姜堰市位于长江下游苏中平原，系典型的人多地少，后备资源制约型地区，且养殖业发达，粮经饲菜（肥）供求矛盾日趋突出。９０年代以来，该市针对稻麦长期连作，有机肥锐减，农田生态恶化以及口粮基本满足，饲料大量引进，麦稻出路不畅的实际，改革耕作制度，优化种植结构... Jiangyan City is located in the middle and lower reaches of the Yangtze River in the Soviet Union plain, Department of typical small population, reserve resource constraints in areas, and aquaculture developed, food and feed (fat) contradiction between supply and demand has become increasingly prominent. Since the 1990s, the city has made great efforts to reform the farming system and optimize the planting structure in response to the long-term continuous cropping of rice and wheat, the sharp decline in organic fertilizer, the agroecological deterioration and basic satisfaction of rations, the introduction of large quantities of feedstuffs and the poor access to wheat and rice.