Water repellency of sandy soil as a function of hydrophobic concentration
DOI:
https://doi.org/10.4336/2011.pfb.31.65.01Keywords:
Hydrofobicity, Pinus taeda, WDPT.Abstract
Soil water repellency has been reported worldwide being most extremes cases observed in sandy soils. Soil water repellency is accepted to be caused by recovering of soil particles by hydrophobic compounds originated from plant decomposition. This work aimed to evaluate the influence of concentration of hydrophobic extracts from a forest soil under Pinus taeda on water repellency of sandy soil with different organic matter content. Hydrophobic compounds were extracted from a everely hydrophobic Lithosol, using chloroform:acetone, followed by isopropanol:ammonia. The water drops penetration time test (WDPT) was applied in dried samples under four temperatures, seven treatments (sand with 0%; 3%; 6.5%; 6.5% + 10% of humic acid (AH); 6,5% + 30% of AH; 6.5% + 50% of AH; and 10% of charcoal as organic matter), and three levels of hydrophobic extract. The extracted material induced hydrophobicity in all treatments, in variable intensity, but lower than those found in the original Lithosol. Treatments with extract level 1 (2.88 g kg-1) presented the highest times of water repellency.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2011 Yorleni Chang Cambronero, Claudia Maria Branco de Freitas Maia, Renato Antônio Dedecek, Fabrício Augusto Hansel
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The BRAZILIAN JOURNAL OF FORESTRY RESEARCH reserves the right to correct grammar, improve clarity, and impose PFB standard although respecting the author's style.
Final proof version will be sent to the correspondence author.
Published papers will become property of the BRAZILIAN JOURNAL OF FORESTRY RESEARCH.
Published papers may be used by the authors, without previous PFB authorization, allowed when source is cited.
Any mention of trademarks or methods do not imply in its recommended by the Editorial Committee.
The authors are the exclusive responsible for opinions and concepts developed in the manuscript.