【摘要】 为了掌握广东省农业生态系统中外来入侵植物的种类和分布状况,本文通过定点调查和线路调查的方法对广东省21市农业生态系统中205个样点的外来入侵植物进行了分析,共发现外来入侵植物28科90种。其中,菊科植物种类最多,有27种,草本植物有71种,它们分别占入侵植物总数的30.00%和78.89%。处于重度危害的入侵植物有22种;处于中度危害的植物有15种;处于轻度危害的植物有53种。在90种外来入侵植物中,71种来自美洲,占总数的78.89%;其他各洲相对较少。广域分布种最多,为40种,占总数的44.44%;全域分布种则最少,仅有7种,占总数的7.78%。由此可见,广东省农业生态系统入侵植物种类多,分布广,危害严重,需引起有关部门的高度重视。更多还原

【Abstract】 In order to master the species and distribution of exotic invasive plants of agricultural ecosystems in Guangdong Province, exotic invasive plants of agricultural ecosystems were surveyed by taking 205 samples with "point-survey" and "route investigation" in 21cities in Guangdong Province. A total of 90 species belonging to 28 families were identified, 27 species (30. 0%) belonging to the family Compositae. 71 species (78. 9%) were herbs. 22 species were considered high threat to local biodiversity, 15 species were classified as medium risk, and 53 species as low risk. Among the 90 species of exotic invasive plants, 71 species originated from America. Forty of invasive species were extensively distributed (present in more than 50% cities of Guangdong Province) , accounting for 44. 44% of the total invavise species, and only 7 species (7. 78%) were present in all the cities of Guangdong Province. The species of exotic invasive plants was abundant in agricultural ecosystems of Guangdong Province. The species distributed extensively and made serious damage to agricultural ecosystems, which should be paid attention to.更多还原