摘要
通过室内土壤灌施间歇入渗试验,研究了灌施条件下波涌灌溉土壤间歇入渗硝态氮的运移与分布特性,并与灌施条件下土壤连续入渗进行了对比。肥液入渗硝态氮主要保存在浅层土壤中,间歇入渗较连续入渗硝态氮锋面运移速度慢,湿润范围内间歇入渗浅层土壤中入渗硝态氮量占总入渗量的比例较连续入渗的高,间歇入渗有利于将硝态氮保持在浅层土壤之中。研究成果为进一步研究施肥条件下波涌灌溉土壤间歇入渗盐分、养分等溶质运移规律奠定了基础。
The nitrate nitrogen transport and distribution characteristics of intermittent infiltration under surge fertigation are researched based on indoor experimental data, and contrast with continuous infiltration. Infiltrated nitrate nitrogen stores in shallow soil layer more easily. Soil nitrate nitrogen front moves slower under intermittent infiltration than under continuous infiltration. The proportion of nitrate nitrogen quantity in wetted zone under intermittent infiltration is larger than under continuous infiltration in shallow soil and nitrate nitrogen stored in shallow soil easily. These research results have laid a foundation for further study of soil solute transfer theory and technology of surge irrigation fertilization.
出处
《灌溉排水学报》
CSCD
北大核心
2004年第5期41-44,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金资助项目(50179030)
关键词
硝态氮
土壤
入渗量
波涌灌溉
施肥条件
运移
盐分
移速
浅层
锋面
fertigation
surge irrigation
intermittent infiltration
continuous infiltration
nitrate nitrogen
