Ji-Shan Chen
Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, Harbin, China; Suihua Experimental Station, National Agriculture Research System, China
Rui-Fen Zhu
Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, Harbin, China
Yue-Xue Zhang
Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, Harbin, China; Suihua Experimental Station, National Agriculture Research System, China
Gao Cao
Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, Harbin, China
Gui-Li Di
Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, Harbin, China