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北京西山地区油松和乔灌木树种混交林30多年的经营实践说明,紫穗槐和黄栌是油松较好的混交伙伴,它们的混交林比纯林有明显优势,单位面积蓄积量大36.1%～67.3%;混交林油松叶的N、P元素含量比纯林油松叶高12.5%～33.3%,根的N、P元素含量比纯林高34.1%～133.3%,枯落物层的有机质和N、P,K元素含量比纯林高7%～31%,土壤有机质比纯林高3%～39%,混交林有利于提高光能利用率,增加土壤湿度,降低夏季林内过高的温度.油松紫穗槐可以多种方式混交,油松黄栌混交林则以带状混交或块状混交为好.
More than 30 years of commercial practice of Pinus tabulaeformis and Arborvitae mixed forest in Xishan district of Beijing indicated that Amorpha fruticosum and Pterocarya stenoptera are better mixed partners of Pinus tabulaeformis and their mixed forests have obvious advantages over pure forest and the volume per unit area is 36.1% ~ 67.3%. The content of N and P in Pinus tabulaeformis leaves was 12.5% -33.3% higher than pure Pinus tabulaeformis leaves, and the contents of N and P in roots were 34.1% -133.3% higher than those in pure forests. The content of organic matter and N, P, K is 7% ~ 31% higher than that of pure forest, and the content of soil organic matter is 3% ~ 39% higher than that of pure forest. The mixed forest is good for improving the utilization of light energy, increasing the soil moisture and decreasing the excessive forest in summer The temperature of P. oleifera Amorpha can be mixed in a variety of ways, pine is mixed with mixed forest is banded or block mixed as well.