環境因子對文心蘭生育及開花品質之研究(二)
Date Issued
2001
Date
2001
Author(s)
李哖
DOI
892313B002190
Abstract
One and half year old plants which
one and half year after ex vitro and
with two pseudobulbs were cultivated
under greenhouse for one year. They
flowered year round in following year.
However,flowers also concentrated in
the spring and autumn which were
primarily affected by shoot sprouting
and growing temperature. Onc. Gower
Ramsey plants were treated with
different fertilizer concentration ,
the results showed that the flowering
% decreased in high fertilizer
treatment.The pseudobulb with flower
stalk contained above double concentration
of soluble carbohydrate
compared with non-flowering pseudobulbs.
It showed that accumulating
carbohydrate in pseudobulbs was an
important document of flowering. Onc.
Gower Ramsey and Onc. Sweet Sugar
plants had largger leaf area under
25/30 ℃ than 20/15℃ .However,fresh
weight of pseudobulbs and roots were
decreased.The development of roots
could be promoted under 20/15℃,but
2
leaf area was smaller.In
conclusion,the optimal temperature for
Oncidium to grow was 25/20 ℃ .The
experiment on the effects of different
temperature and light levels on
inflorescences development of Onc.
Gower Ramsey showed that branch number
of flower stalk and florets number
decreased at high temperature(35/30℃)
and low light level(60% shaded) The net
photosynthetic rate decreased rapidly
at high temperature(30/25℃).and the
light saturation point was about
200-300μmol· m-2s-1. In order to breed new
cultivar of Oncidium,we studied on capsule
set ratio of Oncidium and related genus by
using self-pollition.The result showed that
Onc. Sweet Sugar ‘Angel’, Onc. Java ‘Augie’
and Onc. Lanceanum could gain capsules,and
the capsule set ratio were 4%,6.7% and
60%,respectively the self-incompatibility will
further discussed.
Subjects
文心蘭
溫度
光度
肥料濃度
開花品質
碳水化合物含量
光合作用
自交
結莢率
SDGs
Publisher
臺北市：國立臺灣大學園藝學系暨研究所
Type
report
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