Early Screening Trials of Provenance on Bruguiera gymnorrhiza in Shenzhen Bay of China

Prapogules of Bruguiera gymnorrhiza were collected from Qiongshan,Wenchang and Sanya of Hainan Island,Fangcheng of Guangxi, Leizhou, Lianjiang and Shenzhen of Guangdong respecitively, and planted in Shenzhen Bay for provenance trial at the same time. The experimental results for 4 years show that the difference of survival rate, height, basal diameter and biomass among 7 provenances reach significance. Among these provenances, Qiongshan provenance is the best one, whose survival rate, height, basal diameter and biomass are 90.0%, 1.54 m, 4.97 cm and 1.358 kg respecitively. The survival rate, height, basal diameter and biomass are 17.8%, 17.3%,12.2% and 55.9% higher than the worst Wenchang provenance respecitively, and are 5.5%,18.2%,9.0% and 6.1% higher than local Shenzhen provenance respecitively. The order of comprehensive evaluation on provenances from best to worst is: Qiongshan, Lianjiang, Shenzhen, Sanya, Fangcheng, Leizhou and Wenchang. Since the provenances of Wenchang and Leizhou did not adapt to Shenzhen Bay well, they are not recommended to be planted widely in the local places.