%0 Journal Article
%T A STUDY OF NITRIFICATION OF NH 4 + AND MOVEMENT OF NO3-BY TIME DOMAIN REFLECTIOMETRY (TDR) METHOD<br>用TDR确定沙壤土非饱和淹灌条件下NH4+的硝化反应及NO3-的入渗迁移
%A Sun Yulong
%A Hao Zhenchun
%A Chen Qihui
%A Liu Ling
%A Zhang Heping
%A <br>孙玉龙
%A 郝振纯
%A 陈启慧
%A 刘凌
%A 张和平
%J 环境科学学报
%D 1997
%I 
%X The spatial distribution of 8 trace elements in agricultural soils with sewage irrigation at the eastern suburb of Beijing were studied by variogram analysis. The spatial variations of these elements are much more significant in comparison with those from clean water irrigated soils. This is because of the accumulation of trace elements near the irrigation inlets. The contents of all elements show similar spatial structures.
%K Sewage irrigation
%K soil
%K trace element
%K variogram
%K spatial structure<br>污灌
%K 土壤
%K 微量元素
%K 空间结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=A606C7F7D83B5842E51B5DC84C099ED4&yid=5370399DC954B911&vid=BCA2697F357F2001&iid=E158A972A605785F&sid=84A93BA251D28205&eid=B941678158018439&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=51&reference_num=8