contamination of water bodies due to P transfer from soil to rivers via runoff. The ignition method overestimates organic P compared to P-NMR. The highest proportion of organic P estimated by the ignition and P-NMR methods, at surface layers in the control suggests that inorganic P is added to the plots treated, increasing inorganic P and decreasing organic P. Moreover, with no P additions to the control, inorganic soil P is removed by plants, causing an apparent increase in the organic P proportion.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000301403
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/1678-992x-2019-0157
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.78 n.3 2021
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| Direitos: |
info:eu-repo/semantics/openAccess
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