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[1]REN Zeying,ZHAO Yonggang,Lv Yinyan,et al.Analysis on Soil Aggregate Stability of Preferential Flow and Matrix Flow Domains Under Different Land Use Types in the Lower Reaches of Fen River Watershed[J].Research of Soil and Water Conservation,2022,29(06):59-64.

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Analysis on Soil Aggregate Stability of Preferential Flow and Matrix Flow Domains Under Different Land Use Types in the Lower Reaches of Fen River Watershed

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 06 Page number: 59-64 Column: Public date: 2022-10-20

Title:: Analysis on Soil Aggregate Stability of Preferential Flow and Matrix Flow Domains Under Different Land Use Types in the Lower Reaches of Fen River Watershed

Author(s):: REN Zeying¹, ZHAO Yonggang¹, Lv Yinyan², SHANG Yueting³, WANG Yongbin⁴, HAN Lele¹, LIU Xiaofang¹; (1.School of Life Science, Shanxi Normal University, Linfen, Shanxi 041000, China; 2.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 4.Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

Keywords:: soil physics; preferential flow; dye staining; Le Bissonnais method; soil aggregate stability

CLC:: S152.4

DOI:: -

Abstract:: Preferential flow is a common heterogeneous phenomenon of movement of water and solute in soil. However, the difference of soil aggregate stability between preferential flow domain and matrix flow domain are still unclear. In order to clarify the difference of soil aggregate fragmentation mechanism, soil dyeing percentage and aggregate stability in preferential flow and matrix flow domain were analyzed by using dye tracer in field and Le Bissonnais(LB)method in this study. The results showed that soil dyeing percentage mainly distributed in 0—30 cm soil depth, and orchard had a significantly higher values than abandoned land in 10—30 cm depth; the macro-aggregate(>0.25 mm)content and mean weight diameter(MWD)with LB treatments had similar change trends in the order: orchard>farmland>abandoned land, while the relative slaking index(RSI)and relative mechanical breakdown index(RMI)had the opposite tendency; in 10—20 cm soil depth, the preferential flow domain had stronger aggregate stability and resistance to slaking and mechanical breakdown than the matrix flow domain; soil dyeing percentage was negatively correlated with MWD and positively correlated with RSI. These results suggest that orchard had better preferential flow characteristics and aggregate stability than farmland and abandoned land, and the resistance to aggregates slaking and mechanical breakdown of preferential flow domain was stronger than that of matrix flow domain, which was beneficial for maintaining the stability of preferential flow path.

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Last Update: 2022-10-20