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Dimas Augusto Morozin Zaia; Henrique de Santana; Cássia Thais Bussamra Vieira Zaia; Luís Ramon Moreno Toni
Semina. Ciências exatas e tecnológicas, 03/2009, Letnik: 30, Številka: 1Journal Article
The main goal of this paper is to study the effect of wet/dry season and the depth on several parameters of the forest soil. This work has shown that the concentration of Al3+ increases and that the concentration of exchangeable cations (Ca2+, Mg2+) and pHs (distilled water and CaCl2) decreases with the increase in depth and that these results are correlated. The concentrations of exchangeable cations (Al3+, Ca2+, Mg2+) and organic matter (OM) are affected by dry/wet season. Rain increases the solubility of organic carbon, thus decreasing OM and releasing exchangeable cations (Al3+, Ca2+, Mg2+). P (available) shows an increase in its concentration with an increase in depth. The low concentration of P (available) in the soil samples could be due to the low pH of the soils. The value of pHpzc is influenced by exchangeable cations (Al3+, Ca2+, Mg2+), and the pHs (CaCl2 and distilled water) are higher than pHpzc. This means that the net charge of these soils is negative. CEC and CECpotential decrease with the increase in depth in most soil samples. For mostly of the samples, the season (wet/dry) does not affect CEC, CECpotential, K+, or Na+.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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