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首页> 外文期刊>Landbauforschung >Phosphorus and trace metal distribution under confined cattle feeding operations in Southern Alberta
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Phosphorus and trace metal distribution under confined cattle feeding operations in Southern Alberta

机译：南部艾伯塔省圈养牛的磷和微量金属分布

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Intensive beef cattle production in confined cattle feeding operations (CCFO) are characterized by accumulating layers of solid manure that cover the underlying mineral soil all year round. The extent to which nutrients and trace elements accumulate in the underlying soils is unknown but these present a potential risk to water sources as a result of surface run-off and leaching. Therefore, concentrations and depth distributions of phosphorus (P) and trace elements as typical marker compounds of manure affected environments were investigated in soil profiles of a research CCFO and compared to an unaffected grassland soil in the semi arid area of southern Alberta, Canada. Mean total P concentrations (TP) in the soil profiles were 384 mg kg~(-1) for the CCFO and 409 mg kg~(-1) for the grassland with only few significant differences between the soil profiles within each location and between the two locations. These differences could be explained by slight changes in the parent material. A sequential Pfractionation revealed that most P occurred in the HCl fraction (> 51 % of TP), demonstrating strong binding of P to calcium and thus low mobility in these calcareous Dark Brown Chernozemic clay loam soils. There were no uniform enrichments and changes in the P fractions determined after nine years of CCFO operation. Similarly, there was no accumulation of the trace elements Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in the soil profiles under the CCFO. In conclusion, under current feeding and management practices, there is a low risk of groundwater pollution through leaching from CCFOs under these semi-arid climate conditions.
机译：密闭牛饲养操作（CCFO）中集约化养牛的特点是常年积累固体肥料，这些肥料覆盖了下面的矿质土壤。营养物质和微量元素在下面的土壤中积累的程度尚不清楚，但由于地表径流和淋溶，这些物质和水源对水源构成了潜在风险。因此，在CCFO研究的土壤剖面中调查了磷（P）和微量元素（受粪肥影响的典型标志物）的浓度和深度分布，并将其与加拿大艾伯塔省南部半干旱地区未受影响的草地土壤进行了比较。 CCFO的土壤剖面中的平均总P浓度（TP）为384 mg kg〜（-1），草地为409 mg kg〜（-1），每个位置之间的土壤剖面之间的差异很小。两个位置。这些差异可以通过母体材料的细微变化来解释。顺序分馏显示，大多数P发生在HCl馏分中（> TP的51％），这表明P与钙具有很强的结合力，因此在这些钙质黑褐色黑钙土粘土壤土中迁移率较低。 CCFO运行九年后，没有确定统一的富集和P馏分的变化。同样，在CCFO条件下，土壤剖面中没有痕量元素Cd，Cr，Cu，Fe，Mn，Ni，Pb和Zn的积累。总之，在当前的饲养和管理实践中，在这些半干旱气候条件下，由于CCFO的浸出，地下水污染的风险较低。

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