Wind erosion effects on soil texture and organic matter
Wind erosion effects on soil texture and organic matter
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DOI：
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发表时间：
1986-05
影响因子：
3.9
通讯作者：
L. Lyles;J. Tatarko
中科院分区：
文献类型：
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作者：
L. Lyles;J. Tatarko
摘要：1984年，对1948年在堪萨斯西部取样的10个土壤点进行了重新取样，以比较顶部10 cm处的粒度分布（质地）和有机质含量。除一个地点外，砂粒含量有所增加;增幅范围为0.9至23.3个百分点。最大的变化发生在中等粗糙和粗糙质地（桑迪）土壤。颗粒分布的总体变化分别为+6.5、-7.2和+0.7个百分点，分别为沙子、粉土和粘土，表明粉土是通过风力分选而被去除的。10个地点中有8个地点的有机质下降，平均整体下降约19%，每年下降约0.01个百分点。侵蚀或其他因素导致这些土壤中的淤泥含量和有机质缓慢下降，对土壤结构、养分供应和持水能力产生潜在的有害影响。
ABSTRACT: Ten soil sites in western Kansas sampled in 1948 were resampled in 1984 to compare the particle size distribution (texture) and organic matter content in the top 10 cm. Except at one site, the sand fraction increased; this increase ranged from 0.9 to 23.3 percentage points. The greatest changes occurred in the moderately coarse and coarse textured (sandy) soils. Overall changes in particle distribution were + 6.5, −7.2, and +0.7 percentage points for sand, silt, and clay, respectively, indicating that silt was removed through sorting by wind. Organic matter declined at 8 of the 10 sites, averaging about 19% overall or about 0.01 percentage points per year. Erosion or other factors are causing a slow decline in silt content and organic matter in these soils, with potentially detrimental effects on soil structure, nutrient availability, and water-holding capacity.