广西海岸潮间带互花米草调查研究

Investigation on Smooth Cordgrass(Spartina alterniflora)Along Guangxi Coastal Tidal Zone

2008年秋季对广西海岸互花米草（Spartina alterniflora）分布情况用手持GPS进行绕测调查.结果显示,广西互花米草群落面积为389.2hm2,95%分布于丹兜海,其余分布于山口镇北界村海滩（3.2%）和营盘镇青山头海滩（1.8%）.广西互花米草群落73%生长于淤泥质土壤,年均扩散速率为24%,明显低于华东沿海的30%～59%.互花米草于1979年引种到广西合浦县,在山口镇山角海滩引种成功,在党江镇沙埇海滩引种失败,营盘镇青山头是新发现的互花米草引种分布点.营盘镇青山头和山口镇北界村这两处海滩将是继丹兜海之后互花米草漫延的重灾区.

Smooth cordgrass（Spartina alterniflora）was introduced to Hepu county,Guangxi province in1979.The introduction was succeed in the beach of Shanjiao,Shankou town whereas failed in the beach of Shachong,Dangjiang town.Qingshantou of Yingpan town was a new place where Spartina alterniflora was transplanted.The size of Spartina alterniflora community along Guangxi coast was 389.2 hm2 in 2008,95% of the community distributed in Dandou sea and the others in the beach of Beijie,Shankou town（3.2%）and Qingshantou,Yingpan town（1.8%）.73% of Spartina alterniflora community grew in silt and its spreading rate is 24% in Guangxi,less than that along east coast of China（30%~59%）.The beach nearby Qingshantou,Yingpan town and Beijie,Shankou town will be infested seriously with Spartina alterniflora subsequent to Dandou sea.