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耕地化肥平均使用量(投肥量)是常被用来比较和评价不同国家或地区化肥使用水平及农业发展的基本统计数据。但由于这一数据较易受到诸如人口、耕地类型、作物结构和年复种指数等因素的影响而难以客观、全面地反映化肥使用的真实状况。为此,建议使用一个新的、结合人口和耕地等状况的施肥量统计指数,称投肥指数PLFI。这一指数可以单独使用,也可与耕地化肥平均投肥量等数据结合使用。
The average amount of arable land for fertilizer use (fertilizer) is often used to compare and evaluate the level of fertilizer use in different countries or regions and basic statistics on agricultural development. However, as this data is more vulnerable to such factors as population, cultivated land types, crop structure and annual multiple cropping index, it is difficult to objectively and comprehensively reflect the actual status of fertilizer use. To this end, it is recommended to use a new fertilizer index that combines the status of population and arable land and other indicators, said the fertilizer index PLFI. This index can be used alone, but also with the average fertilizers and other fertilizers and other data used in combination.