本文运用多元统计方法将福建省中低产稻田划分为四种稻作气候层和三种土壤类型，即１２种生态类型。对各类型土壤的生产潜力进行了分析，揭示了影响其产量的主要因素，提出了改良中低产稻田的有效措施。同时指出了必须运用产量指标、热量指标、经济价值指标、产投比指标及再利用系数，才能全面衡量系统生产力水平，充分发挥稻田的最大效能。 In this paper, multivariate statistical methods are used to divide middle and low-yield paddy fields in Fujian into four paddy climatic layers and three soil types, ie 12 ecotypes. The potential productivity of various types of soils was analyzed, the main factors affecting the yield were revealed, and the effective measures to improve middle and low yield paddy fields were put forward. At the same time, it is pointed out that it is necessary to use the output index, calorie index, economic value index, production / input ratio index and reuse factor in order to fully measure the level of system productivity and give full play to the maximum efficiency of paddy fields.