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在广西田阳县开展了封山育林对石灰岩山地植被恢复的影响研究。结果表明:封山3年后石灰岩山地植被恢复明显,2个试验地的物种多样性、重要值及植被覆盖率都发生了不同程度的改变。其中:A试验地的物种数增加了13种,增量达59.09%;重要值降多升少,植物在群落中的地位没有发生根本的改变;植被覆盖率提高了40%。B试验地的物种数增加4种,增量仅为19.05%;在重要值中,木本及藤本植物降多升少,它们在群落中的地位没有发生明显改变,而草本植物则升多降少,部分植物的地位已发生了根本改变;植被覆盖率达到了100%。
Study on the Effect of Closing Hillsides to Facilitate Afforestation on Vegetation Restoration of Limestone Mountain in Tianyang County, Guangxi Province. The results showed that the limestone mountain vegetation recovered obviously after 3 years of mountain closure, and the species diversity, important value and vegetation coverage of the two experimental sites all changed to some extent. Among them, the number of species in experiment A increased by 13 species and the increment reached 59.09%; the importance value increased more and less and the status of plants in the community did not change fundamentally; the vegetation coverage rate increased by 40%. The number of species in B increased by 4, with an increment of only 19.05%. In important values, woody and lianas decreased more and more, their positions in the community did not change significantly, while those of herbaceous plants increased or decreased Fewer, the status of some plants has undergone fundamental changes; the vegetation coverage rate reached 100%.