2007
DOI: 10.1590/s0103-84782007000100017
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Nutrientes na água para irrigação de arroz na Região Sul do Rio Grande do Sul, Brasil

Abstract: RESUMO A cultura do arroz irrigado apresenta baixa resposta à adubação em comparação com as culturas de sequeiro, cultivadas em solos com as mesmas características de fertilidade. Isto é causado, em parte, pelas transformações físico-químicas que ocorrem no solo devido ao alagamento

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Cited by 10 publications
(11 citation statements)
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“…Previous analysis of water from ponds and streams from Rio Grande do Sul presented mean pHs similar to those found in the different regions of this study (Rheinheimer & Souza, 2000;Diel et al, 2007;König et al, 2008;Pimenta et al, 2012;Silva et al, 2012), but in water used for human consumption from artesian wells, from the north central region minimum pH values were down to 4.4 and the maximum up to 10.0 (Rheinheimer & Souza, 2000).…”
Section: Discussionsupporting
confidence: 87%
See 1 more Smart Citation
“…Previous analysis of water from ponds and streams from Rio Grande do Sul presented mean pHs similar to those found in the different regions of this study (Rheinheimer & Souza, 2000;Diel et al, 2007;König et al, 2008;Pimenta et al, 2012;Silva et al, 2012), but in water used for human consumption from artesian wells, from the north central region minimum pH values were down to 4.4 and the maximum up to 10.0 (Rheinheimer & Souza, 2000).…”
Section: Discussionsupporting
confidence: 87%
“…, presented low levels in Rio Grande do Sul (Diel et al, 2007;Kochhann et al, 2013;Panizzon et al, 2013), in accordance with the mean low water hardness noted in this study.…”
Section: +supporting
confidence: 92%
“…A long-term study in two important river basins in the state of Rio Grande do Sul showed that soluble P levels in freshwater are two-fold higher than the eutrophication limit, and that these high P concentrations are due to nonpoint sources of pollution from agriculture (Diel et al, 2007;Marchezan et al, 2009;Pellegrini et al, 2010). The fact that farmers in Southern Brazil are gradually using broadcast surface P application, in order to reduce time spent on planting, increases the potential for runoff losses.…”
Section: Introductionmentioning
confidence: 99%
“…A ausência de correlação entre o teor de K disponível no solo e a produtividade de grãos da cultura tem sido atribuída a fatores como a entrada de K nas lavouras pela água de irrigação (Vahl 2004, Diel et al 2007), liberação de K dos minerais (não trocável ou estrutural) (Castilhos et al 1999 e sua difusão aumentada (Machado 1985), sendo que essas outras fontes e a ciclagem desse nutriente (Werle et al 2008) não costumam constar nos resultados da análise do solo, mas interferem na disponibilidade às plantas (Nachtigall & Vahl 1991b, Ferreira 2003, Scivittaro & Machado 2004.…”
Section: Key-wordsunclassified