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	九龙江流域地表水中硝酸盐来源辨析; Identifying Sources of Nitrate in Surface Water of Jiulong River Watershed
	陈惟财 ; 陈伟琪 ; 张珞平 ; 洪华生 ; CHEN Wei cai ; CHEN Wei qi ; ZHANG Luo ping ; HONG Hua sheng
	2008-06
关键词	农业非点源污染 硝酸盐 来源 判别 氮同位素 示踪
英文摘要	[摘要]：从九龙江流域遴选出2 个典型小流域仙都和五川小流域作为研究区, 于2005 年春季运用15N同位素示踪法对其地表 水中硝酸盐来源进行研究. 结果表明, 仙都小流域地表水中溶解态总氮、硝氮和氨氮的浓度范围( 以N 计, 下同) 分别为147~ 531 mgL、083~ 405 mgL和021~ 036 mgL, 硝酸盐的15N值( 以样品相对于标准大气N2 的15N与14N比值的千分偏差表示) 范围在254 ~ 792 之间; 五川小流域地表水中溶解态总氮、硝氮和氨氮的浓度范围分别为114~ 556 mgL、096~ 146mgL和012~ 128 mgL, 硝酸盐的15N值范围在- 019 ~ 589 之间. 对照不同来源的硝酸盐15N特征值, 结合研究区的农 作物种植和施肥状况, 得出如下结论: 仙都小流域地表水中硝酸盐主要来自无机化肥与土壤有机氮, 有机肥有一定的贡献; 五 川小流域地表水中硝酸盐的来源以无机化肥与土壤有机氮为主, 有机肥的贡献很小; 2 个小流域地表水中硝酸盐的来源随时 空变化而有差异, 与当地农作物种类及农田时令密切相关.[Abstract]:Two representative catchments, Wuchuang catchment and Xiandu catchment, were selected from Jiulong River Watershed as study areas to trace sources of nitrate in surface water by using 15N isotope technique. In the spring of 2005, the surface water samples were twice collected from the catchments and determined for dissolved total nitrogen ( DTN) , nitrate nitrogen ( NO-3N) , ammonia nitrogen ( NH+4N) and 15N value of nitrate. The results showed that in the samples from Xiandu catchment, the concentration ranges of DTN, NO- 3N and NH+ 4N were 147-531 mgL, 083-405 mgL and 021-036 mgL respectively, and the 15N values of nitrate ranged from 254 to 792 ; in the samples from Wuchuang catchment, the concentration ranges of DTN, NO- 3N and NH+ 4N were 114-556 mgL, 096-146 mgL and 012-128 mgL respectively, and the 15N values of nitrate were between - 019 and 589 . In contrast with the typical ranges of 15N isotopic signature of nitrate from different sources and in consideration of the information of local crop planting circumstances and application of fertilizers, the data indicated that the first, the nitrate in the surface water of Xindu catchment mainly came from inorganic fertilizers and soil organic nitrogen, and some originated from organic fertilizers; the second, the nitrate in the surface water of Wuchuang catchment mostly flowed from inorganic fertilizers and soil organic nitrogen, and few derived from organic fertilizers; the third, the sources of nitrate varied with the sampling location and time and were dependent on the kinds of local crops and their planting seasons.
语种	中文
出版者	《环境科学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/1153]
专题	海发院－已发表论文
推荐引用方式 GB/T 7714	陈惟财,陈伟琪,张珞平,等. 九龙江流域地表水中硝酸盐来源辨析, Identifying Sources of Nitrate in Surface Water of Jiulong River Watershed[J],2008.
APA	陈惟财.,陈伟琪.,张珞平.,洪华生.,CHEN Wei cai.,...&HONG Hua sheng.(2008).九龙江流域地表水中硝酸盐来源辨析..
MLA	陈惟财,et al."九龙江流域地表水中硝酸盐来源辨析".(2008).

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