摘要
用土柱研究旱地土壤60cm土体夏季的氮肥淋溶损失，结果表明，在土壤施尿素后35d内淋水350mm，在不产生泾流的条件下，淋失率平均为25．5％。还探讨了氮肥淋溶过程中的氮形态变化，以及施氮量和土层深度对氮肥淋浴损失的影响。
The nitrogen leaching loss from the soils in dry land at different depths (20, 40 and 60 cm) of columns was studied. The results indicated that the nitrogen leaching loss was 25.5% in the 35 days of simulated precipitation after the application of urea and under the condition of no surface flow. The leaching process and nitrogen forms, and the effects of application rate and the depth of soils on nitrogen loss by leaching were also discussed in this paper.
出处
《土壤与环境》
CSCD
1999年第4期314-315,共2页
Soil and Environmental Sciences
基金
农业部"九五"重点科技项目!95-03-01-01
关键词
旱地土壤
氮肥
淋溶损失
dry land
nitrogen fertilizer, leaching loss
