摘要
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。
With a simulated rainfall equipment,the pattern of soil nitrogen loss under a same rainfall intensities was studied by plot test on sloping surfaces.Results showed that under the same conditions,the different kind of fertilizer had significant difference.Compared with ammonium bicarbonate and urea,the controlled-release urea could reduce the loss of nitrogen.In the same situation,the amount of total nitrogen,ammonium nitrogen in runoff and total nitrogen in sediment was given as follows: Ammonium bicarbonate urea sulphur coated control-released urea resin coated control-released urea.The amount nitric nitrogen loss in runoff was given as follows: Urea ammonium bicarbonate sulphur coated control-released urea resin coated control-released urea.
出处
《水土保持学报》
CSCD
北大核心
2012年第2期45-48,共4页
Journal of Soil and Water Conservation
基金
国家“十二五”科技支撑计划项目(2011BAD11B01,2011BAD11B02)
国家“948”重点项目(2011-G30)
山东省中青年科学家奖励基金项目(BS2009NY025)
山东省自然科学基金项目(ZR2009DM043)
关键词
模拟降雨
不同氮肥
坡面
侵蚀土壤
氮素流失
simulated rainfall
different nitrogen fertilizer
slope
erosion soil
nitrogen loss