四川农田维管植物杂草分布区类型初探

在<四川农田常见杂草原色图谱>记载及实地调查的基础上,分析了四川农田常见杂草中维管植物科和属的区系特征.结果表明,四川农田杂草有维管植物81科332属651种(含变种和变型),其中外来入侵杂草48种.科的分布区类型分属5个类型4个变型,属的分布区类型隶属于15个类型11个变型,均以热带亚热带分布为主,温带成分占有一定的比例,体现了本区温暖湿润的亚热带气候为杂草提供了适宜的生长环境,温带成分占有一定的比例,表现出从热带亚热带向温带过渡的性质.世界分布的科属占有较大的比例,这些科属构成了四川农田杂草的主体;热带亚热带起源的植物较易入侵四川.

Primary Study of the Areal Types of Field Vascular Weeds in Sichuan Province

Based on the coloured atlas of field common weeds in Sichuan Province of China and investigating on the spot,this paper analyzed the characters of the areal types for field vascular weeds in Sichuan.The results showed that there were 651 species of field vascular weeds belonging to 81 families and 332 genera in Sichuan,in which there were 48 alien invasive species.The areal types of families could be classified into 5 areal types and 4 subtypes,and the areal types of genera belonged to 15 areal types and 11...