不同播期下绛三叶生长状况、花期和产量的变化

Effects of sowing dates on growth,flowering,and yield of crimson clover

为了解绛三叶(Trifolium incarnatum)生长发育与不同播种期之间的关系,通过田间试验,研究了不同播种期对绛三叶越冬状况、花期、株高、草产量和种子产量等指标的影响。结果表明:在试验设置的播期范围内,随着播种期的推迟,绛三叶的出苗、开花时间也延长,但生育期缩短。10月22日之前播种,不仅可以确保绛三叶的高出苗率,其越冬率还可达84%以上。10月15日播种,绛三叶生物量最高,为12.01 g·株^(−1);10月22日播种,绛三叶的空荚率最低,仅有15.40%;种子产量最高,为0.6632 g·株^(−1)。综上结果,扬州地区绛三叶在10月15日至10月22日播种有利于提前花期、收获高的草产量和种子产量。

To determine the relationship between the growth and development of crimson clover(Trifolium incarnatum)and different sowing dates,the effects of different sowing dates on overwintering status,flowering date,plant height,grass yield,and seed yield were analyzed through field experiments.The results showed that within the range of the sowing dates applied in this experiment,delays in the sowing date led to later emergence and flowering time of crimson clover the next spring,but the growth period was shortened.Sowing before October 22 not only ensures a high crimson clover emergence rate but also that the overwintering rate reaches more than 84%.The highest yield of crimson clover sown on October 15 was 12.01 g per plant;when sown on October 22,the empty crimson clover pod rate was the lowest(15.40%),and the highest seed yield was 0.6632 g per plant.Therefore,sowing on dates from October 15 to October 22 in the Yangzhou region is beneficial for advancing flowering date and ensuring high grass yield and seed yield at harvest.