摘要
通过对贵阳市城郊区浅层地下水的调查及采样分析,探讨土地利用方式对地下水硝态氮含量的影响。研究结果表明:不同土地利用方式下浅层地下水中NO3--N含量出现较大差异,与林地相比,城市生活用地、耕地和工业用地的地下水硝态氮平均含量分别增加2.47倍、3.88倍和2.25倍。丰水期地下水硝酸盐含量普遍高于枯水期。以NO3--N为评价指标,耕地、城市生活用地、工业用地地下水质在枯水期均为Ⅳ类,而丰水期地下水质均为Ⅴ类;林地地下水的NO3--N浓度在枯水期和丰水期均小于10 mg/L,水质达到Ⅲ类。
This paper explored the effects of different land use patterns on the content of NO3^- - N and the quality of shallow groundwater through sampling investigation in Guiyang city in Guizhou province. The results showed that the average content of NO3^- - N in shallow groundwater of residence land, cultivated land and industrial land increased 2.47, 3.88 and 2.25 times respectively as compared with that of forest land. The content of NO3^- - N in shallow groundwater in abundant water period was generally higher than that in low water period. Based on the content of NO3^- - N in shallow groundwater and the classification of water quality standards, the groundwater quality of cultivated land, residence land and industrial land all belonged to category IV in low water period, while they all belonged to category V in abundant period; the content of NO3^- - N in shallow groundwater of forest land in both low water and abundant water period was less than 10 mg/L, its groundwater quality reached to category Ⅲ.
出处
《江西农业学报》
CAS
2009年第2期119-122,共4页
Acta Agriculturae Jiangxi
关键词
浅层地下水
硝态氮
土地利用方式
水质
贵阳市
Shallow groundwater
Land use pattern
NO3^- -N
Water quality Guiyang city
