Nitrate Nitrogen Concentration Characteristics in Underground Water of Typical Planting Areas in Liao River Basin
NIU Shiwei
GONG Liang
CAI Guangxing
HE Zhigang
CHEN Yue
LIU Ziqi
SUI Shijiang
Abstract：The contents of nitrate nitrogen( NO3--N) in underground water from typical planting areas in Liao river basin were analyzed,so as to provide theoretical basis for rational fertilization and effectively provent the NO3--N content from exceeding standard. The results showed that difference of the contents of NO3--N in groundwater from different typical planting areas was significent. The highest content of NO3--N in underground water was 37. 4 mg/L from flower-growing region,then 22. 3 mg/L from maize-growing region,21. 9 mg/L from vegetable-growing region,and the lowest content of NO3--N in underground water was 19. 2 mg/L from rice-growing region. Except rice-growing region,the contents of NO3--N in under-groundwater of the samples in all planting areas were exceeding standard limit; potential health risk still existed in rice-growing region. Accordingly 12. 5%—87. 5%,9. 4%—75. 5%,17. 9%—58. 9% and 21. 4%—96. 0% of the samples were exceeding standard limit in maize growing region, rice-growing region,vegetable-growing region and flower-growing region. The contents of NO3--N in under-groundwater before the rainy season was higher than that of NO3--N in under-groundwater after the rainy season at the same depth of the well.
Keywords：Liao river basinplanting areaunderground waternitrate nitrogen
Publication Date：2015-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 50-54 )