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[1]Wang Di,Qian Jiaxin,Zhu Ni,et al.Effect of Plateau Pika Caves on Soil Infiltration and Mechanism[J].Research of Soil and Water Conservation,2024,31(05):243-249.[doi:10.13869/j.cnki.rswc.2024.05.008]

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Effect of Plateau Pika Caves on Soil Infiltration and Mechanism

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 05 Page number: 243-249 Column: Public date: 2024-08-10

Title:: Effect of Plateau Pika Caves on Soil Infiltration and Mechanism

Author(s):: Wang Di^1,2,3, Qian Jiaxin⁴, Zhu Ni⁴, Li Kexin⁴, Mao Jiayi⁴, Zhao Lirong⁴, Liu Yu^2,3,4; (1.Research Center of Soil and Water Conservation and Ecological Environment, Ministry of Education, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering......)

Keywords:: plateau pika cave; soil properties; soil infiltration; alpine meadow; Sanjiangyuan area

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2024.05.008

Abstract:: [Objective]The aims of this study are to investigate the effects of plateau sage grouse burrows on the infiltration performance of alpine meadow soils and its related factors, and to reveal its potential role on water cycling and soil hydrological functions in alpine meadow ecosystems. [Methods]Soil infiltration rates were measured by the single-loop method in different parts of alpine meadow plateau pika burrows, including the entrance(PE)and the burrow pathway(PB), and the control was an undisturbed alpine meadow(AM)with no distribution of plateau pika burrows. [Results](1)Compared with the native alpine meadow, the total porosity and capillary porosity of surface soil at the plateau pika cave entrance were significantly reduced by 4.69% and 16.27%, respectively, while the non-capillary porosity was significantly increased by 22.47%, and the mean weight diameters of aggregates at the entrance and burrow were significantly decreased by 20.09% and 9.45%, respectively. The soil organic matter content decreased significantly, and soil organic matter content of each part followed the order:native alpine meadow>burrow>entrance(p<0.05),(2)Compared with native alpine meadow, the initial infiltration rate of the cave entrance and burrow increased by 377.63% and 189.47%, respectively, and the stable infiltration rate increased by 314.29% and 220.00%(p<0.05).(3)Plateau pika caves promoted the soil infiltration performance mainly through the destruction of mattic layer roots, and root biomass was the dominant factor affecting initial and stable infiltration rates, with the standardized total effects of -0.717 and -0.539, respectively. To some extent, pika caves were conducive to the water conservation of alpine meadow ecosystem. [Conclusion]Sage-grouse burrows favor water circulation in alpine meadow ecosystems to a certain extent, but also damage the original soil structure of alpine meadows and exacerbate the risk of alpine meadow degradation.

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Last Update: 2024-08-10