播种期对夏天无(Corydalis decumbens)块茎生长及主要药效成分的影响

Effects of Sowing Date on Tuber Growth and Main Medicinal Components of Corydalis decumbens

研究不同播种期对夏天无块茎生长及主药效成分的影响,旨在为改良夏天无栽培技术提供理论依据。结果表明:(1)随着夏天无播种期的推迟,其出苗和新块茎形成时间相应推迟,但播种期对其地上部枯萎时间无影响;另外,播种早的材料能够开花,而播种晚的材料不能开花。(2)在3月下旬,不同播种期夏天无块茎生长均呈迅速上升的趋势,而从4月5日起,10月23日和11月4日2个时期播种的块茎其生长量呈现下降趋势,11月14日和11月25日两播种期播种的块茎生长呈现继续缓慢上升趋势;另外,开花前块茎生长迅速,开花后则块茎生长量下降,在花期对夏天无进行摘花处理可显著增加块茎产量。(3)不同播种时间对夏天无主药效成分原阿片碱和延胡索乙素含量的影响差异不显著。试验表明,夏天无在10月下旬至11月上旬播种为宜。

The effects of different sowing date on tuber growth and main medical components of Corydalis decumbens were studied to provide the theoretical basis for its cultivation technology. The results showed that both its germination and new tuber formation was delayed correspondingly with the sowing date postponed, however, the withered date of overground parts was less affected by the sowing date; The C. decumbens was able to bloom under the earlier sowing condition but not when it was later sowed. In late March, the tuber had grown rapidly in all sowing dates, nevertherless, the tuber growth declined on the two sowing date of October 23 and November 4. The growthof the tubers sowed on November 14 and November 25 had risen since April 5. The tuber had rapid growth before bloom, but declined after blooming, in addition, it could increase the tuber yield of Corydalis decumbents with the treatment of defloration in the flowering period. The effects on main medical protopine and tetrahydropalmatine component of C. decumbens were insignificantly under different sowing dates. The suitable sowing date of C. decumbens was in late October to early November.