AGGREGATE DISTRIBUTION OF ORGANIC C, L-GLUTAMINASE ACTIVITY AND AGGREGATE STABILITY AS AFFECTED BY SLOPE POSITION

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NAHIDAN S.; NOURBAKHSH F.; MOSADDEGHI M.R.

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Journal: Journal of Soil Management and Sustainable Production Year:2015 | Volume:5 | Issue:1 Page(s): 129-143

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Title

AGGREGATE DISTRIBUTION OF ORGANIC C, L-GLUTAMINASE ACTIVITY AND AGGREGATE STABILITY AS AFFECTED BY SLOPE POSITION

Author(s)

NAHIDAN S. | NOURBAKHSH F. | MOSADDEGHI M.R. | Issue Writer Certificate

Keywords

SLOPE POSITIONQ2

SOIL ORGANIC CQ2

L-GLUTAMINASE ACTIVITYQ2

MEAN WEIGHT DIAMETERQ2

Abstract

The location of extracellular enzyme activities in soil aggregates can be influenced by SLOPE POSITION. This study aims to determine the effect of SLOPE POSITION on aggregate distribution of organic C and L-GLUTAMINASE ACTIVITY. The soils were collected from different SLOPE POSITIONs (shoulder, backslope, footslope and toeslope) at two pasture ecosystems (Fereydoonshahr and Chelgerd, central Iran). A wet sieving procedure was used to separate soil aggregates and then MEAN WEIGHT DIAMETER (MWD) was calculated. SOIL ORGANIC C (SOC) and L-GLUTAMINASE ACTIVITY (LGL) were measured in the separated aggregates. Results indicated that SLOPE POSITION influenced aggregates distribution and stability through its effect on soil physico-chemical properties. The LGL activity was significantly influenced by SLOPE POSITION which was consistent with the pattern of SOC content (Fereydoonsahr: r=0.7, P<0.001; Chelgerd: r=0.8, P<0.001). The SOC and LGL decreased by 34 and 56% with decreasing the size of aggregates in Fereydoonshahre area and by 20 and 68% in Chelgerd area. Furthermore, SOC storage and LGL activity derived from macroaggregates decreased as the stability of aggregate decreased along the hill slope. Overall, topography (SLOPE POSITION) as a soil-forming factor can change the distribution of SOC and LGL activity in soil through its influence on aggregate distribution.

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APA: Copy

NAHIDAN, S., NOURBAKHSH, F., & MOSADDEGHI, M.R.. (2015). AGGREGATE DISTRIBUTION OF ORGANIC C, L-GLUTAMINASE ACTIVITY AND AGGREGATE STABILITY AS AFFECTED BY SLOPE POSITION. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, 5(1), 129-143. SID. https://sid.ir/paper/209917/en

Vancouver: Copy

NAHIDAN S., NOURBAKHSH F., MOSADDEGHI M.R.. AGGREGATE DISTRIBUTION OF ORGANIC C, L-GLUTAMINASE ACTIVITY AND AGGREGATE STABILITY AS AFFECTED BY SLOPE POSITION. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION[Internet]. 2015;5(1):129-143. Available from: https://sid.ir/paper/209917/en

IEEE: Copy

S. NAHIDAN, F. NOURBAKHSH, and M.R. MOSADDEGHI, “AGGREGATE DISTRIBUTION OF ORGANIC C, L-GLUTAMINASE ACTIVITY AND AGGREGATE STABILITY AS AFFECTED BY SLOPE POSITION,” ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, vol. 5, no. 1, pp. 129–143, 2015, [Online]. Available: https://sid.ir/paper/209917/en

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