随着林业生产的不断发展、物种丰富的天然群落日渐被少数单一树种的人工林所代替。由于造林常以针叶树种为主,在皖南国营林场和乡村林场大多营造杉木、松树等针叶树种,不仅给林地生态环境带来一些负效应,也使林业本身的经济效益受到抑制和影响。如森林的生 With the continuous development of forestry, species-rich natural communities are gradually replaced by a few single species of plantations. Because conifers are mostly used for afforestation, conifers such as Chinese fir and pine trees are mostly built in southern Anhui state-owned forest farms and rural forest farms, which not only bring some negative effects to the ecological environment of forests, but also restrain and influence the economic benefits of forestry itself. Such as the forest’s students