摘要
采用室内土柱模拟的方法,研究片麻岩新成土中不同肥料、不同施氮量对氮素垂直运移的影响。结果表明,随着施氮量增加,硝态氮和铵态氮淋溶浓度增大,氮素淋失量增多。中等施氮量下施用有机无机混合肥可以减少氮素淋失。尿素、有机无机混合肥、氮磷复合肥中硝态氮淋失总量比值为671∶583∶629。尿素硝态氮淋失率平均为29.0%,氮磷复合肥硝态氮淋失率平均为27.8%,有机无机混合肥硝态氮淋失率平均为23.7%。随着土层深度的增加,60cm处和90cm处硝态氮淋失量差异不显著,两处硝态氮淋失量比值为1∶1.03,铵态氮的淋失量增加显著,两处铵态氮淋失量比值为1∶2.4。在片麻岩新成土壤地区,土壤培肥应本着少量多次原则。
By simulating soil column in laboratory, the effects of the nitrate vertical transport characteristics in the gneiss under the different of N fertilizer were studied. The results showed that, the amount of nitrogen leached was increased with the increasing amount of nitrogen fertilizer, Organic-inorganic mixed fertilizer could reduce nitrate-nitrogen leached with the medium nitrogen fertilizer application. The ratio of leaching loss amounts of nitrate-nitrogen was 671 ： 583 ： 629 among urea, organic-inorganic mixed fertilizer and N-P compound fertilizer. To urea, the rate of nitrate-nitrogen leaching loss averaged 29.0%. N-P compound fertilizer averaged 27.8%. Organic-inorganic mixed fertilizer averaged 23.7%. With the increase of soil depth, there was no Significant difference between 60 cm and 90 cm where the ratio of nitrate-nitrogen leaching loss was 1 ： 1.03. The ratio of ammoniUm-nitrogen leaching loss was 1： 2.4 which increased significantly between two depths. Authors gave advice to fertilize a few for each time but for many times in the gneiss entisols.
出处
《水土保持学报》
CSCD
北大核心
2013年第1期17-21,70,共6页
Journal of Soil and Water Conservation
基金
河北省自然科学基金项目(C2009000565)
关键词
片麻岩
硝态氮
淋溶迁移
gneiss
nitrate
transport and leaching
