金边凤尾兰组培苗生长规律研究

The Growth Regulation of Yucca Gloriosa 'Variegata' Tissue Culture Seedlings

通过对金边凤尾兰组培苗的生长观测分析、组培苗与脚芽扦插苗和腋芽的生长比较、病害发生规律等研究，提出了金边凤尾兰组培苗的生长规律和合理的栽培措施。结果表明：金边凤尾兰组培苗3 a平均株高能达到73.6 cm，平均叶片数达193.7片，其中第1年生长较慢；金边凤尾兰叶片颜色每年红绿、黄绿交替变化；同等栽培条件，组培苗的生长最快，脚芽扦插苗次之，腋芽最慢，春季种植比秋季好；组培苗在8月练苗软腐病发病率最高，4 000倍浓度的农用链霉素处理效果最好；炭疽病发病一般在5-8月，其中6月最严重，减少雨淋，使用80%炭疽福美500倍液处理，可有效控制病情。

The growth regulation and reasonable cultural practice of tissue culture seedlings were put forward,through observation of its growth process,comparation with winter suckers or axillary buds and the outbreak rules of diseases.The results indicated： the average height of tissue culture seedlings in third year could reach 73.6 cm,average leaf number were 193.7.During the three years,the first year grow more slowly than other years.Under the same cultural conditions,tissue culture seedlings grow most quickly,following with winter suckers,and axillary buds were the last.They grow better in spring than in autumn.Leaf color of Yucca gloriosa Variegata＇ changed from red-green to yellow-green alternately every year.When tissue culture seedlings were domesticated,the occurrence rate of soft rot was the highest in august.The liquid of streptomycin sulfate（4 000） times had the best effect for soft rot;The peak period of Anthracnose generally appears in June.Lowering humidity or using the liquid of 80% ziram and thiram（500） times can control it effectively.