| Summary: | 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.
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