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In the restoration process of limestone mountain ecosystem, the interaction mechanism, between vegetation and soil are the core scientific issues for a better understanding of ecological restoration and ecosystem stability. Based on this, four types of 30 year old artificial forest communities with different coniferous and broad-leaved mixed ratios (0-20 %, 20 - 50 %, 50 – 80 %, 80 – 100 %) in typical limestone mountainous areas of the northern subtropical region are used as research objects to measure understory vegetation diversity, litter, and fine root characteristics. The impact of different mixing ratios on understory vegetation restoration and soil systems is explored.、The results show that there are significant differences in the litter fall stock, water capacity, annual decomposition rate, nutrient change rate, stoichiometric ratio, and fine root biomass of litter among different mixed proportion stands. As the proportion of mixed coniferous trees increases, the standing litter and annual yield both decrease. Therefore, one of the effective measures for the restoration and improvement of fragile ecosystems in limestone mountainous areas is to create mixed forests or carry out forest transformation according to a moderate mixed proportion.
Zhang et al. (Mon,) studied this question.