Investigation on Weeds in Vegetable Fields in the Northern Suburbs of Meizhou City, South China

6th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Yang, Qihe^1 ; Zhang, Caixia^1 ; Yin, Xiaojuan^1 ; Yang, Hesheng^1

Jiaying University, Meizhou, Guangdong

514015, China^1

关键词: Alternanthera philoxeroides;    Degree of damages;    Domestic sewage;    Invasive species;    Light intensity;    Tropical zones;    Vegetable crops;    Vegetable Field;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/472/1/012067/pdf
DOI  :  10.1088/1757-899X/472/1/012067

来源: IOP

【 摘 要 】

There were a total of 81 weed species in the northern suburbs of Meizhou, belonging to 34 families and 71 genera, and most of them were dicotyledons. Asteraceae and Gramineae were the dominant families. The genera were mainly distributed in the tropical zone, accounting for 71.83% of the total species, with a strong tropical. The short-lived weeds in the first and second year accounts for 53.09% of the total species, and there were more annual weeds. From the light intensity adaptability point of view, these vegetable weeds were dominated by light-demanding and shade-tolerant plants. From the standpoint of water adaptability, most of them were mesophytes. Weeds with a high degree of damage to vegetable crops were usually herbs, meeting the R countermeasures, having strong ecological adaptability, strong reproduction ability, and high competitiveness, and can spread rapidly in the wild. In addition, a total of 19 alien invasive species were found in this weed community, with the largest number in the Asteraceae family and most originating from tropical America. Among them, Alternanthera philoxeroides,Wedelia trilobata, etc. can form a single superior community, causing great harm. These weeds have strong resistance to herbicides, insecticides, domestic sewage, etc., so how to control them is still a difficult problem.