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首页> 外文期刊>Soil Science Society of America Journal >Taxonomic and Geographic Distribution of Soil Organic Carbon Pools in Ohio
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Taxonomic and Geographic Distribution of Soil Organic Carbon Pools in Ohio

机译:俄亥俄州土壤有机碳库的分类学和地理分布

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Spatial distribution information about soil organic C (SOC) pools at a proper scale is critical for developing feasible C sequestration programs. This study characterizes the spatial variation in SOC pools related to soil taxon, Major Land Resource Area (MLRA), and land use. Grouping data by the land uses associated with soil orders within each MLRA leads to a statewide average SOC pool of 10.2 ± 2.8 kg m–2 in the upper 1-m depth, ranging from 7.1 kg m–2 in Ultisols to 117 in Histosols (8.8, 11.3, 12.7, and 16.9 kg m–2 in Alfisols, Inceptisols, Entisols, and Mollisols, respectively), and geographically varying from 7.7 kg m–2 in MLRA 124 to 12.0 in both MLRA 99 and 111. These variations can be also partially attributed to the properties for suborder differentiation. Moreover, land use effects are confounded by preferential selection of land for cropland use and site topographic features, resulting in a higher SOC pool in cropland (10.9 kg m–2) than in both forestland (9.5 kg m–2) and pastureland (8.4 kg m–2). The grand total SOC storage in Ohio ranges from 853 to 881 Tg (1 Tg = 1012 g). The SOC pool is primarily related to landscape slope and soil drainage, and must be considered in interpretations for C sequestration potential among land uses for each soil taxon at the MLRA scale.
机译:有关土壤有机碳(SOC) 池的适当分布的空间分布信息对于开发可行的 C固存程序至关重要。这项研究的特点是SOC池中与土壤分类群,主要土地资源(MLRA)和土地利用有关的空间 变化。根据与每个MLRA中的土壤顺序相关的 与土地使用相关的土地分组数据,可得出全州平均 SOC池为10.2±2.8 kg m –2 较高的1-m 深度,范围从Ultisols的7.1 kg m –2 到Histosols 的117 kg m –2 (8.8、11.3、12.7和16.9) kg m –2 分别存在于Alfisol,Inceptisols, Entisols和Mollisols中),并且地理位置差异 从7.7 kg m –2 在MLRA 124中降为12.0,在MLRA 99和 111中降为12.0。这些变化也可以部分归因于 属性以进行子顺序区分。此外,土地使用 的效果与优先选择土地用于 耕地的使用和场地地形特征相混淆,导致农田中更高的 SOC池(比林地 (9.5 kg m –2 )和牧场(8.4 kg m –2 < / sup>)。俄亥俄州的盛大SOC总存储量为853至881 Tg(1 Tg = 10 12 g)。 SOC池主要与景观坡度 和土壤排水有关,在解释 时必须考虑每种土壤的土地利用中碳固存潜力 MLRA级别的分类单元。

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