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本文应用2×2联列表和x~2统计量,对马尾松次生林下木本植物群落种间联结进行了测定。结果表明,在这种群落中,有正联结、负联结和相对独立3种类型的生态植物种对。其中正联结占48.95％,负联结占45.35％,相对独立的占5.71％。并且认为,在当地环境条件下,马尾松次生林下进行种间联结测定的适宜样方面积为5×5平方米。
In this paper, 2 × 2 couplets and x ~ 2 statistics were used to determine the interspecific association of woody communities in the secondary forest of Pinus massoniana. The results showed that in this community, there are three kinds of ecological plant species, being positively linked, negatively linked and relatively independent. Among them, 48.95% are positive, 45.35% are negative, and 5.71% are relatively independent. It is also considered that the suitable plot area for interspecific association under the secondary environment of Pinus massoniana under the local environmental conditions is 5 × 5 square meters.