EFFECTS OF LAND USE MANAGEMENT ON SOIL ORGANIC CARBON, PARTICLE SIZE DISTRIBUTION AND AGGREGATE STABILITY ALONG HILLSLOPE IN SEMI-ARID AREAS OF NORTHERN KHORASAN

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BAGHERIFAM S.; KARIMI A.R.; LAKZIAN A.; IZANLOO E.

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Journal: Journal of Water and Soil Conservation Year:2013 | Volume:20 | Issue:4 Page(s): 51-73

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Title

EFFECTS OF LAND USE MANAGEMENT ON SOIL ORGANIC CARBON, PARTICLE SIZE DISTRIBUTION AND AGGREGATE STABILITY ALONG HILLSLOPE IN SEMI-ARID AREAS OF NORTHERN KHORASAN

Author(s)

BAGHERIFAM S. | KARIMI A.R. | LAKZIAN A. | IZANLOO E. | Issue Writer Certificate

Keywords

PRESERVED PASTUREQ2

SLOPE ASPECTQ2

SLOPE POSITIONQ1

SOIL ORGANIC MATTERQ2

MEAN WEIGH DIAMETERQ3

Abstract

Large areas of Iran are located in arid and semi-arid climatic regions and their soils are naturally subjected to erosion and degradation. Be aware of how management practices and topographic features influence soil organic carbon and aggregate stability is a very important issue from the land management point of view. In this study, four different land use management sites (PRESERVED PASTURE, grazing pasture, overgrazing pasture and rain fed lands) positioned in the hill slopes of Sisab experimental station (Bojnourd) were considered. In each site, soil samples from 0-15 cm of summit, backslope and toeslope in north and south-facing slopes were sampled. Soil samples were analyzed by using standard methods. The results showed that sand content in south-facing slopes was higher compare to north facing slopes, while silt content, soil organic carbon and mean weight diameter (MWD) were higher in north-facing slopes compared to south facing slopes. The maximum soil organic carbon and MWD were observed in the toeslope of north-facing slope while the minimum were monitored in backslope of south-facing slopes. The results also showed that sand content increased to 41 and 39% in overgrazing and grazing pastures respectively compared to PRESERVED PASTURE and clay content decreased by 6%. Soil organic carbon decreased from 9.6 (g kg-1) in PRESERVED PASTURE to 6.4, 8.2 and 9.1 (g kg-1) in cultivated land, overgrazing and grazing pastures, respectively. MWD decreased by 55, 35 and 17 percent in rain fed, overgrazing pasture and grazing pasture compared with PRESERVED PASTURE, respectively. Despite the strong correlation between MWD and soil organic carbon (R2=0.81) in all sites, the aggregate stability in north-facing slopes was mainly influenced by organic carbon while the role of calcium carbonate was notable in south-facing slopes.

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APA: Copy

BAGHERIFAM, S., KARIMI, A.R., LAKZIAN, A., & IZANLOO, E.. (2013). EFFECTS OF LAND USE MANAGEMENT ON SOIL ORGANIC CARBON, PARTICLE SIZE DISTRIBUTION AND AGGREGATE STABILITY ALONG HILLSLOPE IN SEMI-ARID AREAS OF NORTHERN KHORASAN. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 20(4), 51-73. SID. https://sid.ir/paper/156535/en

Vancouver: Copy

BAGHERIFAM S., KARIMI A.R., LAKZIAN A., IZANLOO E.. EFFECTS OF LAND USE MANAGEMENT ON SOIL ORGANIC CARBON, PARTICLE SIZE DISTRIBUTION AND AGGREGATE STABILITY ALONG HILLSLOPE IN SEMI-ARID AREAS OF NORTHERN KHORASAN. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2013;20(4):51-73. Available from: https://sid.ir/paper/156535/en

IEEE: Copy

S. BAGHERIFAM, A.R. KARIMI, A. LAKZIAN, and E. IZANLOO, “EFFECTS OF LAND USE MANAGEMENT ON SOIL ORGANIC CARBON, PARTICLE SIZE DISTRIBUTION AND AGGREGATE STABILITY ALONG HILLSLOPE IN SEMI-ARID AREAS OF NORTHERN KHORASAN,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 20, no. 4, pp. 51–73, 2013, [Online]. Available: https://sid.ir/paper/156535/en

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