不同播期对再生稻信粳18产量及产量性状的影响

Effect of Different Sowing Dates on Yield and ItsCharacter of Ratoon Rice of Xinjing 18

为探究信粳18在豫南再生稻高产高效的最佳播期,研究5个播期处理对信粳18生育期、产量及产量性状的影响。结果表明,信粳18在豫南再生稻种植的适宜播期为3月9日—3月25日,最佳播期为3月17日,且在最佳播种期下,头季稻加再生稻稻谷产量可达827.0 kg·hm^(-2)。说明最佳播种期能够有效促进信粳18再生稻产量三要素(有效穗数、穗实粒数、千粒重)的协调发展,进而提升头季产量和再生稻总产量。

To investigate the best sowing date to achieve high yield and high effciency of Xinjing 18 in ratoon rice of southern Henan,in this study,five sowing date treatments were designed to analyse there effects on growth period,yield and yield traits.The results showed that,the suitable sowing date of Xinjing 18 was from March 9 to March 25,but the best sowing date was March 17,the grain yield of first season rice plus ratooning rice could reach 827.0 kg·hm^(-2) at the best sowing time.The results indicated that the optimal date could effectively promote the coordinated development of the three yield factors(effective panicles,grains per panicle and 1000 grain weight)of Xinjing 18 ratooning rice,and then the first season yield and the total yield of ratooning rice were increased.