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对海南岛尖峰岭地区热带珍贵树种母生、海南石梓人工林下种植经济作物益智、咖啡的复合农林业系统的生态和经济效益研究表明：复合系统能显著促进主林层乔木的生长，胸径生长速度比对照地高出４３％～１３４％，材积生长高出１８％～８１％，生物量高出５％～８６％；生物量净积累量９．５３～１５．２３ｔ·ｈｍ－２·ａ－１，为对照地的１．６～５．１倍；系统的光能利用率为０．７８％～１．２６％，为对照样地的１．９４～５．０４倍；同时系统具有较高的经济效益，林下种植益智后的产值可达１．８～３万元·ｈｍ－２·ａ－１，为对照地的５．２６～９．８２倍，投入产出比为１∶２．９３～１∶４．１７。
The ecological and economic benefits of the symbiotic agroforestry system in the motherland of tropical precious tree species in Jianfengling area of Hainan Island and the planting of cash crops under the plantation of Shijiazhuang in Hainan Province indicated that the composite system could significantly promote the growth of tree species in the main forest, The DBH growth rate was 43% -134% higher than that of the control, the volume growth was higher by 18% -81%, the biomass was higher by 5% -86%, and the net biomass accumulation was 9.53-15.23 t · hm-2 · A-1, which is 1.6-5.1 times that of the control plots. The light energy utilization of the system is 0.78% -1.26%, which is 1.94-5.04 times of the control plots The system has high economic benefits. The output value after planting under the forest can reach as high as 1.8 to 30,000 yuan · hm-2 · a-1, which is 5.26 to 9.82 times that of the control field, and the input-output The ratio is 1: 2.93 to 1: 4.17.