Soil Hydrological Properties of Four Hardwood Forest Types along SongHua River Trunk

Through field investigation and experiment analysis,the soil hydrological properties of four hardwood forest types are studied.It is shown that:(1) The total litter stocks of four forest types range from 25.88 to 48.81 t hm-2,in which the decline order is Tilia mandshurica secondary forest,Juglans mandshurica mixed forest,Populus davidiana and Fraxinus mandshurica forest,and Quercus mongolica secondary forest.The decline order of the maximal water-holding amount is Tilia mandshurica secondary forest,Populus davidiana and Fraxinus mandshurica forest,Juglans mandshurica mixed forest and Quercus mongolica secondary forest;(2) Average organic matter contents of four forest types range from 55.54 to 90.59 g kg-1,in which the decline order is Populus davidiana and Fraxinus mandshurica forest,Tilia mandshurica secondary forest,Juglans mandshurica mixed forest and Quercus mongolica secondary forest;(3) The maximal soil water-holding capacity is from 2693.50 to 3184.31 t hm-2,in which the decline order is Populus davidiana and Fraxinus mandshurica forest,Tilia mandshurica secondary forest,Juglans mandshurica mixed forest and Quercus mongolica secondary forest;(4) All the average soil infiltration indexes of four forest types are below 9 mm min-1,and the soil infiltration ability of the Tilia mandshurica secondary forest is the best in all the four forest types;(5) Considering from the water-holding capacity of the litter,the water-holding capacity and infiltration characteristics of the soil,soil hydrological properties of four forest types are evaluated and the decline order is Populus davidiana and Fraxinus mandshurica forest,Tilia mandshurica secondary forest,Juglans mandshurica mixed forest and Quercus mongolica secondary forest.