Notice of retraction
Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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S&M2454 Research Paper of Special Issue

Effects of Freeze–Thaw Cycles on Soil Properties and Carbon Distribution in Saline-alkaline Soil of Wetland

Qian Liu, Jie Tang, Cheng Shuai He, Yang Long, and Chia-Chun Wu

(Received May 12, 2020; Accepted December 2, 2020)

Keywords: freeze–thaw, saline-alkali wetland, active organic carbon, physical and chemical properties

The effects of freeze–thaw cycles on the physicochemical properties and carbon components in saline-alkali wetland soil were investigated. The results showed that the water content and bulk density of the soil increased, while soil pH decreased with increasing number of freeze–thaw cycles. Organic carbon content in the soil was not significantly affected by the freeze–thaw cycles. In contrast, water-soluble organic carbon (WSOC), microbial biomass carbon (MBC), and readily oxidized organic carbon (ROOC) contents were significantly affected by the cycles. The various carbon contents showed a common tendency to increase first and then decrease steadily with repeated cycles; the change in carbon content was stable after several freeze–thaw cycles. The correlation between soil organic carbon and active carbon components was significant within the temperature range of −5–5 ℃. However, the correlation became significant only after the first cycle. Repeated cycles and low freeze–thaw temperatures seem to affect the redistribution of carbon components in the soil. The results of this study provide basic data to support the accurate estimation of the effects of freeze–thaw cycles on soil carbon pools in saline-alkali wetlands and to reveal the responses of soil physical and chemical properties and active carbon components to the cumulative effects of freeze–thaw cycles.

Corresponding author: Jie Tang, Chia-Chun Wu




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