Nitrate reduction rates and soil/ water chemistry from roadside ditches in the Mobile Bay (AL, USA) region (2018-05-23 to 2018-06-08) (NCEI Accession 0211099)

Ninety-six roadside ditches spanning three landuse types in the Mobile Bay (Alabama, USA) region were sampled in May-June of 2018. Isotope pairing was used to measure nitrate reduction rates (denitrification, anammox, and dissimilatory nitrate reduction to ammonium) on soil slurries. These values were used to calculate the percentage of nitrogen removed in ditch soils. Soil extractable nitrate and ammonium, organic matter content, and plant above/ belowground biomass were measured as well. There was standing water in seventeen of the ditches and it was measured for nitrite, nitrate, ammonium, and phosphate concentrations.

2018年5月至6月，对位于美国阿拉巴马州莫比尔湾地区（覆盖三种土地利用类型）的96个路边排水沟进行了采样。本研究采用同位素配对法对土壤悬浊液中的硝酸盐还原速率（反硝化作用、厌氧氨氧化以及硝酸盐异化还原为氨）进行了测定。通过这些数据计算了排水沟土壤中氮的去除百分比。同时，对土壤可提取硝酸盐和铵、有机质含量以及地上和地下植物生物量进行了测量。在17个排水沟中存在静止水体，并对其中亚硝酸盐、硝酸盐、铵和磷酸盐的浓度进行了测定。