Characteristic of PM10 Emission of Cultivated Soil in Ecotone between Agriculture and Animal Husbandry

doi:10.7522/j.issn.1000-694X.2016.00104

JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (6): 1079-1084.DOI: 10.7522/j.issn.1000-694X.2016.00104

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Characteristic of PM₁₀ Emission of Cultivated Soil in Ecotone between Agriculture and Animal Husbandry

Nan Ling^1,2, Dong Zhibao^1,3, Xiao Fengjun¹

1. School of Geography and Tourism, Shaanxi Normal University, Xi'an 710062, China;
2. Research Center for Western Development, Ningxia University, Yinchuan 750021;
3. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2016-05-23 Revised:2016-07-22 Online:2017-11-20 Published:2017-11-20

Abstract

Abstract: Dust emission is a process triggered by wind erosion to deteriorate atmospheric environmental quality. By taking cultivated soils from sandy area and no-sandy area in the ecotone between agriculture and animal husbandry as research object, we monitored concentration of PM₁₀ in the wind-flow emitted from soil surface in wind tunnel simulation experiment. In order to understand the mechanic of PM₁₀ emission during the wind erosion, we analyzed the characteristic and regularity of temporal variation of PM₁₀. The following conclusions have been obtained: wind erosion rate of cultivated soils from no-sandy area is much lower than sandy area while there is a exponential function relationships between wind erosion rate and wind speed; Being mainly aroused by the direct suspension, the average PM₁₀ flux of cultivated soils from no-sandy area linearly increase with increasing wind speed, and maximum PM₁₀ flux of those soils increase in a power function trend with wind speed. Resulted from uplift by combination of direct suspension and saltation, the average PM₁₀ flux of soils from sandy area is much higher than those from no-sandy area while maximum PM₁₀ flux increase is low. For all soil samples, there is a logarithm function relationship between average PM₁₀ flux and wind erosion rate.

Key words: ecotone between agriculture and animal husbandry, cultivated soil, wind erosion, PM₁₀ emission

CLC Number:

X169

Nan Ling, Dong Zhibao, Xiao Fengjun. Characteristic of PM₁₀ Emission of Cultivated Soil in Ecotone between Agriculture and Animal Husbandry[J]. JOURNAL OF DESERT RESEARCH, 2017, 37(6): 1079-1084.

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Characteristic of PM₁₀ Emission of Cultivated Soil in Ecotone between Agriculture and Animal Husbandry

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