Forest litter,soil characteristics and water conservation function of typical forest in Zhalantun,Inner Mongolia

Three kinds of typical different density level forest( Xingan natural larch,natural birch,artificial xingan Larch) of water conservation function were studied by the analysis of different forest types of forest litter and soil hydrological properties. The results show that forest litter accumulation is 24. 81 ~ 82. 32t/hm2,natural forest litter reserves are significantly higher than artificial forest. Natural Betula platyphylla forest litter water-holding capacity is the largest( 270. 25t/hm2),artificial pure larch forest is the minimum( 88. 25t/hm2). Litter effective retaining content on water shows natural deciduous forest( 122. 36t/hm2) natural birch forests( 94.49t/hm2) artificial larch forests( 67. 99 t/hm2). The maximum capacity of soil moisture is 2958. 51 ~3723. 39t/hm2. Total porosity and maximum water holding capacity show natural forest natural forest birch larch plantation. Effective soil water holding capacity shows natural birch forests( 1033. 23t/hm2) natural deciduous forest( 946. 37t/hm2) artificial larch forests( 833. 34 t/hm2). When the natural forest and artificial larch forest canopy density are above 85%,or the natural Betula platyphylla forest canopy density is below 55%,the litter amount and the maximum water holding capacities are the largest. When natural larch forest canopy density is 65. 2 ~ 67%,natural Betula platyphylla forest canopy density is 40. 07 ~ 54. 52%,artificial larch forest canopy density is 85. 66 ~ 100%,Litter on water interception amounts are the largest. When the natural larch forest canopy density is 73. 49 ~ 96%,the natural Betula platyphylla forest canopy density is 56. 07 ~65. 37%,or the artificial larch forest canopy density is 46. 72 ~ 67. 29%,effective soil water holding capacities are the largest.