不同播期播量对扬麦23生育期及农艺性状的影响

以盐城市主推品种扬麦23作为研究对象,设置5个播期(10月31日、11月5日、11月10日、11月15日、11月20日),播期推迟1 d播种量增加0.5 kg/667 m²,比较扬麦23不同播期播量的生育期和部分农艺性状。结果表明:随着播期推迟,播种到出苗时间加长,最短7 d,最长19 d,播期对最终成熟期影响不大,10月31日、11月20日2个播期最终成熟期相差3 d左右;随着播期推迟,株高、有效穗数、穗粒数、千粒质量、最终产量等主要农艺性状均呈下降趋势,其中11月10日与11月15日2个播期最终产量由488.7 kg/667 m²极显著下降至455.4 kg/667 m²。生产上扬麦23在盐城地区适宜在10月31日—11月10日完成播种,宜控制基本苗在18万~20万株/667 m²。

Effects of Different Sowing Dates and Densities on the Growth Period and Other Agronomic Characters of the Wheat Variety Yangmai 23

The current research assessed the effects of different sowing dates and densities on the growth period and other agronomic characters of the wheat variety Yangmai 23,the main wheat variety grown in Yancheng City,Jiangsu Province.Five sowing dates(October 30;November 5,10,15,20)were set up;sowing density was increased by 0.5 kg/667 m² as sowing date was postponed by one day,which led to five sowing densities(15.0,17.5,20.0,22.5,and 25.0 kg/667 m²).We compared the growth period and other agronomic characters of treatments under the five sowing dates.The results indicated that with the delay of sowing date,the time period between sowing and emergence became longer,with the shortest of 7 days and the longest of 19 days.On the other hand,the five treatments had similar dates of final maturity.With the delay of sowing date,the main agronomic traits such as plant height,effective panicle number,grain number per panicle,1000-grain weight,and final yield all showed a downward trend.The treatment with the sowing date of November 10 attained the final yield of 488.7 kg/667 m²,while the final yield was only 455.4 kg/667 m² in the treatment with the sowing date of November 15.Therefore,for growing Yangmai 23 in Yanchengarea,suitable sowing dates are from October 31 to November 10,and appropriate basic seedling densities are in the range of 180000~200000 seedlings/667 m².