水稻秧田施用尿素比较普遍。由于尿素的电离能力较差,在转化为碳铵之前被土壤胶体吸附的较少。在淹水的情况下,不被土壤吸附的尿素分子随渗漏水下移,损失较大。为了探索在淹水条件下合理选择氮肥品种,减少氮素损失的方法,我们进行了水稻秧田 Rice seedling application of urea is more common. Due to the poor ionization ability of urea, soil colloids are less adsorbed before being converted to ammonium bicarbonate. In the case of flooding, the urea molecules that are not adsorbed by the soil lose their ability to migrate with the seepage water. In order to explore the reasonable choice of nitrogenous fertilizer varieties under flooded conditions and to reduce the nitrogen loss, we conducted rice seedling