一、前言長江下游分布着广大的圩区,这是一个雨水丰沛,气候溫暖,盛产大米的主要地区,享有“谷仓”之称。如安徽省蕪湖专区:圩区的面积約占全区总面积的三分之一,而粮食产量却占全专区的一半;同时圩区內还可以从事各种副业生产如:养漁、种藕等。由 I. Introduction The lower reaches of the Yangtze River are dotted with vast polders. This is a major area with rich rainfall, warm climate and abundant rice, enjoying the title of “barn”. For example, the area of ​​Wuhu in Anhui Province covers an area of ​​about one-third of the total area of ​​the whole area, while the grain output accounts for half of the entire area. At the same time, polder areas can also engage in various sideline production such as raising fish and planting lotus root Wait. by