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研究表明，人工杉木林地土壤有机物和养分库严重退化，地表枯枝落叶层中干物质和各种养分的贮量与阔叶林和混交林比较明显下降，土壤中有机质、全Ｎ量和碱解Ｎ含量的剖面分布也表现出相同的趋势。传统的炼山造林使杉木林地枯枝落叶和养分库呈突变形式退化，林份组成单一，凋落物数量和养分含量少也是杉木林土壤有机物和养分库退化的重要因素。通过改进林木更新方式和改善林份组成可以在很大程度上控制人工林有机物和养分库的退化。
The results showed that the soil organic matter and nutrient pool degraded seriously in Artificial Cunninghamia lanceolate plantation, and the dry matter and nutrient contents in the litter layer decreased obviously compared with those in broad-leaved and mixed forests. The contents of organic matter, total N and alkali-soluble The distribution of N content also shows the same trend. Traditional smelting and afforestation degenerated the litter and nutrient pool of Chinese fir plantations. Single forest composition, small litter quantity and nutrient content were also important factors for the degradation of soil organic matter and nutrient pool in Chinese fir plantations. The degradation of plantation organic matter and nutrient pool can be controlled to a great extent by improving the forest regeneration method and improving the forest composition.