Data/hora: 02/06/2024 05:12:20

Provedor de dados: | 63
País: | Brazil
Título: | Phosphorus accumulation in a southern Brazilian Ultisol amended with pig manure for nine years
Autores: | Tiecher,Tales; Brunetto,Gustavo; Rheinheimer,Danilo; Gatiboni,Luciano Colpo; Comin,Jucinei José; Schmitt,Djalma Eugênio; Tiecher,Tadeu Luis; Ambrosini,Vítor Gabriel.
Data: | 2021-01-01
Ano: | 2021
Palavras-chave: | P-NMR; Organic P; Manure; Orthophosphate.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000301403
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/1678-992x-2019-0157
Formato: | text/html
Fonte: | Scientia Agricola  v.78 n.3 2021
Fonte: | info:eu-repo/semantics/openAccess