针对近年珠三角地区菜田连作出现的突出问题,采用“123种植模式”(菜-中晚稻-菜”轮作模式)与当地传统的“早稻或晚稻-蔬菜”轮作及蔬菜连作等几种模式进行经济效益比较分析。结果表明,“123种植模式”的经济效益最佳,其中“白瓜-中晚稻-番茄”模式每667 m2的年产值和年纯收益分别达到12 377元和10 931元,实现了在最有利于种植高效作物的高效生产时段优先安排种植高效作物,并较好地发挥了作物间对气候、土壤生态条件利用的互补作用,从而达到耕地综合效益最大化。 In response to the prominent problems in the continuous cropping of vegetable fields in the Pearl River Delta region in recent years, several models such as the “123-planting mode” (vegetable-middle-late rice-vegetable rotation mode) and the local traditional “early rice or late rice-vegetable” rotation and vegetable continuous cropping are adopted The results showed that “123 planting mode” had the best economic benefit, of which the annual output value and annual net profit per 667 m2 of “white melon-middle-late rice-tomato” model reached 12 377 yuan and 10 931 yuan respectively, In order to achieve the goal of maximizing the comprehensive benefits of arable land, we should give priority to the planting of high-efficient crops at the most efficient time for planting high-efficient crops, and give full play to the complementary roles of crops in the utilization of climate and soil ecological conditions.