Studies on corm and cormel production in Gladiolus grandiflorus

• Main Authors: Wu,Jyh-fang, 吳志方
• Other Authors: Lee Nean
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/51111519136857098030

碩士 === 國立臺灣大學 === 園藝學系 === 81 === Corm and cormel production of gladioli was studied in southern part of Taiwan. The best time to harvest corms and cormels was two to four weeks after flowers harvesting when using No.3 medium-size corms to produce cut flowers and corms of gladiolus during winter in southern part of Taiwan.It was suggested to leave four leaves on stem at harvesting flowers to get both favorable-length stalks and large quantity corm production. ''Spic and Spic''was proved to be a heat-tolerance cultivar for summer crops. Cormels were planted after October when the temperature became cool. With the increasing of days after cormels plan- ting, mother cormels and absorbing roots would shrink and weaken. Weight of shoot was increasing at beginning, and then leaves turn senescent after all leaves were emerged. Changes of weight in contractile roots showed the same trend as that in shoot, and then contractile roots would contract and turn fiberous. Basal part of shoot began to swell up af- ter planting and formed into daughter corm. When two leaves emerging, buds of stolon could be observed on sheath leaves nodes between daughter corm and mother corm.Stolon tip would swell and then cormels were formed. With the growth and development of corm, starch content was increasing, and it could accumulate up to 40% dry weight of corm. Dormancy of cormels could be broken totally after 5 mon- ths of 5Ｃ storage. According to results of three corm production trials, the potential for corm production in Taiwan was discussed. We could get No.3 and No.2 corms after 4 to 5 months of cormels planting.It''s suggested to cut spikes competing nutrition in corm production. Smaller sized cormels (dia. below 5mm) were of potential to produce corms.