三年六熟五旱－水稻作，抛栽稻田的主要杂草（稗草、异型莎草、陌上菜和水莎草）发生频度和优势度降低，优势草种为鳢肠和下香蓼。麦田免耕３年，后茬抛栽稻田多年生杂草（眼子菜、矮慈菇、水莎草）的发生频度和优势度上升而一年生杂草（稗草、异型莎草）呈下降趋势。休闲３年，复种抛栽稻，稻田优势种为双穗雀稗、水芹、节节菜、眼子菜、水虱草等 The frequency and dominance of the main weeds (barnyard grass, alien Sesamia spp. And Sesamum indicum) in paddy field and paddy planting paddy in three years of six-year-old and five-arid dry-paddy decreased, Polygonum. The frequency and dominance of perennial weeds (Eichhornia crassipes, Dwarf Pleurotus, Acorus calamus) in the rice fields after the tillage for three years without tillage rose and that of the annual weeds (Echinochloa crusgalli, Cyperaceae) decreased . Leisure 3 years, throwing planted multiple cropping rice, paddy field dominant species of binary sparrows, cress, section dishes, eye plants, such as water lice grass