ORIGINAL RESEARCH
Effects of Bentonite Addition on Sandy Soil
Chemistry in a Long-Term Plot Experiment (I);
Effect on Organic Carbon and Total Nitrogen
Janusz Czaban1, Grzegorz Siebielec2, Ewa Czyż2, Jacek Niedźwiecki2
1 Agricultural Microbiology Department,
2 Department of Soil Science, Erosion, and Land Protection
Institute of Soil Science and Plant Cultivation – State Research Institute,
Czartoryskich 8, 24-100 Puławy, Poland
2 Department of Soil Science, Erosion, and Land Protection
Institute of Soil Science and Plant Cultivation – State Research Institute,
Czartoryskich 8, 24-100 Puławy, Poland
Pol. J. Environ. Stud. 2013;22(6):1661-1667
KEYWORDS
ABSTRACT
In 0.8 m2 microplots, a very poor sandy soil that contained only traces of organic matter was enriched
with bentonite (BNT) at rates of 0, 3, 6, and 12 kg/m2. For 30 years the microplots were planted with differ-
ent crops and regularly enriched with mineral and organic fertilizers. For the next eight years the microplots
were left barren. The soils with BNT added contained significantly higher amounts of organic carbon (OC)
and total nitrogen than the control soil (CS). Furthermore, in comparison to CS, organic matter in the soil with
12 kg/m2 of BNT contained significantly more humins. Such durable stabilization of OC by BNT can be
important for processes of carbon sequestration in soil.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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