The;
Key;
Laboratory;
of;
Environmental;
Geochemistry,;
Institute;
of;
Geochemistry,;
Chinese;
Academy;
of;
Sciences,;
Guiyang;
550002,;
China;
The;
Key;
Laboratory;
of;
Environmental;
Geochemistry,;
Institute;
of;
Geochemistry,;
Chinese;
Academy;
of;
Sciences,;
Guiyang;
550002,;
China;
extraneous; nitrogen; input,; interior; nitrogen; release,; Hongfeng; Lake.;