Abstract:

Taking experimental and mathematical statistics method, the soil organic matter content (SOM) and relevance between SOM and other soil fertility factors were comparative analysis. The result showed that the influence of different vegetation and different restoration patterns on SOM content are different, the relevance of vegetation types and SOM content is extremely significant. Native species play a very important role in eco-restoration of karst rocky desertification. The SOM content of the plots which dominant species is Pteroceltis tatarinowii are obviously higher than that of the primeval forest and any other plots. The SOM content of other native trees, such as Platycladus orientalis, Zenia insignis, Cyclobalanopsis glauca, Vitex negundo, etc. plots are higher than that of the alien species, such as Pinus eliottii, Eucalyptus robusta plots. With the recover time increase, the SOM content also has the increase trend. But, after 50 years, the SOM content of the primeval forest plots decreased slightly. Base on the analysis related, some suggestion, such as rational allocating species, pay attention to local plants, full account of eco-economic benefits in karst rocky desertification management, etc. were put forward by the authors.