Wind erosion and sand accumulation effects on soil properties in Horqin Sandy Farmland,Inner Mongolia |
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Authors: | Ha-Lin Zhao Xiao-Yong Yi Rui-Lian Zhou Xue-Yong Zhao Tong-Hui Zhang Sam Drake |
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Affiliation: | 1. Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, 260 Donggang West Road, 730000, Lanzhou, P.R. China;2. Office of Arid Lands Studies, University of Arizona, 1955 E. 6th Street, Tucson, AZ 85719, USA |
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Abstract: | Rain-fed agriculture is widespread in Inner Mongolia, northern China, where wind erosion of farmland is very common because of sandy soil and dry, windy weather. However, very little is known about the effects of wind erosion on soil physical and chemical properties in this region. A field experiment was conducted in sandy farmland, where erosional and depositional gradients were established to evaluate the effects of wind erosion and leeward sand accumulation on soil texture, nutrient content, soil water, and soil temperature. The research showed that long term wind erosion could result in significant soil coarseness, infertility and dryness. Severe erosion reduced clay by 59.6%, organic C by 71.2%, total N by 67.4%, total P by 31.4%, available N by 64.5%, available P by 38.8%, and average soil water content by 51.8%, compared with non-eroded farmland in the study region. The sand fraction (particles > 0.05 mm), pH and ground-surface temperature increased by 6.2%, 3.7%, and 2.2 °C, respectively. Accumulated sand also caused a decrease in nutrients and soil water content. Under severe sand accumulation, clay was reduced by 2.0%, organic C by 19.3%, total N by 21.7%, total P by 13.7%, available N by 52.5%, and average soil water content by 26.6%. The sand fraction, pH, available P, and ground-surface temperature increased by 0.2%, 0.9%, 5.8% and 2.8 °C, respectively. |
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Keywords: | Wind erosion Particle size distribution Soil nutrients Soil moisture Sandy farmland Inner Mongolia |
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