从去年开始,我室对南京地区公园杂草种类和群落分布进行了系统的调查。还进行了花卉、苗圃及草坪杂草化学防除的研究,并已取得了初步成果。 今年按系统调查方案,对杂草种类、不同的杂草群落的分布和生境、杂草多度和发展趋 Starting from last year, I conducted a systematic survey of weed species and community distribution in parks in Nanjing. We also conducted research on chemical control of flowers, nurseries and lawn weeds and have achieved preliminary results. This year, according to the systematic investigation plan, the weed species, the distribution of different weed communities and the habitat, weed abundance and development trend