苏北沿海地区播期和密度对苏垦118和扬粳805产量的影响

本试验分析了苏垦118和扬粳805在3个播期、2个密度处理下的产量等农艺性状。结果表明:2个品种都在5月22日浸种、33.33万穴/hm²密度处理下产量最高。相关性分析表明:苏垦118的产量与全生育期、高峰苗、有效穗数、株高、每穗粒数极显著相关,与结实率显著相关;扬粳805的产量与基本苗、高峰苗、有效穗数、株高、每穗粒数、千粒质量极显著相关。

Effects of Sowing Date and Density on the Yields of the Geng Rice Varieties Suken 118 and Yanggeng 805 in the Coastal Area of Northern Jiangsu Province

The present study evaluated the effects of sowing date and density on the yields and other agronomic characters of Suken 118 and Yanggeng 805,two Geng rice varieties.A field trial was carried out in 2019 in Yancheng City to investigate the effects of three sowing dates(soaking seeds on May 22,May 29,and June 5)and two sowing densities(303000 seedling holes/hm² and 333300 seedling holes/hm²).The results showed that the two varieties both attained the highest yield under the treatment with soaking seeds on May 22 and sowing density at 333300 seedling holes/hm².Correlation analysis showed that the yield of Suken 118 was significantly correlated with whole growth period,peak seedling density,effective panicle number,plant height,grain number per panicle,and seed setting rate;and the yield of Yanggeng 805 was very significantly correlated with basic seedling density,peak seedling density,effective panicle number,plant height,grain number per panicle,and 1000 grain weight.