石家庄农业科学研究院选育的石玉7号玉米是目前集节水、高产、高淀粉、抗病等优良性状于一体的优良新品种。石玉7号在全国北方夏玉米区域中两年平均亩产分别为480.5和516.2公斤,比对照品种豫玉5号增产16.5％和10.8％,两年18个点次,17个点增产,居参试品种第一位,最高亩产达797.7公斤。在 Shijiazhuang Academy of Agricultural Sciences breeding corn 7 is the current set of water-saving, high yield, high starch, disease resistance and other fine characters in one of the fine new varieties. Shiyu 7 in the northern summer maize region in the two-year average yields were 480.5 and 516.2 kg, compared with the control varieties Yuyu 5 16.5% and 10.8% increase yield, 18 points for two years, 17 points yield, living The first test varieties, the highest yield of 797.7 kg per mu. in