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作 者:牛世伟[1] 宫亮[1] 蔡广兴[1] 何志刚[1] 陈玥[1] 刘子琪[1] 隋世江[1]
机构地区:[1]辽宁省农业科学院植物营养与环境资源研究所,辽宁沈阳110161
出 处:《河南农业科学》2015年第8期50-54,共5页Journal of Henan Agricultural Sciences
基 金:农业部农业生态环境保护项目(2110402-201258)
摘 要:以辽河流域典型种植区为研究区域,对其地下水硝态氮含量进行分析,为合理施肥及有效防控种植区地下水硝态氮含量超标提供理论依据。结果表明,辽河流域不同典型种植区地下水硝态氮含量差异明显,具体表现为花卉种植区(37.4 mg/L)〉玉米种植区(22.3 mg/L)〉蔬菜种植区(21.9 mg/L)>水稻种植区(19.2 mg/L),各典型种植区地下水硝态氮含量除水稻种植区外都超标,但水稻种植区地下水硝态氮含量变异系数较大,有超标的风险;地下水硝态氮含量超标率差异也较明显,其中玉米种植区超标率为12.5%~87.5%,水稻种植区为9.4%~75.5%,蔬菜种植区为17.9%~58.9%,花卉种植区为21.4%~96.0%。另外,对于同一井深,不同种植区地下水硝态氮含量总体均表现为雨季前>雨季后。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.
分 类 号:X523[环境科学与工程—环境工程]
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