[关键词]
[摘要]
目的研究春播和秋播两种不同播期菘蓝生长的差异、生殖生长特性以及这两种播期下菘蓝的结籽情况,为建立科学的规范化栽培技术提供理论依据。方法菘蓝播种出苗之后,定期进行采样,测定根系与苗系生长变化规律,开花后观察测定菘蓝开花结果情况。结果菘蓝经过春化在春季转暖后迅速抽薹,这一时期株高、冠幅等生物量变化非常明显;两种不同播期的菘蓝生长存在明显差异,春播菘蓝开花前生长明显优于秋播菘蓝,但是开花结果后倒伏严重,长势不如秋播菘蓝。结论两种繁殖方式生产的种子千粒质量、单株平均产量、公顷产量均有差异,但种子的发芽率差异不大,不影响来年生产;春播菘蓝生产的种子质量较秋播的高,但是生长后期要注意防倒伏;秋播菘蓝在秦巴山区和秦岭以南可以很好生长,南方地区两种种子繁殖方式均适宜,而北方地区更适宜于春播繁殖方式。
[Key word]
[Abstract]
Objective To study the growth differences of Isatis indigotica sown in spring and autmn, reproductive identity and seedy condition of I. indigotica sown in various times, so as to provide the theoretical foundation for scientific standardization of cultivating process. Methods I.indigotica was sampled at a fixed period. At each stage, the growth of seedling and root system was recorded, blooming and seedy condition was recorded in efflorescence. Results The results showed that I. indigotica turned into genesial cycle after thermostage and the change of plant height and crown of I. indigotica were evidence. There was obvious differences between I. indigotica sown in different times. I. indigotica sown in spring grew better than that sown in autumn before efflorescence, but it grew worse than I. indigotica sown in autumn after seeding. Conclusion The weight of thousand seeds, average yield of single plant, and acre yield are different between the two ways for reserving seeds, but the difference of germination rate of seed is indistinctive, it will not influence the yield next year. The seed quality of I. indigotica sown in spring is better than that sown in autumn, but it must pay regard to the plant falling problem. The two ways are both feasible in the south of China while sown in spring is more suitable in the north of China.
[中图分类号]
[基金项目]
陕西省攻关项目(2001K10-G15-03);麦迪森科研基金项目(mds01)