Abstract:

Several arboreal mangrove species were introduced from, Hainan Island, Zhanjiang of Guangdong Province, Australia and etc. to Shenzhen Bay. With good adaptability and cold_resistance during seedling stage, Sonneratia apetala could develop and blossom well in Shenzhen Bay. S.caseolaris had comparatively weak cold-resistance, but in warm habitat it could pass the winter smoothly. At the age of seven, S.caseolaris blossomed and the mean tree height and basal diameter reached 9.9m and 22cm respectively. The cold resistance was enhanced significantly with years. Bruguiera sexangula grew and developed well because of a cold resistance with of an increasingly strong to medium at the seedling stage. The mean height of 7-year-old trees was 2.8 m. Its propagules(plumular axis) would exist for about 3-6 days at about5℃, but injured for too long time. B.stylosa could pass the winter smoothly in specific warm habitat, the cold resistance increased with age increasing, and the trees could blossom. Avicennia marina var. australasica had a relatively strong cold resistance during seedling stage. But seedlings tended at the forward mudflat would die for duck gnawing. Some seedlings planted in the higher area of mudflat could grow very well and blossom partly. Neither R.apiculata nor Nypa fruticans acclimated in Shenzhen Bay (which with high latitude and low temperature). B.parviflora introduced from Australia was required to observe further.

Key words: Mangroves, Introduction, Cold resistance, Growth