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耕地生产力指数是指在研究地域范围内某一作物在某一地区的平均单产和整个地域平均单产的比值。此值削弱或抵销了一些影响单产的其它因素,能体现某一地区的耕地质量或土壤肥力水平与种植优势,为农业生态系统功能评价和土壤肥力研究提供了一个有力的手段。扬州市里下河地区兴化县的高指数较多,邗江县的低指数较多,主要和两地土壤形成特点与肥水输入势有关。
Cultivated Land Productivity Index refers to the ratio of the average yield of a certain crop in one region to the average yield of a whole region in the study area. This value weakens or cancels some other factors that affect yield, and can reflect the quality of cultivated land or the level of soil fertility and planting superiority in a certain area, which provides a powerful measure for the evaluation of agricultural ecosystem function and soil fertility. Xinghua County, Lixiahe District, Yangzhou City, the high index more, low Qijiang County more, mainly the formation of the two characteristics of the soil and fertilizer-water input potential.