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在浙西桔园红壤中施用粉煤灰和铁尾矿，并套种牧草（苏丹草），可改善红壤的物理、化学及生化性质，促进牧草对养分的吸收，增产效果明显
Application of fly ash and iron tailings in the red soil of orange orchard in western Zhejiang and intercropping of forage grass (Sudangrass) can improve the physical, chemical and biochemical properties of red soil and promote the absorption of nutrients by pasture, and the effect of increasing yield is obvious