高原粳稻品种在云南籼稻种植区的生态适应性分析

Analysis on ecological adaptability of different plateau japonica rice varieties in indica rice planting area of Yunnan province

为研究高原粳稻品种在云南籼稻种植区的生态适应性,以杂交籼稻宜香725为对照品种,选用6个优质高产抗病耐寒的高原粳稻品种为试验材料,比较各品种生育期、农艺性状、经济性状、产量、抗病性等特征特性。结果表明,高原粳稻在该地籼稻区均能正常安全成熟,生育期与对照品种相当或略短于对照,产量与生育期呈显著正相关。各粳稻品种的生育期为155~161d,产量为6939.0~10374.0kg/hm^2,其中云粳39号的生育进程与对照品种同步,生育期161d,产量最高,极显著高于对照,且综合性状好,抗逆性较强,可见云粳39号较适宜于该地籼稻区示范推广种植。楚粳28号和云粳26号的产量分别为9738.0和9676.5kg/hm^2,略低于对照籼稻品种,在当地生产上有一定的应用价值。

In order to study the ecological adaptability of japonica rice varieties of plateau in local indica rice planting area of Yunnan province, the growth duration, agronomic characters, economic characters, yield and disease resistance of six plateau japonica rice varieties with good-quality, high-yield, resistance to disease and cold tolerance were analyzed by using Yixiang725(hybrid indica rice variety) as control variety. The results showed that japonica rice varieties of plateau could mature safely, and their growth duration was the roughly same level or slightly less than the indica rice variety controt in local indica rice planting area. There was a significant positive correlation between growth duration and yield. The whole growth duration of japonica rice varieties was between 155 and 161 days, and their yield was between 6 939.0 and 10 374.0 kg/hm^2. The whole growth duration of Yunjing39 was 161 days, which was similar to Yixiang725. In all tested varieties, the yield of Yunjing39 with good comprehensive properties and strong stress resistance was the highest, and was significantly higher than the hybrid indica rice variety control. According to the results, Yunjing39 was suitable for local indica rice planting area. The yields of Chujing28 and Yunjing26 were 9 738.0 kg/hm^2 and 9 676.5 kg/hm^2, which were slightly lower than indica rice variety control, but they had a certain application value in local production.