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在模拟降雨条件下研究等氮量和相同施肥方式下不同氮肥品种的氮素流失特征。结果表明:不同氮肥品种对氮素流失量有显著影响,施用碳酸氢铵、普通尿素的小区全氮、铵态氮和硝态氮的流失量较大,而施用包膜控释尿素则可以显著降低氮素流失量。不同施肥处理的小区径流液中全氮、NH4+-N及流失泥沙中全氮的流失规律表现为碳酸氢铵>尿素>硫包膜控释尿素>树脂包膜控释尿素>对照;径流液中NO3--N的流失量表现为尿素>碳酸氢铵>硫包膜控释尿素>树脂包膜控释尿素>对照。
Under simulated rainfall conditions, nitrogen losses and nitrogen losses of different nitrogen fertilizers under the same fertilization mode were studied. The results showed that different nitrogenous fertilizers had a significant effect on the amount of nitrogen loss. The total amount of nitrogen, ammonium nitrogen and nitrate nitrogen in the communities applying ammonium bicarbonate and ordinary urea were larger, while the application of coated urea could significantly Reduce nitrogen loss. The runoff of total nitrogen, NH4 + -N and sediment in different fertilization treatments showed ammonium bicarbonate> urea> sulfur coated controlled release urea> resin coated controlled release urea> control; runoff The loss of NO3 - N in urea> ammonium bicarbonate> sulfur - coated controlled - release urea> resin coated controlled release urea> control.