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[摘要]
目的研究温室内冬季基质育苗对抑制当归早期抽薹的效应。方法设播期、基质和种子3个因子,正交设计,3次重复。结果在15个处理中有7个处理抽薹率低于1%,其中最低抽薹率为0.14%;
另有7个处理抽薹率1%~5%;
另有1个处理抽薹率为19.93%。在总计45个小区中,40%的小区完全未发生早抽薹,另有46.7%的小区抽薹率低于5%。冬季育当归苗8月初茎节开始伸长,比传统苗推迟约70 d;
冬季育当归苗9月中旬为抽薹高峰期,比传统苗推迟约100 d。在15个处理的早抽薹植株中,有6个处理100%只抽生花茎不能成花,另有8个处理50%以上不能成花,另1处理38.9%不能成花。抽样测定不能成花当归的醇溶性浸出物的量为45.93%。3个因子均极显著影响当归早薹率,影响作用的主次顺序为播期、种子、基质。结论冬季基质育苗不仅可明显降低当归早抽薹率,而且可能规避抽薹,大幅度推迟抽薹期。
[Key word]
[Abstract]
Objective Inhibition of matrix seedling raising in winter greenhouse on premature bolting of Angelica sinensis.Methods Three factors of sowing periods,soil media,and seeds were tested in ortho-gonal design by repeated three times.Results In total 15 treatments,bolting percentage of A.sinensis in seven treatments were lower than 1%,among which the lowest was 0.14%;In the other seven treatments,the bolting percentages were 1%—5%,and in another treatment,it was 19.93%.No bolting happened in 40% of total 45 tested plots,and the bolting percentage was lower than 5% in other 46.7% tested plots.Stalk of winter raised seedlings started to produce at the beginning of August,which delayed 70 d compared to that of the traditional seedlings,bolting peak period of winter raised seedlings was in the middle of September,which delayed 100 d compared to that of the traditional seedlings.In total 15 treatments,100% of bolting plants only stalked,but no flowers produced in six treatments,over 50% of bolting plants only stalked,but no flowers produced in the other eight treatments,38.9% of bolting plants only stalked but no flowers produced in another one treatment.The sample test showed that ethanol extracts content of bolting plant root without flower was 45.93%.Influence in each one of these three factors to premature bolting percentage approached to the utmost notable difference,the influence sequence was sowing periods,seeds,and soil matrixes.Conclusion Premature bolting percentage of A.sinensis is not only obviously decreased by matrix seedling raising in winter greenhouse,but also the bolting can possibly be avoided,and bolting date be also delayed greatly.
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[基金项目]
甘肃省农牧厅生物技术专项资助项目(GNSW-2007-02)