播种期对普那菊苣生长发育的影响

Influence of sowing dates on growing and developing of Cichorium inlybus

通过普那菊苣的播期试验与生长发育关系的研究,结果表明:随着播种期的推迟,普那菊苣株高和产草量极显著下降,分别从202.1 cm,64119.0 kg/hm2下降到47 cm,10 552.5kg/hm2,降幅分别为0.4%～330.0%和50.12%～507.62%;播种期推迟,生育期明显缩短,从157 d减少到135 d,4月中旬以前播种能开花结实,但种子千粒质量和种子产量随着播种期的推迟而逐渐下降,5月3日以后播种不能完成整个生育周期,6月上旬以后播种不能正常抽苔拔节.故适当早播是提高普那菊苣产草量和种子产量的重要措施.结合贵州南部气候特点,其种植利用时间以2月中下旬播种较为适宜.

The relationship between sowing dates and growth of Cichorium inlybusL, cv. Puna was studied. The results showed that the fresh yield and height of Cichorium inlybusL, cv. Puna declined greatly with putting off sowing dates. The height and fresh yield dropped from 202.1 cm,64 119.0 kg/hm^2 to 47 cm,10 552.5 kg/hm^2. The bearing period shortened 135-157 d with putting off sowing dates. Although bloom and seed can mature when sowing before the middle of April, the weight of one thousand grain seeds dropped gradually with putting off sowing dates. It couldn＇t complete whole bearing period when planted after the third of May. Thus the importance measure of increasing fresh yield and seed yield is suitable seeding period. The best period of sowing date is the middle to the last of February in the south of Guizhou.