The Study On Lawn Root System Growth Dynamics And Influence Factors In Shen-Dong Mining Area

The Sheng-Dong mining area is the main coal production area in China, this area simultaneously also is the ecology frail area. Contradictory question which for the better solution local resources use and the ecology restore, this experiment through to the surface subsidence influence lawn plant community, the lawn plant use water scope, the lawn plant underground biomass seasonal dynamics, the influence underground biomass factor and so on several aspect research, Identify the impact of changes in the local environment factors..Draws the conclusion through the data analysis: The surface subsidence causes community fluctuations, the community resistance is increased because of the soil moisture content enhances; The influence roots biomass most primary factor is surface subsidence, the surface subsidence causes the soil moisture content and the soil bulk density change, further has the influence to the roots biomass; The roots biomass and the soil level and the soil moisture content assume the inverse correlation, is being connected with the soil bulk density; Collapse area shallow-root plant gets the advantage, the plant mainly use the 0-30cm shallow layer water, has not mined the area deep root plant to get the advantage, the plant mainly to use 30-70cm depth water.; Enters the rainy season has not mined the area not the moisture content limit,the root system massive growth, in the community Artemisia scoparia Waldst. et Kit. and Cleistogenes squarrosa(Trin.)Kengthe important value increases to cause the roots biomass rise; The soil bulk density gravity increases suppresses the deep roots plant growth, also forms the aquiclude in soil bulk density biggest place.