2011
DOI: 10.1590/s0100-40422011000100002
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Cargas superficiais da fração argila de solos influenciadas pela vinhaça e fósforo

Abstract: Recebido em 19/8/09; aceito em 28/7/10; publicado na web em 16/11/10 SURFACE CHARGE OF CLAY FRACTION AS AFFECTED BY VINASSE AND PHOSPHORUS. Effects of vinasse, P sorption and the interaction vinasse-phosphorus on zeta potential and point of zero charge (PZC) as well as the effects of vinasse on P sorption on clay-fraction samples from two soils were evaluated. The vinasse and P sorption influenced the surface charge of clay fraction of both soils. Sorption of P increased negative charges from soil particles re… Show more

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Cited by 16 publications
(13 citation statements)
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“…It appears that there is a relationship between the amount of P-sorbed ( Figure 1) and clay content (Table 2), in which the highest levels of P-sorbed were found in TH,TP 1 , TP 2 and RA with values exceeding 1000 mg kg -1 . However, this relationship is not constant, considering that if there were proportionality between clay and sorption, the highest sorption would occur in TP 1 and RA soils, indicating that other factors also interfere in the sorption of P by these soils (EBERHARDT et al, 2008;RIBEIRO et al, 2011).…”
Section: Resultsmentioning
confidence: 99%
“…It appears that there is a relationship between the amount of P-sorbed ( Figure 1) and clay content (Table 2), in which the highest levels of P-sorbed were found in TH,TP 1 , TP 2 and RA with values exceeding 1000 mg kg -1 . However, this relationship is not constant, considering that if there were proportionality between clay and sorption, the highest sorption would occur in TP 1 and RA soils, indicating that other factors also interfere in the sorption of P by these soils (EBERHARDT et al, 2008;RIBEIRO et al, 2011).…”
Section: Resultsmentioning
confidence: 99%
“…A KO deixa de reproduzir pontos específicos da variabilidade espacial dos teores dos óxidos de Fe, que podem ser considerados importantes, pois estes podem apresentar elevada capacidade de fixação de fósforo; em locais com maior proporção desses óxidos, exigemse adubações fosfatadas em maior quantidade e, ou, com maior frequência para propiciar disponibilidades adequadas deste nutriente para as plantas (Almeida et al, 2003;Fernández R. et al, 2008;Ribeiro et al, 2011).…”
Section: Resultsunclassified
“…The explanation for this is that most of the catchment area is under pasture (Figure 2D), managed without fertilizer addition, in soils that are naturally poor in P ( Figure 5A), and with high capacity to adsorb P (mainly the PVA and CX - Figure 2C). Several authors highlight the low availability of P in tropical soils, as well as the high adsorption capacity of Fe and Al oxides (Fink et al, 2014;Pozza et al, 2007;Ribeiro et al, 2011).…”
Section: P Index For Current Land Usementioning
confidence: 99%