Litter Falls of 6 Major Forest Stands in Maoershan Mountain of Heilongjiang Province

The annual litter fall production,composition and decomposition of the litter fall of six typical forest stands in Maoershan,Heilongjiang Province were studied in this paper.The results are as follows:(1) the annual litter production is in the sequence of Pinus koraiensis(5.62 t·hm-2),Fraxinus mandshurica(5.57 t·hm-2),Pinus sylvestris(5.56 t·hm-2),Quercus mongolica(4.31 t·hm-2),Populus davidiana(4.27 t·hm-2),Larix gmelinii(4.08 t·hm-2);(2) the litter production of leaves of six forests occupies a higher percentage in the annual total litter production than that of other components;(3) decomposition rates of leaf litter falls in the six forests are Fraxinus mandshurica Pinus sylvestris Larix gmelinii Populus davidiana Quercus mongolica Pinus koraiensis.The simulated time spans for 95% weight loss of litter falls in Fraxinus mandshurica,Quercus mongolica,Populus davidiana,Larix gmelinii,Pinus koraiensis,Pinus sylvestris stands are 3.5,8.0,6.7,6.6,8.8 and 4.4 years,respectively.