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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 7, issue 2
Solid Earth, 7, 549–556, 2016
https://doi.org/10.5194/se-7-549-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 7, 549–556, 2016
https://doi.org/10.5194/se-7-549-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 12 Apr 2016

Research article | 12 Apr 2016

Effect of soil coarseness on soil base cations and available micronutrients in a semi-arid sandy grassland

Linyou Lü1,2, Ruzhen Wang1, Heyong Liu1,3, Jinfei Yin1,4, Jiangtao Xiao1,4, Zhengwen Wang1, Yan Zhao2, Guoqing Yu2, Xingguo Han1, and Yong Jiang1 Linyou Lü et al.
  • 1State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • 2Institute of Sandyland Improvement and Utilization, Liaoning Academy of Agricultural Sciences, Fuxin 123000, China
  • 3Key Laboratory of Regional Environment and Eco-remediation, College of Environment, Shenyang University, Shenyang 110044, China
  • 4University of Chinese Academy of Sciences, Beijing 10049, China

Abstract. Soil coarseness is the main process decreasing soil organic matter and threatening the productivity of sandy grasslands. Previous studies demonstrated negative effect of soil coarseness on soil carbon storage, but less is known about how soil base cations (exchangeable Ca, Mg, K, and Na) and available micronutrients (available Fe, Mn, Cu, and Zn) response to soil coarseness. In a semi-arid grassland of Northern China, a field experiment was initiated in 2011 to mimic the effect of soil coarseness on soil base cations and available micronutrients by mixing soil with different mass proportions of sand: 0 % coarse elements (C0), 10 % (C10), 30 % (C30), 50 % (C50), and 70 % (C70). Soil coarseness significantly increased soil pH in three soil depths of 0–10, 10–20 and 20–40 cm with the highest pH values detected in C50 and C70 treatments. Soil fine particles (smaller than 0.25 mm) significantly decreased with the degree of soil coarseness. Exchangeable Ca and Mg concentrations significantly decreased with soil coarseness degree by up to 29.8 % (in C70) and 47.5 % (in C70), respectively, across three soil depths. Soil available Fe, Mn, and Cu significantly decreased with soil coarseness degree by 62.5, 45.4, and 44.4 %, respectively. As affected by soil coarseness, the increase of soil pH, decrease of soil fine particles (including clay), and decline in soil organic matter were the main driving factors for the decrease of exchangeable base cations (except K) and available micronutrients (except Zn) through soil profile. Developed under soil coarseness, the loss and redistribution of base cations and available micronutrients along soil depths might pose a threat to ecosystem productivity of this sandy grassland.

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Soil coarseness is the main process decreasing soil organic matter and threatening the productivity of sandy grasslands. Previous studies demonstrated negative effect of soil coarseness on soil carbon storage, but less is known about how soil base cations (exchangeable Ca, Mg, K, and Na) and available micronutrients (available Fe, Mn, Cu, and Zn) response to soil coarseness. In a semi-arid grassland of northern China, a field experiment was initiated in 2011 to solve this problem.
Soil coarseness is the main process decreasing soil organic matter and threatening the...
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