The Characteristics And Heterogeneities Of Soil-plant System Of Rock Slope Topography In Mt.Laotudingzi Of Liaoning Easten Mountains

Mt.Laotudingzi in Liaoning Eastern Mountains was widely distributed periglacial landform of rock slope field.Its unique design of the soil-plant system is hlepfull to stabilize of the entire environment and playing an important role on regulation.Based on this,the study put forest communities of periglacial landforms of Mt Laotudingzi as the study area,based on 17 sample area's community survey datum,the characteristics and heterogeneities of soil-plant system of rock slope topography in Mt Laotudingzi was studied,and the mutual influence of forest communities in soil-plant system is analysised quantitatively,the main conclusion is that:(1)The 13 forest association of the rock slope Periglacial Landform could be divided into 7 forest formations 3 vegetationtypes(including broad leaved deciduous forest?heropencedrymion?elfin wood);4 brush association incorporated into a vegetation type.(2)The crown density of periglacial landforms of rock slope of broad leaved deciduous forest,theropencedrymion,elfin wood and bush fallow are 0.8,The species richness are respectively 33?36?42,Shannon-wiener index are respectively 1.4?1.5?1.5,The hight of tree layer are respectively 10.9?12.0?5.4 m,Diameter at breast height are respectively 17.6?16.6?9.6 cm,The crown are respectively 6.0?5.9?4.2 m,The species of brush is 33,Shannon-wiener index is 1.8,The hight of shrub layer is 151.1 cm,Base diameter is 2.0 cm,The crown is 85.5 cm,The coverage of herb layer is 99.6%,The hight is 51.0cm.In the forest communities the proportion of phanerophyte is 24.1%?61.8%,chamaephytes are rare,the proportion of hemicryptophyte is 11.8%?31.1%,the proportion of cryptophyte is 7.9?39.4%,the proportion of annual plants is 2.3%?6.9%.(3)Litter amount in fores communities of periglacial landforms of rock slope of broad leaved deciduous forest,theropencedrymion,elfin wood bush fallow and brush are 14.212.1?12.8?3.4 t/hm2,coefficient of variation are 26.8%-46.3%.The litter layer thickness are 7.3?6.4?4.0?1.4 cm.coefficient of variation are 34.8%-90.8%.(4)The thickness of soil layer of periglacial landforms of rock slope of broad leaved deciduous forest,theropencedrymion,elfin wood bush fallow and brush are 15.0-82.5cm,coefficient of variation are 30.3%-78.3%;soil pH are 4.0-4.7,coefficient of variation are5.6%-9.4%;soil electrical conductivity are 62.2-106.2?s/cm,coefficient of variation are 23.0%-45.9%.The soil contains a variety of oxide,coefficient of variation are 5.8%-35.2%.(5)There is no obvious correlation between litter amount and the basic characteristics of the tree layer and shrub layer,but has a certain relationship with the a nutrient reserves;Litter the relationship between litter nutrient reserves and soil characteristics,soil nutrient content is also very complex.The relationship between litter nutrient reserves,litter amount and the basic characteristics of the herb layer is complex;litter amount and soil characteristics has a certain relationship.There has a certain relationship between tree layer,shrub layer,herb layer and soil properties,soil nutrient content.