涪陵地区农田径流水体中三氮含量及分布特征

Three-N Concentrations of Farmland Runoff Waterbody in Fuling Prefecture and Their Distribution Features

本文在涪陵地区大面积和定点采集了农田径流水体样品,测定了径流水体中的三氮含量。探讨了径流水体三氮随产流时间的变化,分析了干旱时间,水体流动等因素对三氮含量的影响。结果表明,干旱时间,径流水体流动对三氮含量有一定的影响。经统计分析,涪陵地区农田径流水体中的NH_3—N,NO_3^-—N,NO_2^-—N和T—N含量分别为0.840,0.970,0.107和2.07mg/l。

Three-N concentration of water samples of runoff water body collected from fixed points over a large area in Fuling Prefecture, Sichuan Province were measured. The change of 3-N in water body with runoff time is discussed, The influences of dry period and water flow in the water body on the concentrations are discussed. The result shows the dry period and water flow have some effects on the concentrations. According to the statistically analytical, the concentrations of NH_3-N, NO_3^--N, NO_2^--N and T-N in Farmland runoff water body in this area are 0.840, 0.970, 0.107 and 2.07 mg/l, respectively.