^pof;
Urban;
and;
Environmental;
Science,Northeast;
Normal;
University,Changchun;
130024,China;
^pof;
Resources;
and;
Environment,Baotou;
Teachers';
College,Baotou;
014030,China;
^pof;
Ecology;
and;
Environment,Inner;
Mongolia;
Agricultural;
University,Huhhot;
010018,China;
^pand;
Arid;
Regions;
Environmental;
and;
Engineering;
Research;
Institute,Chinese;
Academy;
of;
Sciences,Lanzhou;
730000,China;
rare; earth; elements; significant; environment; protection; analysis; total; nitrogen; results; control; toxic; effect; tailings; dam; pollution; of; differences; application; potassium; different; promote; study; small; ANOVA; high; area;