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封山育林能使生态环境得以自然恢复，投资少见效快，在林业建设中可以收到事半功倍的效果。本文根据样线技术以及样方外业调查的结果，分析了晋东南石灰岩山地封禁区植被及生物量的自然恢复情况，以重要值的大小来衡量分析出各个坡向植物群落中起主要作用的树种，探索石灰岩山地植物群落演替规律。结果表明：经过１０ａ的封禁，区域植被总的覆被率达０．７５，生物量达４０８４．７１～１０７６７．７６ｋｇ／ｈｍ￣２，使封禁区由一个简单生态系统恢复成为一个较为复杂的生态系统。
Closing hillsides for afforestation can make the ecological environment be restored naturally, investment is quick and infrequent, and can achieve a multiplier effect in forestry construction. This paper analyzes the natural restoration of vegetation and biomass in the closed area of limestone mountainous area in southeastern Shanxi based on the sample line technology and the results of the quadrats field survey. The importance of the value of the important plant species Tree species, to explore the succession of plant community in limestone mountainous area. The results showed that after the closure of 10a, the total coverage rate of regional vegetation reached 0.75 and the biomass reached 4084.71 ~ 10767.76kg / hm ~ 2, making the closed area recover from a simple ecosystem to a more complex ecosystem system.