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为了正确实施生物替代法防除外来入侵植物互花米草(Spartina alterniflora),构建由光照、盐度和土壤质地组合的生境条件,对互花米草与乡土红树林树种秋茄(Kandelia candel)和木榄(Bruguieragymnorrhiza)进行生境适应性试验.试验的每个因子设3个水平(双层遮荫,单层遮荫,全光照;海水,咸淡水,淡水;泥质,泥沙,沙质),按L9(34)正交表进行试验.结果表明:在双层遮荫条件下(光照度“,”To explore an active method of biological replacement in controling the invasive smooth cordgrass(Spartina alterniflora),the growth of S.alterniflora with native mangroves K.candel and B.gymnorrhiza was conducted in the combined environmental factors of illumination,salinity and soil texture.The 3 environmental factors were divided into 3 levels,respectively,namely Illumination level was double cover,single cover and full exposure;Soil texture was muddy,mud sandy and sandy;Water was seawater,brackish and freshwater.The experiment was designed by orthogonal L9(34).The results showed that S.alterniflora died within 90 days under the shadowed condition that the illuminance was less than 300 lux,whereas the K.candel and B.gymnorrhiza seedlings grew well.The growth of K.candel and B.gymnorrhiza seedlings needed shaded and mud soil condition while the former preferred freshwater and the latter preferred seawater.All of the 3 species plants presented high photosynthetic rate under the conditions of full exposure and low salinity water.