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首页> 外文期刊>International Journal of Phytoremediation >Effect of Vegetation Rehabilitation on Soil Carbon and Its Fractions in Mu Us Desert, Northwest China
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Effect of Vegetation Rehabilitation on Soil Carbon and Its Fractions in Mu Us Desert, Northwest China

机译：植物康复对土壤中土壤碳及其馏分的影响

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摘要

Although vegetation rehabilitation on semi-arid and arid regions may enhance soil carbon sequestration, its effects on soil carbon fractions remain uncertain. We carried out a study after planting Artemisia ordosica (AO, 17 years), Astragalus mongolicum (AM, 5 years), and Salix psammophila (SP, 16 years) on shifting sand land (SL) in the Mu Us Desert, northwest China. We measured total soil carbon (TSC) and its components, soil inorganic carbon (SIC) and soil organic carbon (SOC), as well as the light and heavy fractions within soil organic carbon (LF-SOC and HF-SOC), under the SL and shrublands at depths of 100 cm. TSC stock under SL was 27.6 Mgha(-1), and vegetation rehabilitation remarkably elevated it by 40.6 Mgha(-1), 4.5 Mgha(-1), and 14.1 Mgha(-1) under AO, AM and SP land, respectively. Among the newly formed TSC under the three shrublands, SIC, LF-SOC and HF-SOC accounted for 75.0%, 10.7% and 13.1% for AO, respectively; they made up 37.0%, 50.7% and 10.6% for AM, respectively; they occupied 68.6%, 18.8% and 10.0% for SP, respectively. The accumulation rates of TSC within 0-100 cm reached 238.6 g m(-2)y(-1), 89.9 g m(-2)y(-1) and 87.9 g m(-2)y(-1) under AO, AM and SP land, respectively. The present study proved that the accumulation of SIC considerably contributed to soil carbon sequestration, and vegetation rehabilitation on shifting sand land has a great potential for soil carbon sequestration.
机译：虽然半干旱区植被康复可能增强土壤碳封存，但其对土壤碳馏分的影响仍然不确定。我们在种植Artemisia Ordosica（AO，17岁），黄芪蒙古（AO，5年）和Salix Psammophila（SP，16年）后进行了一项研究，在中国美国沙漠的穆美沙漠中的转移沙地（SL）。我们测量了整个土壤碳（TSC）及其组分，土壤无机碳（SIC）和土壤有机碳（SOC），以及土壤有机碳（LF-SOC和HF-SoC）中的轻质和重级分，下方SL和灌木丛处于100厘米的深度。 SL下的TSC股票为27.6兆瓦（-1），植被康复分别在AO，AM和SP土地下分别在40.6兆焦（-1），4.5兆瓦（-1）和14.1兆瓦（-1）下升高。在三个灌木丛中，SIC，LF-SOC和HF-SOC下的新形成的TSC分别占AO的75.0％，10.7％和13.1％;他们分别占AM的37.0％，50.7％和10.6％;它们分别占SP的68.6％，18.8％和10.0％。 TSC的累积率在0-100cm内达到238.6克（-2）y（-1），89.9gm（-2）y（-1）和87.9克（-2）y（-2）y（-2）y（-2）y（-2）y（-1）和SP土地。本研究证明，SIC的积累显着促进了土壤碳封存，换砂土壤的植被康复具有巨大的土壤碳封存潜力。

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