龙粳4号是黑龙江省农科院水稻研究所于1982年以龙粳1号为母本,滨旭为父本杂交的 F_1代经花药离体培育的水稻品种。1993年经省农作物品种审定委员会确定推广。产量表现 1987～1989年参加全省18点次区试,平均亩产497.2公斤,比对照合江23号增产8.0%。1989～1990年参加两年生产试验,平均亩产484.3公斤,比对照增产 Longjing 4 is a rice variety cultivated in vitro by F_1 generation of F1 progeny with Longjing 1 as female parent and Binxu as male parent in 1982 by Rice Research Institute of Heilongjiang Academy of Agricultural Sciences. In 1993 by the Provincial Crop Variety Commission to determine the promotion. Production performance In 1987 ~ 1989 18 provinces participated in the district test, the average yield of 497.2 kg per mu, compared with the control of Jiang 23, an increase of 8.0%. From 1989 to 1990 to participate in the two-year production test, the average yield of 484.3 kg per mu, more yield than the control