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中文摘要：
外来植物薇甘菊（Mikania micrantha H．B．K．）已入侵华南许多地区，并造成严重危害。探讨了外来植物薇甘菊凋落物对4种本地植物大叶榕（Ficus virens）、潺槁树（Litsea glutinosa）、樟树（Cinnamomum camphora）和台湾相思（Acacia confusa）凋落物分解的影响。凋落物分解采用网袋法，将薇甘菊凋落物分别与本地植物凋落物按3个比例混合，3个比例为，m（薇甘菊）：m（本地植物）=M1（1：4），M2（1：1）和M3（4：1）。分解60d后，测定凋落物的分解速率与养分释放。结果表明，薇甘菊与本地植物凋落物混合比例为M1时，凋落物分解速率变慢，但在M3时，凋落物的分解速率变快。与单独本地凋落物养分释放相比，薇甘菊凋落物混入后C释放有所下降，而N素释放量有所提高，这种N释放量的增加可能会对薇甘菊的入侵产生正反馈作用。
英文摘要：
The exotic plant Mikania micrantha H. B. K. has invaded many forests in south China and caused a great damage. The effect of Mikania micrantha invasion on litter decomposition of native plants was studied. The litterbag technique was used to quantify the litter decomposition rate. Litter of the invasive plant Mikania micrantha was mixed with the litter of 4 native plants （Ficus virens, Litsea glutinosa, Cinnamomum camphora, Acacia con- fuse） respectively as 3 ratios： M1 （ 1： 4）, M2 （ 1： 1 ） and M3 （4：1 ）. After 60-days decay, the litter decomposition rate and nutrient （C, N） release were determined. The results showed that under M1, the mixed litter decomposition rate decreased, while, under M3, the mixed litter decomposition rate increased. In addition, C released from the mixed litter decreased, while N release increased, and N released the most under M3. The increased N release might represent positive feedback to Mikania micrantha invasion.
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