[1]YIN Minfeng,TANG Yao,ZHANG Jiaqiong,et al.Distribution Characteristics of Beryllium-7 in Representative Soil Types in the Wind-Water Erosion Crisscross Region of the Loess Plateau[J].Research of Soil and Water Conservation,2021,28(04):1-7.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 04
Page number:
1-7
Column:
Public date:
2021-08-10
- Title:
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Distribution Characteristics of Beryllium-7 in Representative Soil Types in the Wind-Water Erosion Crisscross Region of the Loess Plateau
- Author(s):
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YIN Minfeng1, TANG Yao1, ZHANG Jiaqiong1,2, YANG Mingyi1,2, DENG Xinxin1
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(1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shannxi 712100, China)
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- Keywords:
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beryllium-7 measurements; beryllium-7 distribution in soil profile; relaxation mass depth; wind-water erosion crisscross region
- CLC:
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S157
- DOI:
-
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- Abstract:
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In order to clarify the feasibility of beryllium-7 to soil erosion study for different types of soils in the wind-water erosion crisscross region of the Loess Plateau, we analyzed seasonal variation of beryllium-7 distribution in soil profile, and the relaxation mass depth of four typical local soils(silty clay, sand, sandy loam and soil loam. Results show that beryllium-7 distribution in soil profile is affected by both soil type and seasonal variation, and is closely related with soil clay content regardless of variation of windy and rainy seasons. The soil relaxation mass depth as one of the key factors for beryllium-7 distribution in soil profile is negatively linearly correlated with the clay content(R2>0.87). Moreover, the soil mass relaxation depth is greater in dry season compared to rainy season for all studied soil types, which results in feasibility of beryllium-7 measurements for soil wind and water erosion study in this multiple agents affecting region supporting by local obvious separate of dry and rainy season. However, higher erosion rate and characteristics of sandy soil with the high sand fraction are significantly disparate from those of the other 3 types of soils, particularly. gravity erosion characteristics of sandy soil obviously presents in water erosion process. Therefore, beryllium-7 measurement is suitable for tracing wind and water erosion of all three soil types, and is hardly suitable for tracing wind and water erosion of sandy soil.