入侵植物五爪金龙生物学特性研究

Biological characteristic of invasive plant Ipomoea Cairica

通过栽培实验,观察入侵植物五爪金龙的形态学特征,测定两个不同生长期的生物量、根茎长度等指标,对实验数据进行统计分析,从几个方面研究五爪金龙的生物学特性.结果表明:生长期为6个月的五爪金龙生物量与生长期为3个月的五爪金龙生物量相比,根、茎、叶分别增长了2～5倍;平均含水量在7.41%～82.99%之间,两者无显著差异;两者之间的根冠比存在显著差异,但是跟其他草本植物相比,其根冠比相对较小;不同生长期的平均根长度分别为57 cm、87 cm,平均茎长度分别为319 cm、714 cm,两者之间的根茎比存在极显著差异.研究结果为进一步研究五爪金龙的入侵机制和控制五爪金龙的对策提供科学的理论依据.

Morphological characteristics of Ipomoea cairica was observed and they included biomass, length of root and stem etc. in two different growing periods and the data were analyzed statistically. The results showed roots, stems and leaves increased two to five times between 3-month old and 5-month old plants. Water content was among 7.41%~82.99% without any significant difference. Significant difference was observed for root/shoot ratio, in which the root/shoot ratio of Ipomoea cairica was lower than other herbaceous plants. Root lengths reached 57cm and 87cm, and mean stem lengths 319cm and 714cm at the two growth periods, with significant difference in root/stem ratio. Research results provide basic data for dealing with invasive species and controlling Ipomoea cairica invasion.