Arid
DOI10.1016/j.jaridenv.2021.104514
Effect of biocrusts on profile distribution of soil water content and salinity at different stages of evaporation
Kakeh, Jalil; Gorji, Manouchehr; Mohammadi, Mohammad Hossein; Asadi, Hossein; Khormali, Farhad; Sohrabi, Mohammad
Corresponding AuthorMohammadi, MH (corresponding author), Univ Tehran, Coll Agr & Nat Resources, Fac Agr Engn & Technol, Dept Soil Sci & Engn, Daneshkadeh Ave, Karaj 3158777871, Iran.
JournalJOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
Year Published2021
Volume191
Abstract in EnglishIn this study, the effect of biocrusts on daily variations of evaporation in soils of an arid rangeland was investigated during 142 days. Temporal and spatial variations of soil water and solute content were analyzed in three times of 17, 50 and 103 days, and four depths of 10, 20, 30 cm and 40 cm in six columns (20 cm diameter x 50 cm height) containing biocrusts (43 cm saline soil + 5 cm biocrusts) and four columns filled with bare soil (48 cm saline soil) respectively. Temporal variation of evaporation rate was supposed as a 3-stages process. Results showed that stage 1 and stage 2 are not distinguishable. We further found that, compared to bare soil, the biocrusts retarded water evaporation from soil surface (24 vs. 30 mm and 34 vs. 44 mm after 17 and 50 days respectively), and reduced solute accumulation in top soil, especially in the stage 2 of evaporation process (5 vs. 8 dS/m and 13 vs. 20 dS/m after 17 and 50 days respectively). The effect of biocrusts on the evaporation rate at the stage 3 of evaporation was not significant (9 vs. 9 mm after 103 days). Reduction of evaporation by biocrusts resulted in less soil salinity within entire soil profile. The effects of biocrusts on evaporation reduction are attributed to i) the biocrusts create mats on the soil surface, and swelling of mats blocks the soil pores in wet condition, and ii) the large pores of biocrusts disrupt the hydraulic connectivity between topsoil and subsoil, which minimizes the capillary rise. Since major part of water is evaporated during stage 2, and is controlled by water flow within the soil and at the surface, so conservation of the BSCs would be important for preserving hydrological functions advantage such as reducing evaporation and enhancing water retention in the salt affected and dry soils.
Keyword in EnglishBiological soil crusts Dry land Soil salinization Soil solute dynamics Water preservation
SubtypeArticle
Language英语
Indexed BySCI-E
WOS IDWOS:000660573200003
WOS KeywordHYDRAULIC CONDUCTIVITY ; CRUSTS ; INFILTRATION ; DYNAMICS ; DESERT ; COMMUNITIES ; TRANSPORT
WOS SubjectEcology ; Environmental Sciences
WOS Research AreaEnvironmental Sciences & Ecology
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/350716
Affiliation[Kakeh, Jalil; Gorji, Manouchehr; Mohammadi, Mohammad Hossein; Asadi, Hossein] Univ Tehran, Dept Soil Sci, Karaj, Iran; [Khormali, Farhad] Gorgan Univ Agr Sci & Nat Resources, Dept Soil Sci, Gorgan, Golestan, Iran; [Sohrabi, Mohammad] Iranian Res Org Sci & Technol, Dept Biotechnol, Tehran, Iran
Recommended Citation
GB/T 7714
Kakeh, Jalil,Gorji, Manouchehr,Mohammadi, Mohammad Hossein,et al. Effect of biocrusts on profile distribution of soil water content and salinity at different stages of evaporation[J],2021,191.
APA Kakeh, Jalil,Gorji, Manouchehr,Mohammadi, Mohammad Hossein,Asadi, Hossein,Khormali, Farhad,&Sohrabi, Mohammad.(2021).Effect of biocrusts on profile distribution of soil water content and salinity at different stages of evaporation.JOURNAL OF ARID ENVIRONMENTS,191.
MLA Kakeh, Jalil,et al."Effect of biocrusts on profile distribution of soil water content and salinity at different stages of evaporation".JOURNAL OF ARID ENVIRONMENTS 191(2021).
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