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通过对郁闭后的北京杨片林进行人工强化配置，建立了林—菇、林—羊和杯—菇—蚓—鸡结构。以片林结构为对照，采用综合格数法对４种结构的能流、物流、经济生态效益进行了综合定量分析。结果表明，３种人工强化配置的片林结构，能显著提高平原片林的总体效益。尤其是林—菇—蚓—鸡结构，在科学用能，高效利用时间、空间和直接经济效益等方面，具明显优势。
The forest-mushroom, forest-sheep and cup-mushroom-earthworm-chicken structure was established by artificial strengthening the Beijing poplar forest after closed. Taking the Plinth structure as a control, the comprehensive grid number method was used to comprehensively quantify the energy, logistics and economic benefits of the four structures. The results showed that the three kinds of plantation structure with artificial reinforcement could significantly improve the overall benefit of plain forest. In particular, the forest - mushroom - earthworm - chicken structure, in the scientific use of energy, efficient use of time, space and direct economic benefits, with obvious advantages.