播期对苏北盐碱地不同水稻品种生长发育进程及产量的影响

为了探究播期对苏北盐碱地环境下不同水稻品种的生长发育进程及产量的影响,本试验采用大田小区试验,调查和比较不同播期下‘南粳9108’和‘连粳11号’的生育期、干物质积累量、株高和产量等相关性状。结果表明：随播种时间推迟,‘南粳9108’和‘连粳11号’的全生育期变短;‘南粳9108’的拔节期、齐穗期和成熟期的干物质重呈减小趋势,‘连粳11号’呈先升后降趋势;播期对‘连粳11号’株高影响差异显著,且株高随播期推迟呈下降趋势;‘南粳9108’和‘连粳11号’的播种时间推迟,其有效穗、每穗粒数和产量呈下降趋势。‘南粳9108’在苏北盐碱地区的最佳播种时间为5月24日,‘连粳11号’为5月31日。

Sowing Date in Saline-Alkali Land of Northern Jiangsu: Effects on Growth and Development Process and Yield of Rice Varieties

To explore the effect of sowing date on the growth and development process and yield of different rice varieties in the saline-alkali environment of northern Jiangsu, this experiment adopted the field test to investigate and compare the growth periods, dry matter accumulation, plant high, yield and other traits of ‘Nanjing 9108’ and ‘Lianjing 11’ under different sowing dates. The results showed that: with the delay of sowing date, the growth period of ‘Nanjing 9108’ and ‘Lianjing 11’ became shorter; the dry matter accumulation at the jointing stage, full heading stage and maturity stage of ‘Nanjing 9108’ showed a decreasing trend, and ‘Lianjing 11’ showed an upward trend and then a downward trend. The effect of sowing date on the plant height of ‘Lianjing 11’ was significantly different, and the plant height showed a downward trend with the delay of sowing date. The postponing of the sowing date of ‘Nanjing 9108’ and ‘Lianjing 11’ decreased the panicle number, grains per panicle and yield. The best sowing date of ‘Nanjing 9108’ in the saline-alkali environment of northern Jiangsu is May 24, and that of ‘Lianjing 11’ is May 31.