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本文通过对建国以来四川省主要农区144县,有代表性的八年的土壤养分收支资料的统计,说明农业物质循环规模是逐年扩大了,化肥在扩大农业物质循环中已逐渐占主导地位;土壤养分逐年有所累积,肥力应是上升的;有机肥是维持农业物质循环的物质基础,在施用有机肥的基础上,合理配合化肥施用,是维持和迅速扩大农业物质循环,提高土壤肥力的重要途径。
Based on the statistics of soil nutrient balance in 144 counties in Sichuan Province since the founding of the eight major agricultural regions in Sichuan Province, the scale of agricultural material recycling is expanding year by year. Fertilizers have gradually dominated the expansion of agricultural material circulation ; Soil nutrients accumulated year by year, fertility should be increased; organic fertilizer is to maintain the material basis of agricultural material recycling, based on the application of organic fertilizer, with the rational use of chemical fertilizers, is to maintain and rapid expansion of agricultural material circulation and improve soil fertility Important way.