[Cui, Y. H.; Li, Q. A.; Liu, J. Y.; Gao, Z. W.] Baicheng Normal Univ, Tourism & Geog Sci Inst, Baicheng 137000, Peoples R China.
[Liu, J.] Agr Technol Extens Stn Dongliao Cty, Dongliao 136600, Peoples R China.
[Zhu, Q. A.] Northeast Normal Univ, Inst Grassland Sci, Coll Life Sci, Changchun 130024, Peoples R China.
[Mu, Y. G.] Jilin Normal Univ, Sch Life Sci, Siping 136000, Jilin, Peoples R China.
[Rasheed, A.] Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China.