摘要
采用室内土柱模拟的方法,研究河北省太行山片麻岩新成土中不同肥料、不同施氮量对硝态氮垂直运移的影响。结果表明,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1∶0.87∶0.94。中等施氮量下,有机无机复混肥可以降低氮素淋失。尿素硝态氮淋失率平均为29%,氮磷复合肥平均为27.8%,有机无机混合肥平均为23.7%。60cm和90cm处硝态氮淋失量比值为1∶1.03,差异不显著。淋溶结束后,有机无机混合肥在不同土层各处理中硝态氮含量最高,尿素硝态氮含量最低。
By simulating soil column in laboratory, the effects of the nitrate vertical transport characteristics in the gneiss of Taihang mountainous region of Hebei Province under different N fertilizer were studied. The results showed that the ratio of leaching loss amounts of nitrate-nitrogen was 1 ： 0.87 ： 0.94 among urea, organic-inorganic mixed fertilizer and N-P compound fertilizer. The amount of nitrate leaching increased with the increasing amount of nitrogen fertilizer, but there was no significant difference among the three fertiliz- ers. Organic-inorganic mixed fertilizer could reduce nitrate leaching with the medium nitrogen fertilizer appli- cation. For urea, the rate of nitrate leaching loss averaged 29%, 27.8% for N-P compound fertilizer, 23.7% for organic-inorganic mixed fertilizer. With the increase of soil depth, there was no significant difference be- tween 60 cm and 90 cm in which the ratio of nitrate-nitrogen leaching loss was 1 ： 1.03. At the end of the leaching, the nitrate content of organic-inorganic mixed fertilizer was the highest and the urea nitrate content was the lowest in different treatments.
出处
《水土保持研究》
CSCD
北大核心
2014年第1期122-126,共5页
Research 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
