55个晚稻品种在浏阳不同生态区域的适应性

Adaptability of 55 Late Rice Cultivars to Different Ecological Areas of Liuyang

以湖南地区大面积推广的55个晚稻品种为试验材料,在浏阳市沙市镇(丘陵区)和大围山镇(山区)进行晚稻品种生态适应性试验。结果表明:55个品种的生育期均在122 d以内,同一晚稻品种在沙市镇(丘陵区)比在大围山镇(山区)种植的生育期短1~4 d;所有品种均未发生稻瘟病与白叶枯病,沙市镇(丘陵区)个别品种发生了较轻的南方黑条矮缩病,大围山镇(山区)有金优88、泰丰优736、润优华占、中优218、隆优4945这5个品种发生了较严重的南方黑条矮缩病,五优821发生了较严重的稻曲病;除沙市镇种植的锦两优华占有轻微倒伏现象外,其他均未发生倒伏;裕优852、卓优华占、仁5优1号、恒丰优1179、五优103这5个品种整体表现较好,产量高,均在600 kg/667m~2以上,病害发生程度小,发生率低,每穗粒数、千粒重、结实率、有效穗等产量性状在沙市、大围山两个试验点差异不大,建议在生产中大面积推广使用。泰丰优736、荣优18、五优821、润优华占、五优61、中优218、德两优华占整体表现较差,不宜在浏阳地区推广种植。

Ecological adaptability tests of 55 late rice cultivars widely planted in Hunan were carried out in Shashi town(hilly area)and Daweishan town(mountainous area)of Liuyang City.The results show that the growth periods of 55 cultivars all were less than 122 day.The growth period of the same late rice cultivar was 1-4 days shorter in Shashi town(hilly area)than in Daweishan town(mountainous area).No rice blast and bacterial blight occurred in all cultivars,southern rice black stripe dwarf disease occurred slightly in individual cultivars in Shashi town(hilly area).In Daweishan town(mountainous area),Jinyou 88,Taifengyou 736,RunyouHuazhan,Zhongyou 218 and Longyou 4945 suffered from serious southern black stripe dwarf disease,Wuyou 821 suffered from serious rice false smut.No lodging was observed except for the slight lodging of JinliangyouHuazhan planted in Shashi town.Yuyou 852,ZhuoyouHuazhan,Ren5you No.1,HengFengyou 1179 and Wuyou 103 all had a overall good performance,yielding over 9000 kg/hm~2 with low disease incidence and mild symptoms;whether grown in Shashi or in Daweishan,these five cultivars have no significant differences in grain number per panicle,1000-grain weight,seed setting rate and effective panicle,so we suggest that they could be widely used in production.Taifengyou 736,Rongyou 18,Wuyou 821,RunyouHuazhan,Wuyou 61,Zhongyou 218 and DeliangyouHuazhan are poor in overall performance,not suitable for promotion in Liuyang area.