适合衡阳市再生稻栽培的水稻品种筛选

Screening of Rice Cultivars Suitable for Ratooning in Hengyang City

为探明不同熟期、类型水稻品种再生栽培的生产力差异,选用在衡阳市大面积种植的13个中稻和1个晚稻品种,采用小区试验,比较参试品种头季和再生季的生育期、株型、抗性、经济性状及产量等因子的差异,为筛选适合衡阳市再生栽培水稻品种提供参考。结果表明:不同熟期品种头季、再生季和周年产量差异极显著;头季产量与生育期、日产量和有效穗数、结实率呈显著正相关,再生季产量与日产量、有效穗数、千粒重呈显著正相关,周年产量与头季的结实率及再生季的产量、日产量、千粒重呈显著正相关;深两优867、玮两优8612、韵两优332周年产量达1 000.0 kg/667m2以上,可以作为衡阳市再生稻栽培优先选用品种,深两优475、C两优华占、晶两优1468、隆两优1212、晶两优华占、Y两优911等6个品种表现较好,可根据当地种植实际表现选择。

This study compared the productivity of rice cultivars with different maturity seasons in ratooning,aiming to provide reference for screening suitable rice cultivars for ratooning in Hengyang City.A plot experiment was conducted with 13 mid-season rice cultivars and 1 late-season rice cultivar planted extensively in Hengyang City.The growth period,plant type,resistance,economic traits,and yield of the tested cultivars in the first and ratooning seasons were compared.The results showed that the cultivars with different maturity seasons demonstrated significant yield differences in the first season,ratooning season,and the whole year.The yield in the first season demonstrated significantly positive correlations with growth period,daily yield,effective panicle number,and grain-setting rate.The yield in the ratooning season had significantly positive correlations with daily yield,effective panicle number,and thousand grain weight.The annual yield showcased significantly positive correlations with the grain-setting rate in the first season,and the yield,daily yield,and thousand grain weight in the ratooning season.'Shenliangyou 867','Weiliangyou 8612',and'Yunliangyou 332'achieved the annual yields of over 15000 kg/hm2 and thus served as the preferred cultivars for the ratooning in Hengyang City.'Shenliangyou 475','C-Liangyou Huazhan','Jingliangyou 1468','Longliangyou 1212','Jingliangyou Huazhan',and'Y-Liangyou 911'with good performance could be selected according to local planting conditions.