平阳万全位于浙江南部飞云江南岸,属典型的水网平原地区。土壤均为青紫坤粘土。由于該区劳力不足,加上过去水利条件不良,常易发生內涝灾害,因而形成了冬耕晒白的耕作制度,土壤长期缺少施肥管理,造成土壤物理性状日趋恶劣的大片垟心低产田。实践証明,在垟心低产田上种好綠肥是改良土壤、培肥地力,迅速提高粮食产量的 Pingyang Wanquan is located in the southern bank of Feiyun River in southern Zhejiang, belonging to a typical water network plain area. The soil is blue purple clay. Due to the lack of labor in the area and the poor water and water conditions in the past, waterlogging is often prone to occur. As a result, the cultivation system of winter-sunning and sunning has been formed, and the long-term lack of fertilization and management of soil has resulted in a large area of ​​low-yielding fields with deteriorating soil physical properties. Practice has proved that planting good green manure in low-yielding fields is to improve the soil fertility, rapid increase in grain yield