一、研究方法此文是根据农科院稻田轮作试验有关土壤分析结果整理的。轮作试验以广东省普遍8种复种方式为基础,组成4种不同的3年轮作制。设计处理: Ⅰ1.麦稻稻——肥稻稻——冬闲稻稻 2.肥稻稻——冬闲稻稻——麦稻稻 3.冬闲稻稻——麦稻稻——肥稻稻Ⅱ1.麦稻稻——肥稻稻——蚕豆稻稻 2.肥稻稻——蚕豆稻稻——麦稻稻 3.蚕豆稻稻——麦稻稻——肥稻稻 First, the research methods This article is based on the results of soil analysis of the results of the Rotation Experiment of Paddy Crops in the Academy of Agricultural Sciences. The rotation test is based on the eight kinds of multi-cropping methods commonly used in Guangdong Province and consists of four different three-year rotation cropping systems. Design and Processing: Ⅰ1. Wheat Rice - Fatty Rice - Winter Rice Rice 2. Fatty Rice - Winter Rice - Rice Rice 3. Winter Rice - Wheat Rice - Fat Rice Ⅱ1. Wheat Rice - Fatty Rice - Broad Bean Rice 2. Fatty Rice - Broad Bean Rice - Wheat Rice 3. Broad Bean Rice - Wheat Rice - Fat Rice