Analysis of Temporal Variation of Soil Salinity during the Growing Season in a Flooded Rice Field of Thessaloniki Plain-Greece

Agronomy

Emanuel Lekakis¹  Vassilis Aschonitis²  Athina Pavlatou-Ve³  Aristotelis Papadopoulos¹  Vassilis Antonopoulos³ 

[1] ELGO-DIMITRA, Soil Science Institute of Thessaloniki, Thermi 57001, Greece; E-Mails:;Department of Life Sciences and Biotechnology, University of Ferrara, Via L.Borsari 46, Ferrara 44121, Italy;Department of Hydraulics, Soil Science & Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece; E-Mails:

关键词: soil salinity;    suction cups;    saturation extract;    exchangeable cations;    water management;   

DOI  :  10.3390/agronomy5010035

来源: mdpi

【 摘 要 】

The effects of regional water management practices (WMPs) on the soil salinity of a representative rice field under Mediterranean conditions (Thessaloniki plain, Greece) were investigated. The temporal variation of soil salinity parameters in the soil solution and in the exchangeable phase was monitored at and below the root zone (15–20 and 35–40 cm) during the growing season. The comparative analysis (ANOVA for p = 0.05) of the measurements before and after the growing season showed that: (a) for the soil solution of the 15–20 cm layer, Ca²⁺, Mg²⁺, K⁺, HCO₃⁻ and EC were significantly reduced, Na⁺ remained constant and Cl⁻ increased, while in the 35–40 cm layer no significant differences were detected to all parameters except for Cl⁻ which was increased; (b) for the exchangeable cations Ca²⁺, Mg²⁺ and K⁺ no significant differences were found, while exchangeable Na⁺ and ESP were significantly increased in both soil layers during the short period of soil drying before harvest. The final values of Na⁺ and ESP were quite low to indicate soil degradation hazard. Overall the results showed adequate performance of WMPs to preserve a good soil salinity status but with the cost of high water consumption, exceeding 2000 mm.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.