针对直播稻用种量越来越大的情况,于2009年在沅江草尾镇进行了早晚稻直播不同类型品种用种量研究,初步摸索出了洞庭湖区双季稻直播适宜的用种量,其中早稻直播中熟常规品种适宜用种量为120～150 kg/hm2,中熟早杂品种适宜用种量为37.5～45 kg/hm2;晚稻直播常规中熟早稻品种适宜用种量为105～127.5 kg/hm2,晚稻直播中熟早杂品种适宜用种量为45～52.5 kg/hm2。 In order to increase the amount of direct-seeding rice, in 2009, we conducted a study on the seeding rate of different types and varieties of direct seeding rice in Caojiang Town of Yuanjiang, and found out the appropriate seeding rate of double-seeding rice direct seeding in Dongting Lake area, Suitable varieties of conventional varieties were 120 ~ 150 kg / hm2 for mid-season direct-sowing, 37.5-45 kg / hm2 for medium-mature early-maturing varieties, and 105-127.5 kg / hm2, suitable late-season varieties for direct seeding of late rice were 45 ~ 52.5 kg / hm2.