[1] [1] ZHAO Jian-min, CHEN Hai-bin, LI Jing-xia. Journal of Northwest Forestry University, 2003, (1): 29.

[2] [2] LIU Zhi-bin. Opencast Mining Technology, 2003, (3): 1.

[3] [3] BAI Zhong-ke. Acta Ecologica Sinica, 1999, (6): 870.

[4] [4] LIU Hai-yu, FENG Jie. Shandong Environment, 1998, (3): 12.

[5] [5] LIU Guan-ning. Silicon Valley, 2011, (4): 165.

[6] [6] XUE Zong-cai, GAO Hui-yuan, PENG Tao. Plant Physiology Journal, 2011, (4): 313.

[7] [7] GULI·Jiapaer, CHEN Xi, ZHAO Jin. Scientia Sinica Terrae, 2006: 77.

[8] [8] HIANG. Northeast Normal University, 2011.

[9] [9] LI Zhang-cheng, ZHOU Qing-bo, L Xin. Acta Agronomica Sinica, 2008, (5): 831.

[10] [10] WANG Wei, WANG Wen-jie, LI Jun-sheng. Research of Environmental Sciences, 2010, (12): 1447.

[11] [11] LIU Shao-jun, ZHANG Shao-jun, HE Zheng-wei. Guangdong Agricultural Sciences, 2010, (10): 191.

[12] [12] LIU Yu-fan, CHEN Xue, LI Gui-cai. Acta Ecologica Sinica, 2011, (2): 547.

[13] [13] LI Xiu-fen, ZHAO Da-jun, ZHANG Jin-xi. Heilongjiang Meteorology, 2001, (2): 20.

[14] [14] ZHOU Ji-bing, ZHANG Dong-liang. Xinjiang Geology, 2010, 28(3).

[15] [15] ZHOU Li, LIU Li. Tianjin Agricultural Sciences, 2011, (5): 5.