不同类型魔芋种芋的生长分析

通过对不同类型魔芋脱毒种芋的萌芽出苗特性、田间长势、分苗数、田间发病情况、产量、球茎膨大倍数、繁殖系数、生长周期等进行研究。研究结果表明，一级包衣种、二级种、三级种比原原种提前8～18天出苗；一级包衣种、二级种的分苗数较多；一级包衣种、二级种、三级种的田间发病率低于原原种，其中一级包衣种发病率最低，仅为7.4％。二级种、三级种综合性状较好，生产力水平高，膨大倍数高，可通过规模化生产得到大量种芋，解决生产中种芋缺乏的问题。

Analysis of Growth of Seed Corm of Different Konjac Types

We investigated the germination characteristics, field growth, the number of ramets, diseases in the field, yield, bulb expansion rate, propagation coefficient, the growth cycle in different types virus-free corms of Konjac. The results showed that first-degree coated seed corm, second-degree coated seed corm and third-degree coated seed corm were 8- 18 d earlier to germinate than the super-super-corms, and their ratio of infected plant were lower than that of the super- super-corms, of which the first-degree coated seed corm was the lowest （7.4%）. The second-degree coated seed corm and the third one had better integrated traits, the higher level of productivity, higher expansion rate, and they can be easily obtained by large-scale production in oder to solve the problem of the corms shortage.