Dredging operations produce large amounts of sediments; and when open lake disposal is employed, it can pose a threat to water quality. This study scoped the potential to use dredged sediment as a farm soil amendment. We conducted greenhouse experiments to determine (1) the physico-chemical health of a farm soil amended with various dredged sediment ratios, (2) nutrient dynamics when the soil blends were subjected to simulated storm events, and (3) the effect of dredged sediment on soybean belowground biomass and yield. The soil blends consisted of 100% farm soil, 90% farm soil to 10% dredged sediment, 80% farm soil to 20% dredged sediment, or 100% dredged sediment. After 123 days, the soybean plants were harvested, and physico-chemical analyses were conducted on the soil, soybeans, and percolated stormwater. We found that dredged sediment amendment improved soil health by increasing soil organic matter, cation exchange capacity, and calcium content, and by decreasing bulk density and phosphorus (P) concentration in a farm soil with P concentration above agronomic recommended value. Crop biomass and yield averages increased with increasing dredged sediment ratios. Nutrient loss (phosphorus and nitrogen) in the percolated solutions from the soil blends showed no significant changes when compared to the percolated solutions in the 100% farm soil treatment, indicating no significant contribution to the export of nutrients in percolated water. This article is protected by copyright. All rights reserved.

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评估湖泊疏浚沉积物对土壤健康的影响：对俄亥俄州西北部的农业和环境影响

疏浚作业会产生大量沉积物；如果采用开放式湖泊处理，则可能对水质构成威胁。这项研究探讨了使用疏浚沉积物作为农田土壤改良剂的潜力。我们进行了温室实验，以确定 (1) 用各种疏浚沉积物比率修正的农田土壤的物理化学健康状况，(2) 土壤混合物经受模拟风暴事件时的营养动态，以及 (3) 疏浚沉积物的影响对大豆地下生物量和产量的影响。土壤混合物由 100% 农田土壤、90% 农田土壤与 10% 疏浚沉积物、80% 农田土壤与 20% 疏浚沉积物或 100% 疏浚沉积物组成。123 天后，收获大豆植株，并对土壤、大豆和渗透的雨水进行理化分析。我们发现，疏浚底泥改良剂通过增加土壤有机质、阳离子交换能力和钙含量，以及通过降低农田土壤中 P 浓度高于农艺推荐值的容重和磷 (P) 浓度来改善土壤健康。作物生物量和产量平均值随着疏浚沉积物比率的增加而增加。与 100% 农场土壤处理中的渗滤溶液相比，土壤混合物渗滤溶液中的养分损失（磷和氮）没有显示出显着变化，表明对渗滤水中养分的输出没有显着贡献。本文受版权保护。版权所有。并通过降低农田土壤中的容重和磷 (P) 浓度，使 P 浓度高于农艺推荐值。作物生物量和产量平均值随着疏浚沉积物比率的增加而增加。与 100% 农场土壤处理中的渗滤溶液相比，土壤混合物渗滤溶液中的养分损失（磷和氮）没有显示出显着变化，表明对渗滤水中养分的输出没有显着贡献。本文受版权保护。版权所有。并通过降低农田土壤中的容重和磷 (P) 浓度，使 P 浓度高于农艺推荐值。作物生物量和产量平均值随着疏浚沉积物比率的增加而增加。与 100% 农场土壤处理中的渗滤溶液相比，土壤混合物渗滤溶液中的养分损失（磷和氮）没有显示出显着变化，表明对渗滤水中养分的输出没有显着贡献。本文受版权保护。版权所有。与 100% 农场土壤处理中的渗滤溶液相比，土壤混合物渗滤溶液中的养分损失（磷和氮）没有显示出显着变化，表明对渗滤水中养分的输出没有显着贡献。本文受版权保护。版权所有。与 100% 农场土壤处理中的渗滤溶液相比，土壤混合物渗滤溶液中的养分损失（磷和氮）没有显示出显着变化，表明对渗滤水中养分的输出没有显着贡献。本文受版权保护。版权所有。