3. Results and Discussion
According to the determination, the thousand seed
weight was 9.039 g and seed average vigor was 32.7%.
It seems to be the reason of low germination rate of J.
mimosifolia.
From the table of seeds germination situation record
(Table 1), Germination started two days after sowing
and almost completed 16 days after sowing.
Germination of IAA treatments was not concentrated
and appeared three germination peaks (Figs. 1 and 2).
This showed that IAA could continue to promote
germination of J. mimosifolia seed. The germination
peak of NAA treatment appeared on day 8-9 achieved
5-8 seeds, and showed higher germination consistency
(Figs. 3 and 4). It showed abnormal germination and
seed decay phenomenon in the entire germination
process.
It showed 13.3% of germination rate and 11.7% of
germination potential without treatment (Table 2).
Seeds with 50, 100 and 200 mg L–1 IAA treatment
showed germination rate of 20.0%, 22.3% and 25.0%,
respectively, whereas the rate was 18.3%, 20.0% and
23.3% in 50, 100 and 200 mg L–1 NAA treatment.
There was significant difference between 100 and 200
mg L–1 and other IAA treatment, but only 200 mg L–1
NAA treatment had significant difference among
others. It showed that the seed germination rate and
potential significant improved with IAA or NAA
treatment and promoted more obviously with the
increase of the concentration. However, in the same
concentration conditions, IAA showed more
significant promotion on seed germination. In this
investigation, robust seedlings could be obtained from
germinated seeds and grow normally after
acclimatization (Fig. 5).