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| Titel |
Furfural and its biochar improve the general properties of a saline soil |
| VerfasserIn |
Y. Wu, G. Xu, H. B. Shao |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 2 ; Nr. 5, no. 2 (2014-07-17), S.665-671 |
| Datensatznummer |
250115316
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| Publikation (Nr.) |
 copernicus.org/se-5-665-2014.pdf |
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| Zusammenfassung |
| Organic materials (e.g., furfural residue) are generally
believed to improve the physical and chemical properties of saline soils
with low fertility. Recently, biochar has been received more attention as a
possible measure to improve the carbon balance and improve soil quality in
some degraded soils. However, little is known about their different
amelioration of a sandy saline soil. In this study, 56 d incubation
experiment was conducted to evaluate the influence of furfural and its
biochar on the properties of saline soil. The results showed that both
furfural and biochar greatly reduced pH, increased soil organic carbon (SOC)
content and cation exchange capacity (CEC), and enhanced the available
phosphorus (P) in the soil. Furfural is more efficient than biochar in
reducing pH: 5% furfural lowered the soil pH by 0.5–0.8 (soil pH:
8.3–8.6), while 5% biochar decreased by 0.25–0.4 due to the loss of
acidity in pyrolysis process. With respect to available P, furfural addition
at a rate of 5% increased available P content by 4–6 times in comparison
to 2–5 times with biochar application. In reducing soil exchangeable sodium
percentage (ESP), biochar is slightly superior to furfural because soil ESP
reduced by 51% and 43% with 5% furfural and 5% biochar at the end
of incubation. In addition, no significant differences were observed between
furfural and biochar about their capacity to retain N, P in leaching
solution and to increase CEC in soil. These facts may be caused by the
relatively short incubation time. In general, furfural and biochar exhibited
a different effect depending on the property: furfural was more effective
in decreasing pH and increasing available P, whereas biochar played a more
important role in increasing SOC and reducing ESP of saline soil. |
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