Sjemenarstvo, Vol. 29 No. 1-2, 2012.
Izvorni znanstveni članak
EFFECT OF MATURITY STAGE AND HARVEST TIME ON GERMINATION OF TOBACCO SEED
Jure Beljo
; Agronomski i prehrambeno - tehnološki fakultet Mostar
Bojan Livaja
; Agronomski i prehrambeno - tehnološki fakultet Mostar
Zrinka Knezović
; Agronomski i prehrambeno - tehnološki fakultet Mostar
Adrijana Filipović
; Agronomski i prehrambeno - tehnološki fakultet Mostar
Sažetak
The sum of the temperatures during growth and development is the most important
factor for the ripening of seeds. The aim of this study was to determine the effect of
harvest time and maturity grade on tobacco seed germination. To implement a set goal,
at the same time was performed an artificial pollination at 20-30 flowers on five plants.
After fertilization, 3-5 capsules at each plant were harvested in the intervals of 12, 16,
20 and 25 days after pollination. The level of ripening and color of capsule epidermis
during harvest were described. Only capsules picked in the fourth harvest time looked
as mature, while the capsules of other three harvest times seemed physiologically
immature. After completion of harvesting and drying, germination was tested.
Germination of seeds harvested 12 days after pollination was 69%, and germination of
seeds of other variants ranged from 82% to 91% respectively, meaning that according to
the percentage of germination those seed belong to the first class of commercial seed.
Although the seeds by the visual characteristics seem unripe, it had a satisfactory
germination. For the development and ripening, the seed need to accumulate a certain
amount of heat, which is denoted as the sum of heat units. For the physiological
ripening of the seeds in this study 300 to 350 heat units and 200 to 250 hours of
sunshine was sufficient. Analysis of variance showed that only the seed of first harvest
time had statistically reliable lower germination than the germination of control.
Germination of the other harvest dates was lower than control, but differences were not
statistically significant.
Ključne riječi
tobacco; seed; germination; germination energy; heat units
Hrčak ID:
99134
URI
Datum izdavanja:
24.9.2012.
Posjeta: 1.125 *