WANG Feng-bao1 FU Jin-feng2 DONG Li-feng2 ZHANG yong-xin3(1.College of Horticulture,Northwest A & F University,Yangling,Shaanxi 712100;;2.Department of Agronomy,Hebei Normal University of Science & Technology,Changli,Hebei 066600;3.The Flowers and plants Administration Center of Hebei,Shijiazhuang,Hebei 050081)