【Objective】The present paper aimed to explore the variation trend of weed community in paddy fields and the effect of grass control. 【Method】The weed communities and control effects of flat-cropping fish,flat-cropping ducks,flat-cropping rice,chamber-cropping fish, chamber-cropping ducks and chamber-cropping rice were investigated.【Result】There was a big difference in weed species between chamber farming and flat planting,flat cropping was mainly harmed by monocotyledonous weeds,annual weeds,and mid-late weeds,while chamber cropping was m...
