深圳湾红树植物木榄种源筛选早期试验

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

分别从海南省的三亚、文昌、琼山,广西的防城,广东省的雷州、廉江和深圳采集木榄胚轴,同时种植在深圳湾作种源试验。通过4a的试验表明,7个种源间的成活率、树高、地径和单株生物量的差异达到显著或极显著水平,其中以琼山种源表现最佳,其成活率、树高、地径和生物量分别为90.0%、1.54m、4.97cm、1.358kg,比表现最差的文昌种源分别提高17.8%、17.3%、12.2%、55.9%,比本地的深圳种源分别提高5.5%、18.2%、9.0%、6.1%。根据种源综合评定结果,各种源的优劣排列顺序为:琼山、廉江、深圳、三亚、防城、雷州、文昌。鉴于文昌、雷州种源在深圳湾适应性差,不宜在本地区种植推广。

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.