Soil And Litter Characteristics Of Typical Plant Community In Shanggaotai Forest Farm

Soil is the basis of plants,soil fertility can directly affect the growth and development of plants.The litter is an important part of the ecosystem.It releases the accumulated nutrients into the soil and is again absorbed by the plants.Most of the nutrients absorbed by the plant roots(N,P,K mineral elements,etc.)come from the dead litter.Shanggaotai Forest Farm is located at the eastern end of Daqingshan National Nature Reserve in Inner Mongolia.As one of the areas where biodiversity is directly disturbed by human concentration,how to promote vegetation recovery and development through human means is of great significance to increase the biodiversity of the protected reserve.In this thesis,the soil and litter characteristics of 7 typical plant communities in Shanggaotai Forest Farm were analyzed by field investigation,laboratory experiment and analysis,in order to provide theoretical basis for effective evaluation and utilization of land,scientific management and sustainable development.The main research results are as follows:(1)The average nutrient content of organic matter,whole nitrogen,whole phosphorus and whole potassium of arbor community,Larix Principis-rupprechtii Mayr community and Betula Platy Hylla Suk community is 83.19g/kg,4.04g/kg,0.91g/kg,27.32g/kg and 77.26g/kg,3.46g/kg,6.73g/kg,23.66g/kg,respectively,all manifested as Larix Principis-rupprechtii Mayr community>Betula Platy Hylla Suk community.The average content of fast-acting nutrients is 20.06mg/kg,4.75mg/kg,246.32mg/kg and23.67mg/kg,20mg/kg,273.67mg/kg,all manifested as Betula Platy Hylla Suk community>Larix Principis-rupprechtii Mayr community.The p H of Larix Principis-rupprechtii Mayr community is 6.4 and Betula Platy Hylla Suk community is6.9;the organic,whole nitrogen,phosphorus and quick acting nitrogen are 43.6g/kg,2.23g/kg,0.89g/kg,17.53mg/kg and 32.69g/kg,2.13g/kg,24.02g/kg,14.34mg/kg,respectively,all manifested as Ostryopsis davidiana community>Prunus Pdeunc-ulata community;handle tonsil community.The average content of total potassium,quick phosphorus and quick potassium are 22.7g/kg,4.57mg/kg,162.5mg/kg and 24.02g/kg,6.43mg/kg,198.05mg/kg,respectively,showing Prunus Pdeunc-ulata community>Ostryopsis davidiana community;The p H of Ostryopsis davidiana community is 7.6,Prunus Pdeunc-ulata community is 8;Herbaceous community,Average content of organic matter and total nitrogen in protective grassland community and grazing grassland community and rocky slope grassland community are 78.52g/kg,4.37g/kg,67.33g/kg and 3.26g/kg,63.41g/kg and 3.23g/kg,respectively All represented in protected grass communities>Grazing Grass Community>Stone slope grassland community,Atotal phosphorus is 0.8g/kg,0.93g/kg,0.98g/kg,Performance as rocky slope grassland community>Grazing Grass Community>Protective grassland communities,The average content of full potassium,fast-acting nitrogen and fast-acting potassium is 26.39g/kg,14.34mg/kg,211.64mg/kg;25.42g/kg,13.37mg/kg,164.63mg/kg;33.77g/kg,15.66mg/kg,305.51mg/kg,Performance as rocky slope grassland community>Conservation grass community>Ggrazing grass communities,Fast-acting phosphorus content and p H value protective grass community and grazing grass community,3.6mg/kg,6.8 and 3.63mg/kg,6.8,respectively Fast-acting phosphorus and p H values are large,For the 5.4mg/kg,7.4.(2)The nutrient mass index of the 7 typical plant communities ranges from 0.203-0.361,the highest is Betula platyp Hylla Suk.community and the lowest is prunus Pedunc-ulata community.The specific sorting results are:Betula Platy Hylla Suk community>Larix Principis-rupprechtii Mayr community>protective grass community>stone slope grass community>grazing grass community>Ostryopsis davidiana community>Prunus Pdeunc-ulata community.(3)The extant of dead objects of the 7 typical plant communities ranges from0.69t/hm~2-43.3t/hm~2,the highest is Larix principis-rupprechtii Mayr community and the lowest is Ostryopsis davidiana Decne Community.The specific sorting results are:Larix Principis-rupprechtii Mayr community>protective grassland community>Betula Platy Hylla Suk community>grazing grassland community>slope grassland community>Prunus Pdeunc-ulata community>Ostryopsis davidiana community.