Chinese Acad Sci;
Xinjiang Inst Ecol & Geog;
Urumqi 830011;
Peoples R China;
Chinese Acad Sci;
Grad Univ;
Beijing 100049;
Peoples R China;
Xinjiang Acad Forestry;
Urumqi 830000;
Peoples R China;
Populus; euphratica; population; static; life; table; survivorship; curve; survival; analysis; development; index; time; sequence;