The relationship of the main populations in the community of protection forests was mainly negative association . The species-pairs with positive inter-specific relationship were very rare.
防护林群落主要种群之间的关系以显著性负相关关系为主，种间关系为正关联的种对极少，主要种群之间竞争激烈，人工林主要种群之间的竞争比天然林的种间竞争激烈。
The relationship of the main populations in the community of protection forests was mainly negative association . The species-pairs with positive inter-specific relationship were very rare.
防护林群落主要种群之间的关系以显著性负相关关系为主，种间关系为正关联的种对极少，主要种群之间竞争激烈，人工林主要种群之间的竞争比天然林的种间竞争激烈。
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