在早熟茴香采种田，选择株型、花期一致的植株50株挂牌标记，从开花后第12 d开始每隔7 d测定不同节位花穗籽粒千粒重(鲜、干)、籽粒长宽，分析籽粒发育动态。结果表明，籽粒含水率下降最快的时期为灌浆高峰期，但灌浆强弱不同。头穗花籽粒灌浆速度、强度、干物质积累量始终较二穗花籽粒强，灌浆峰期提早，为籽粒灌浆强势花穗。头穗花适宜采收期为其开花后38 d；二穗花籽粒适宜采收期为头穗花开花后46 d。

50 plants with the same plant type and flowering period were selected for tagging in the field of early maturing fennel. From the 12th day after flowering， the fresh weight， dry weight， length and width of 1 000 grains were measured at each 7 days and the development trend of grains was observed. The results showed that the period of the fastest decrease of water content was the peak of filling， but the filling intensity was different. The filling speed， intensity and dry matter accumulation of the first spike was always stronger than that of the second spike， and the filling peak was earlier， head panicle flower is grain filling strong panicle. The suitable harvest time is 38 days after anthesis； the suitable harvest time is 46 days after anthesis.

S573

甘肃省农业科学院区域创新重点项目(2019GAAS50)。