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在苍梧试点的水土流失地建立了7个地表径流测定场，通过3年多的观测，马占相思纯林模式和马占相思与湿地松的异龄混交林模式，水土流失量分别比对照减少50．70％和17．77％，年平均含沙量分别比对照减少50．35％和42．06％，马占相思＋湿地松异龄混交林中，对湿地松生长具有显著的促进作用，第4年湿地松高生长比对照提高16．47％。在果园径流场中，黄皮果园间种扶芳藤模式的水土流失量和含沙量分别比对照减少90．36％和65．78％。试验认为苍梧县严重水土流失地采用马占相思纯林、马占相思与湿地松异龄混交林和黄皮果园间种扶芳藤等模式既有较好保土保水作用，又有较好的经济效益，是较佳的生态经济型经营模式。
Seven surface runoff measurement sites were set up in the soil and water loss experiment in Wugu County. After more than three years of observation, the pure forest model of Acacia mangium and the heterogeneous mixed forest model of Acacia mangium and Pinus elliottii were compared with the control And the average annual sediment concentration decreased by 50.35% and 42.06%, respectively. Compared with the control, the average annual sediment concentration of Acacia mangium + P. elliottii mixed forest was significantly lower than that of the control In the fourth year, the height of Pinus elliottii increased by 16.47% compared with the control. In the orchard runoff field, the amount of soil and water loss and the sediment concentration in the Huangpi orchard with Euonymus fortunei reduced by 90.36% and 65.78% respectively compared with the control. It is concluded that the Cunninghamia lanceolata pure forest, the mixed forest of Acacia mangium and Phyllostachys edulis, and the species of Euonymus fortunei between yellowwood orchards and so on are considered to have better soil conservation and water retention in the serious soil erosion in Cangwu County. The economic benefits, is the better eco-economic management model.