13种观赏草引种的生物安全性初探

为了防止观赏草的盲目推广带来生物灾害，该研究针对引入的13个观赏草品种分别从种子、不定根、检疫性病虫害3个方面分析了是否存在生物入侵的风险，并就观赏草生态适应性和在景观应用中的安全性进行了分析。结果表明，试验期间种子无自播现象；距离原始植株0.1～1.0 m半径范围内无蔓发性根发苗现象；未发现检疫性病虫害；水葱（Scirpus validus）和花叶水葱（S.validus ‘Mosaic’）与高抗逆性品种的关联度最高,为0.763 9，蒲苇（Cortaderia selloana）和矮蒲苇（C.selloana ‘Pumila’）稍次之,关联度为0.748 0；13种观赏草在园林景观中造成火灾危害的可能性极低。以上结果证明,所引品种在宁波地区种植存在生物入侵的可能性极低，可以在宁波及周边地区推广应用。

Preliminary study on the biological safety of 13 ornamental grasses species

In order to prevent the ornamental grasses bringing biological disasters for blind promotion,we identified the risk of alien biological invasion of the 13 species of introduced ornamental grasses by analyzing the seeds,adventitious roots and quarantine venereal insects.Meanwhile,the ecological adaptability and safety of the application of these ornamental grasses were also analyzed.The results showed that there was no sowing phenomenon during the experiment period.Meanwhile,we did not observe the phenomenon of root sprouting in a distance of 0.1-1.0 m from the mother plant and the quarantine venereal insects were not detected.Scirpus validus and S.validus cv.zebrinus were the highest resistance species and their correlation degrees with strong resistance variety were 0.763 9.Cortaderia selloana and C.selloana ’Pumila’ had a little less resistance than the species mentioned before and their correlation degrees were 0.748 0.The risk of causing fire for planting these ornamental grasses in the landscape was low.All above results proved that planting these 13 introduced ornamental grasses barely existed biological invasion in Ningbo and their application can be promoted in Ningbo and surrounding areas.