日光温室冬季育苗抑制当归早期抽薹的效应研究

目的:研究日光温室内冬季育苗对抑制当归早期抽墓的效应.方法:设播期单因子4水平,随机排列,3次重复.结果:冬季育苗的播种期对当归苗的生长、成苗,及定植后的生长、抽薹、产量形成和品质都有重要影响,其中极显著影响产量.冬季育当归苗7月中旬茎节开始伸长,比传统苗推迟约50 d;7月下旬为抽薹高峰期,比传统苗推迟约40 d.冬季育当归苗早期抽薹率最高为1%,最低为0.11月28日播种的当归苗,成药产量、根折干率、醇溶性浸m物、挥发油和阿魏酸含量5项指标最高.综合认为,当归冬季床播育苗最佳播种期应选择11月末至12月中旬.结论:冬季育苗可明显抑制当归旱抽薹,最佳播种期应选择11月末至12月中旬.

Inhibition of winter seedling raising in greenhouse of prematurebolting in Angelica sinensis

Objective : To study the inhibition effect of winter seedling raising in sunlight-greenhouse on premature bolting of Angelica sinensis. Method : One factor of sowing date with 4 levels was tested at random design with 3 repeats. Result : Sowing date of winter seedling raising had an important effect on seedling growth, seedling mature, plant growth, premature bolting, yield, quality, and extreme significant effect on yield. The bolting date of winter raised seedlings started in middle of July, 50 d later than tranditional seedlings, and bolting peck date was in the last ten days of July, 40 d later than the traditional seedlings. The highest ratio of premature bolting for winter raised seedlings was 1%, and the lowest was 0. A. sinensis roots sowed in November 28 had the highest yield, root dry ratio, ethanol extract, essential oil and ferulic acid contents compared to that in other sowing dates. The best sowing time was from end of November to middle of December. Conclusion : Premature bolting of A. sinensis could be greatly inhibited by winter seedling raising, end of November to middle of December would be the best sowing time for winter seedling raising in greenhouse.