Recent research has demonstrated that P losses through subsurface pathways may reach concentrations that stimulate eutrophication. The objective of this study was to qualitatively analyze the effects of selected soil characteristics on P mobility. Both intact and packed soil columns (0-15 cm) were collected from six fields with varying land use and cropping histories. The columns were leached with deionized water and an aqueous P solution using wetting and draining periods. PO43--P load (kg ha -1) and cumulative P losses were determined. The results confirm that the major factors influencing P sorption are soil texture, soil test P, and Al and Fe content. As well, P loading into tile drainage under conventional and no-till systems with liquid dairy manure and inorganic fertilizer additions was measured over two years. No significant differences in PO4 3--P concentrations and loading were identified.
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机译：最近的研究表明，通过地下途径的磷损失可能达到刺激富营养化的浓度。这项研究的目的是定性分析所选土壤特性对磷迁移率的影响。完整的土壤柱和填充的土壤柱（0-15厘米）均从六个土地用途和耕种历史不同的田地中收集到。使用润湿和排出时间，用去离子水和P水溶液浸提柱。确定了PO43--P负荷（kg ha -1）和累积P损失。结果证实影响土壤磷吸收的主要因素是土壤质地，土壤测试磷以及铝和铁的含量。同样，在两年内测量了在传统和免耕系统下使用液态乳肥料和无机肥料添加时瓷砖排水中的磷负荷。没有发现PO4 3--P浓度和载量有显着差异。
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