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应用方差比率VR、种间联结系数AC及X2检验等方法，对福建卫闽光皮桦林优势种群的种间联结性进行了定量研究，结果表明，在卫闽光皮桦林8个优势种组成的28个种对中，正联结种对有12个，占联结种对总数的42．9％，负联结种对16个，占57．1％。正联结种对中，呈显著正联结种对有3个，占总种对数的10．7％；负联结种对中，是显著负联结种对有1个，占总种对数的3．6％。多数种群间联结性不显著说明卫闽光皮桦林还不成熟，群落结构种和种类组成还不完善和稳定，整个林地仍处于变化和演替中。
The variance ratio VR, interspecific association coefficient AC and X2 test were used to quantitatively study the interspecific association among the dominant populations of Betula luminifera in Fujian Province. The results showed that among 8 dominant species Among the 28 species, 28 were positive, 42.9% were positive, and 16 were negative, accounting for 57.1% of the total. There were 3 positive positive and 2 positive pairs in the positive and negative pairs, accounting for 10.7% of the total species pairs. Negative and negative pairs had 1 negative and 2 negative pairs, accounting for 3 .6%. The non-significant association among most populations indicates that the Betula platyphylla forest in Peimin is not yet mature, the composition and species composition of community structure are not perfect and stable, and the entire forest is still in the process of change and succession.