晚粳稻新品种适应性筛选与高产示范研究

High Yield Demonstration and Adaptability Screening of New Japonica Late Rice Variety

在2015年晚粳新品种筛选试验的基础上,于2016—2018年以甬优538为材料进行双晚与一季晚稻高产示范.结果表明:甬优538株型较矮,不定根发达,茎秆健壮,基部节间短,叶片厚、挺,叶角小,叶色前深后淡,转色顺畅,熟相清秀,穗粒结构协调,稻穗一、二次枝梗分生量大,谷色黄亮;甬优538双季晚稻产量达9831~10512kg/hm^2,日产量80.57~86.16kg/(hm^2·d),比对照桃优香占平均增产2257kg/hm^2,增幅28.83%;单季晚稻平均产量达12324kg/hm^2,日产量79.167kg/(hm^2·d),比对照Y两优900增产3608kg/hm^2,增幅41.4%,差异均达极显著水平(P<0.01);甬优538属于强感光性品种,从5月至6月24日播种均能在10月中下旬成熟,并获得高产,比当地主推的杂交水稻品种丰源优299增产效果显著,适宜双季稻全程机械化高产栽培.

Based on the new variety comparison experiments and demonstrations of Indica-Japonica hybrid rice in Hengyang County in 2014 and 2015, Yongyou 538 was planted for the high yield demonstration of double-season and one-season late rice in 2016-2018. The results showed that Yongyou 538 had short plants, developed adventitious roots, strong stems, short basal internodes, and good maturing perfermance. As the double-cropping late rice, the yield of Yongyou 538 reached 9 831-10 512 kg/hm^2, and its daily yield per hectare was 80.57-86.16 kg/d, which was 2 257 kg/hm^2 and 28.83% higher than that of the control Taoyou Xiangzhan, respectively;as the singlecropping late rice, its average yield was 12 324 kg/hm^2, daily yield was 79.167 kg/(hm^2·d), 3 608 kg/hm^2 and 41.4% higher than that of the control Y Liangyou 900. Yongyou 538 is a highly photosensitive variety, even sowed early in May or late on June 24, it will mature in middle or late October definitely with a high yield, which is significantly superior to Fengyuanyou 299, a local main hybrid rice variety. Furthermore, Yongyou 538 is suitable for the whole course mechanized cultivation of the high yield double-cropping rice .