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通过６ａ试验，提出了杉木幼林与大豆立体复合经营模式，其中包括：选择抗旱、耐瘠、高产稳产、适宜杉木幼林立体经营的大豆良种（本试验从７８个品种中筛选出６个优良品种），适时播种（春大豆４月１日～１５日，夏大豆５月１５～２５日），合理的株行距（２０～５０ｃｍ）和每个播种穴合理留苗数（２～４株／穴），用钙镁磷出作基肥（２２５ｋｇ／ｈｍ２），因地制宜施少量氮肥（尿素３７．５～７５．０ｋｇ／ｈｍ２），适宜立体复合经营的杉木幼林应为造林后１～２ａ，林地应为阳坡，豆株与幼树的距离３３ｃｍ以上。杉木—大豆立体经营，不仅能增加粮食和直接经济收入，而且提高了光能利用率，改善林地小气候，减少林地水土流失，改良了土壤，使杉木幼林年生长量比一级提高２０％左右。
Through the 6a experiment, we proposed the three-dimensional compound management mode of young Chinese fir and soybean, including selecting the good soybean varieties which are drought-resistant, barren-resistant, with high and stable yield and suitable for young plantation of Cunninghamia lanceolata. Six elite cultivars were selected from 78 varieties, , Sowing timely (spring soybean April 1-15, summer soybean May 15-25), reasonable spacing (20 ~ 50cm) and the number of each seedling reasonably leaving seedling (2-4 plants / hole) (225kg / hm2) with calcium, magnesium and phosphorus, and a small amount of nitrogen fertilizer (urea 37.5-75.0kg / hm2) should be applied according to local conditions. Young Chinese fir plant suitable for three-dimensional compound management should be 1-2 years after afforestation, Slope, beans and saplings more than 33cm. The three-dimensional operation of fir and soybean not only increased grain and direct economic income, but also improved the utilization of light energy, improving the microclimate of forest land, reducing soil and water loss in forest land and improving the soil so that annual growth of young Chinese fir could be increased by about 20% compared with the first grade.