中国农业科技导报2011，Vol.13Issue(1)：68-74,7.DOI:10.3969/j.issn.1008-0864.2011.01.11
巢湖流域地下水硝态氮的分布及其影响因素研究
Studies on Groundwater Nitrate Nitrogen Distribution and its Affecting Factors in Chao Lake Watershed
摘要
Abstract
To investigate the spatial distribution of groundwater nitrate nitrogen (NO3--N) in the Chao Lake watershed, 253 water samples were collected from wells in the watershed from November to December, 2009 and their NO3--N concentrations were analyzed. The results showed that the samples' NO3--N concentrations were averaged 7.13 mg/L, and 15.81％ of them exceeded 10 mg/L, the WHO limit for NO3--N of drinking water, and 7.11％ of them exceeded 20 mg/L, the criterion for serious NO3--N pollution. The NO3--N concentrations were different in different land types, with the pattern of villages ＞ vegetable fields ＞ fruit gardens ＞ dry lands ＞ towns ＞ rice-rope ( or wheat) fields ＞ single-season rice fields ＞ livestock farms. The NO3--N concentration of groundwater in Green Rice-Producing Area was lower than that in Non-Green Rice-Producing Area in Chao Lake watershed. The NO3--N concentration of groundwater in farmlands was positively related to the application rate of nitrogen chemical fertilizer, the population density and the proportion of cultivated area. The NO3--N concentrations were declined with the lowering of the groundwater table, but there was no significant correlation between them. When the application of chemical fertilizer nitrogen exceeds 100 kg/hm2, or the groundwater table is less than 9 m, the NO3--N concentration of groundwater has the potential risk of exceeding the WHO limit.关键词
巢湖流域/地下水/硝态氮分类
农业科技引用本文复制引用
顾颖,孙东宝,王庆锁..巢湖流域地下水硝态氮的分布及其影响因素研究[J].中国农业科技导报,2011,13(1):68-74,7.基金项目
"十一五"国家科技支撑计划项目(2007BAD87B01) （2007BAD87B01）
国家科技重大专项(2008ZX07425)资助. （2008ZX07425）
