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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Induced biological soil crust controls on wind erodibility and dust (PM10) emissions
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Induced biological soil crust controls on wind erodibility and dust (PM10) emissions

机译：风蚀和灰尘（PM10）排放诱导生物土壤地壳控制

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摘要

Inducing biological soil crust (biocrust) development is an appealing approach for dust mitigation in drylands due to the resistance biocrusts can provide against erosion. Using a portable device, we evaluated dust emissions from surfaces either inoculated with biocrust, amended with a plant-based soil stabilizer, or both at varying wind friction velocities. Four months after application, emissions from all treatments were either indistinguishable from or greater than controls, despite evidence of biocrust establishment. All treatments had greater surface roughness and showed more evidence of entrapment of windblown sediment than controls, factors which may have been partially responsible for elevated emissions. There was a synergistic effect of inoculation and stabilizer addition, resulting in a nearly two-fold reduction in estimated emissions compared to either treatment alone. Stepwise regression analysis indicated that variables associated with surface crust strength (aggregate stability, penetration resistance) were negatively associated with emissions and variables associated with sediment supply (sand content, loose sediment cover) were positively associated with emissions. With more time to develop, the soil-trapping activity and surface integrity of biocrust inoculum and soil stabilizer mixtures is expected to increase with the accumulation of surface biomass and enhancement of roughness through freeze-thaw cycles. (c) 2019 John Wiley & Sons, Ltd.
机译：诱导生物土壤地壳（生物教）开发是一种吸引人造成的旱地灰尘缓解的吸引力，由于抗抗侵蚀性能可以提供侵蚀。使用便携式设备，我们评估了从植物接种的表面的灰尘排放，用植物的土壤稳定剂修正，或者在不同的风摩擦速度下。尽管有证据表明，申请四个月以后，所有治疗的排放都无法区分或大于控制。所有治疗的表面粗糙度更大，并且显示出比对照的覆盖的更多证据，这些沉积物可能部分负责升高排放的因素。与单独的任一治疗相比，接种和稳定剂的加入产生了协同效应，导致估计的排放近似两倍。逐步回归分析表明，与表面地壳强度（聚集稳定性，渗透率）相关的变量与与沉积物供应（砂含量，松散的沉积物覆盖）相关的排放和变量对排放产生阳性相关。随着更多时间的发展，预计生物诱导含量和土壤稳定剂混合物的土壤捕获活动和表面完整性随着表面生物质的积累和通过冻融循环的增强而增加。 （c）2019 John Wiley＆Sons，Ltd。

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