干旱区生态环境知识资源中心(Arid): 干旱区不同类型土壤中硝酸盐的分布特征及来源分析

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	干旱区不同类型土壤中硝酸盐的分布特征及来源分析
其他题名	Distribution characteristics and source analysis of nitrate in different types of the soil in arid areas
	赵梦竹; 马金珠
来源期刊	兰州大学学报. 自然科学版
ISSN	0455-2059
出版年	2014
卷号	50 期号:3 页码:424-430,436
中文摘要	选取中国西北部石羊河流域的武威地区典型土壤为研究对象,通过Cl~-, NO_3~-质量浓度分布组合特征,揭示了干旱区平沙地、板结地和荒农地3种类型土壤剖面硝酸盐的来源与空间分布特征,探究了Cl~-与NO_3~-质量浓度的相关关系。结果表明:土壤中Cl~-与NO_3~-都主要分布于表土层,在深土层二者质量浓度都有不同程度的降低;随着土壤深度的增加,均呈活塞式分布,这种分布特征对于平沙地土壤表现得尤为明显。 Cl~-与NO_3~-在土壤中的分布具有极大的相关性,二者质量浓度的变化趋势保持高度一致,相对较高的NO_3~-/Cl~-原子比值反映了干旱区土壤中硝酸盐的富集度较高。干旱区土壤中的NO_3~-主要来自大气沉降(尤其是降水带入),干旱的气候和贫瘠的土地使得农耕地土壤中的NO_3~-主要来自农田肥料和污水灌溉,其次是生活污物、人畜排泄物以及硝化作用。
英文摘要	By adopting the method of combining artificial sampling and experimental analysis, we select a typical soil from the Wuwei region of the Shiyang River Basin in Northwest China as the research object, determined the concentration of Cl~- and NO_3~- , revealed the spatial distribution characteristics of nitrates in three types of the soil profile, i.e. sand, hardened earth and farm land in arid areas, explored the correlation between the concentration of Cl~- and NO_3~- , and analyzed the main source of nitrate at the same time. The results showed that Cl~- and NO_3~- were mainly distributed in the top soil in this three soil profiles and, in the deep soil layer, both the content of Cl~- and NO_3~- were reduced at the varying degrees. With the increase of soil depth, the contents were distributed in piston type, and this distribution characteristic was especially obvious in the sandy soil. The distribution of Cl~- and NO_3~- in the soil had a great relevance, the changing tendency of these concentrations were highly consistent, and the NO_3~-/Cl~- atomic ratio was relatively high, indicating that the abundance of nitrate was higher in the soil in arid areas. In the arid soil, NO_3~- were mainly from the atmospheric precipitation (especially the entrance of precipitation);in the farmland soil, NO_3~- were mainly from the farmland fertilizers and the sewage irrigation, and secondly from life sewage, human or animal waste and the nitrification too.
中文关键词	硝态氮 ; 土壤 ; 土地利用 ; 分布特征 ; 干旱区
英文关键词	nitrate nitrogen soil land use distribution characteristics arid areas
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5188533
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231421
作者单位	兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵梦竹,马金珠. 干旱区不同类型土壤中硝酸盐的分布特征及来源分析[J]. 兰州大学,2014,50(3):424-430,436.
APA	赵梦竹,&马金珠.(2014).干旱区不同类型土壤中硝酸盐的分布特征及来源分析.兰州大学学报. 自然科学版,50(3),424-430,436.
MLA	赵梦竹,et al."干旱区不同类型土壤中硝酸盐的分布特征及来源分析".兰州大学学报. 自然科学版 50.3(2014):424-430,436.