甘薯藤蔓漂浮育苗快繁技术研究初报

【目的】探索优质、快速的甘薯育苗新方法,为甘薯种苗快速繁殖提供科学依据。【方法】采用漂浮育苗、固体基质育苗和土床育苗方法,观察3种育苗方式下薯苗的生长、发苗天数等相关生物学性状,并记载甘薯茎蔓的腋芽发生、叶数、苗高生长及发根情况。【结果】漂浮育苗处理甘薯茎蔓发苗时间最快（6d）,成活率最高（85.0%）,育苗发根数最多（9.7根）,根长最长（6.2cm）。【结论】甘薯茎蔓漂浮育苗具有发苗时间较快、管理成本低、薯苗壮实等特点,1个月内可达到成苗标准,在甘薯薯苗快繁中有较大的优势,值得推广应用。

Prime report on rapid propagation technique for sweet potato seedlings using floating culture system

Objective]The objective of the current study was to develop a fast method for production of high quality sweet potato seedlings,and to provide scientific basis for its rapid propagation.Method]Biological characteristics of sweet potato seedling were investigated using three different seedling cultivation methods,viz.,floating culture system,solid substrate culture system and soil-bed culture system.The status of growth and development of hairy root in axillary buds of sweet potato stem were recorded.Result]Culturing sweet potatoes in floating culture system showed the lowest time of sprouting（6 d）,the highest survival rate（85.0%） and root number（9.7 roots）,and the longest root length（6.2 cm）,compared to the other systems.Conclusion]Culturing sweet potato seedlings in floating culture system decreased sprouting time,improved the growth of seedlings and reduced the cost of management.Further,by using this technique,plantlets can be produced in one month only,which is advantageous for rapid propagation of sweet potato seedling.Floating culture system due to its time and cost saving characteristics is worth for popularization in sweet potato seedling productions.