播期对不同水稻品种生长特性的影响

Effects of Sowing Date on the Growth Characteristics of Different Rice Varieties

为优化南京地区最佳播期及最适品种,以水稻品种‘两优6326’、‘南粳44’为研究对象,对不同播期试验下水稻产量和生育期及产量构成因素进行了分析。结果表明:随着播期的推迟,水稻的生育进程也相应顺延,2种水稻全生育期均缩短;播期对‘南粳44’各产量构成因素无显著影响,而‘两优6326’有效穗数在不同播期处理间差异显著(sig=0.008,P<0.05);‘两优6326’的有效穗数、‘南粳44’的有效穗数及穗粒数sig值均小于0.05,均与产量呈显著性相关;‘两优6326’产量总体高于‘南粳44’。对2种品种适宜播期综合评价表明,该地区宜早种植籼稻‘两优6326’,及早熟晚粳品种‘南粳44’。

In this experiment, the effects of seeding time on the yield, growth duration and yield component were studied with‘Liangyou 6326’and‘Nanjing 44’as materials. With the delay of sowing date, birth process was postponed, and whole growth period of these two kinds of rice were shortened;the sowing date had no significant influence on the yield components of‘Nanjing 44’,but the effective panicles of‘Liangyou 6326’were different between different sowing date （sig=0.008, P〈0.05）. The effective panicles of‘Liangyou 6326’, the effective panicles and the grain numbers per spike of‘Nanjing 44’all had significant correlation with yield, with their sig value less than 0.05. In addition, the yield of‘Liangyou 6326’was higher than that of‘Nanjing 44’. The comprehensive evaluation showed that this area should plant these two kinds of rice early.