Seedling-raising experiments of Adansonia digitata seeds with three different pretreated conditions were carried out. Meanwhile, the seed germination characteristics, seedling heights, ground diameter and phenological characteristics of seedlings were observed during two years. The results showed that, (1) the highest seed germination rate and germination power were 18.72% and 6.20% by dipping in 70 ℃ water. (2)The seedling heights and ground diameter increments followed an ‘S’ type growth curve, including slow-growing stage, fast-growing stage, lag-growing stage. The seedling heights and ground diameter grow fast from early July to early September, and the fast-growing point was occurred in mid-August. While the annual growth of A. digitata seedling heights and ground diameter was 81.9 cm and 12.6 mm. The seedlings had a good uniformity and growth quality, and the survival rate of transplant could be above 90%. (3) Seedling phenological characteristics were no significant difference according to the phenological records in Yuanyang dry-hot valley areas during two years, and could growth normally, which indicated A. digitata would be introduced successfully in Yuanyang dry-hot valley areas and maybe introduced successfully in other similar areas.
QI Guo-hai
,
ZHANG Yan-ping
,
WU Jiang-chong
,
SUN Heng
,
ZHENG Yi-xing
,
LIU Zi-yi
,
YANG Ming
,
LIU Jian-jin
,
WANG Xue-jian
,
ZHANG Ti-kun
. Seed Germination and Seedling Growth Rhythm of Adansonia digitata[J]. Subtropical Plant Science, 2018
, 47(04)
: 386
-390
.
DOI: 10.3969/j.issn.1009-7791.2018.04.015
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