Abstract: Ten-years studies on litterfall amount and its seasonal and annual dynamics at Xiaoliang tropical artificial mixed plantation show that the annual average amount of small litterfall was 5.539t·hm^-2 .Its seasonal variation occurred obviously, with a peak in wet July.As the development of the plantation, the annual amount of litterfall was getting stable gradually.The storage of litterfall layer was 4.9t·hm^-2, less than the annual litterfall, indicating that the decomposition rate was greater than accumulation rate.The existence of forest litterfall could lower temperature, raise relative humidity, reduce runoff and soil erosion, improve soil fertility, and increase biodiversity of soil animals.

Key words: Xiaoliang, Tropical artificial mixed plantation, Litterfall, Ecological effects