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首页> 外文期刊>Soil Horizons >Long-term effects of compaction on soil properties along the Mormon Trail, south-central Iowa, USA.
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Long-term effects of compaction on soil properties along the Mormon Trail, south-central Iowa, USA.

机译：压实对沿美国爱荷华州中南部摩门径的土壤性质的长期影响。

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摘要

The literature contains many studies addressing various aspects of soil compaction, but few of those studies address long-term (>30 yr), natural recovery of the soil from compaction. Here, natural soil recovery over a 146-yr period is investigated by comparing the properties of Sharpsburg soils in the Mormon Trail to those alongside the trail at a location in south-central Iowa. Bulk density samples were collected using rings of known volume for the upper 20 cm of the soil in 5-cm depth increments. Bulk soil samples were collected to a depth of 20 cm in 5-cm depth increments, and additional samples collected to 45 cm with a 5-cm-diameter Giddings probe in 5-cm depth increments. These samples were analyzed for total C, N, and particle size. The thickness of the A horizon was determined from core samples, and saturated hydraulic conductivity was measured using an Amoozemeter. Bulk density is lower in the 5- to 10-, 10- to 15-, and 15- to 20-cm depth intervals in the off-trail soils. Soil carbon levels and C/N ratios are higher in the off-trail soils for all sampled depth intervals below the 5- to 10-cm depth interval. A horizons were thicker and saturated hydraulic conductivity higher in the off-trail soils. These results indicate the soils on the Mormon Trail have not recovered from compaction at this site.CAS Registry Numbers 7440-44-0 7727-37-9
机译：文献中有许多涉及土壤压实的各个方面的研究，但是这些研究很少涉及压实的土壤的长期（> 30年）自然恢复。在这里，通过将摩门教道中的Sharpsburg土壤与爱荷华州中南部某处的沿道土壤进行比较，研究了146年期间的自然土壤恢复情况。使用已知体积的环以5厘米深度的增量收集土壤上部20厘米的体积密度样品。散装土壤样品以5厘米深度的增量收集到20厘米的深度，其他样品以5厘米深度的增量用直径为5厘米的Giddings探针收集到45厘米。分析这些样品的总C，N和粒径。由岩心样品确定A层的厚度，并使用Amoozemeter测量饱和的水力传导率。在越野土壤中，土壤的密度在5到10厘米，10到15厘米和15到20厘米的深度范围内较低。在5到10厘米深度间隔以下的所有采样深度间隔中，越野土壤中的土壤碳水平和C / N比都较高。越野土壤中的层位较厚，饱和导水率较高。这些结果表明摩门径上的土壤尚未从该地点的压实中恢复.CAS登记号7440-44-0 7727-37-9

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