【摘要】 利用室内氨挥发模拟系统和同位素 1 5 N示踪技术 ,研究高效尿素对氨挥发损失和氮素去向的影响。结果表明 ,与普通尿素相比 ,高效尿素在供试的 3种土壤中能推迟氨挥发开始时间和氨挥发高峰值出现的时间 ,降低氨挥发速率高峰值 ,减少氨挥发损失 1 8.9%～ 44 .1 %。高效尿素使水稻植株中来自肥料和土壤中的氮显著增多 ,当季氮素利用率增加 6 .3～ 7.1个百分点 ,土壤残留量增加 5 .3%～ 1 2 .0 % ,减少氮素损失 1 7.0 %～ 1 9.3%。施用高效尿素的水稻产量比施用等氮量普通尿素增产 2 7.0 %～ 2 9.3%。更多还原

【Abstract】 Effects of high efficiency urea on the loss of ammonia volatilization and nitrogen fate were studied by the methods of ammonia volatilization model system and 15 N tracer technique.Compared with common urea,high efficiency urea applied to three kinds of soil could put off the initial time and the high time of ammonia volatilization and cut down the rate of ammonia volatilization It reduced the amount of ammonia volatilization by 18 9%～44 1% The nitrogen content in the rice plant from fertilizer and soil was increased apparently.Current nitrogen utilization rate of the treatment with high efficiency urea was increased by 28 3%～31 8% and the increase of residual N in soil ranged from 5 3% to 12 0% which resulted in the decrease of the loss of fertilizer N by 17 0%～19 3% Yield of rice applied with high efficiency urea was increased by 27 0%～29 3% compared with that of rice applied with common urea of equal N content.更多还原