Leaf-Litter-Soil Eco-stoichiometric Relationship Of Different Forest Types In Xianren Cave,Liaoning

The Xianrendong National Nature Reserve in Liaoning is located in the transition zone between the flora of North China and the flora of Changbai.Studying the leaf-litter-soil eco-stoichiometric characteristics of typical forest vegetation in this region can provide an in-depth discussion on the transition zone The nutrient cycling mechanism of the forest community lays the foundation.Based on this,this paper takes the leaf-litter-soil of dark coniferous forest,coniferous and broad-leaved mixed forest,and deciduous broad-leaved forest,typical forest vegetation in Xianrendong,Liaoning as the research object.Systematic research on measurement characteristics and relationships.Research indicates:(1)From the perspective of leaves of different forest types,the average range of C element content in dark coniferous forests ranges from 0.34% to 12.69%,N element from 0.02% to 0.24%,P element from 0.01% to 0.03%,and C: N It is 11.37-52.44,C: P is 193.23-534.17,N: P is 8.52-18.50;Coniferous and broad-leaved mixed forest C element is 0.12%-18.25%,N element 0.01%-0.60%,P element 0.01%-0.05%,C: N is 8.77-46.77,C: P is 67.12-398.70,N: P is 1.44-17.19;deciduous broad-leaved forest C element is 1.25%-15.13%,N element is 0.05%-0.73%,P The elements are 0.01%-0.06%,C: N is 19.06-29.53,C: P is 246.80-338.60,N: P is 10.89-13.81.The leaves of three forest types N: P are all less than 14,indicating that the plant leaves in the study area Growth and development are mainly limited by the content of N element.(2)From the perspective of litter from different forest types,the range of C element in dark coniferous forest is 10.03%-26.63%,N element is 0.40%-1.50%,P element is 0.02%-0.05%,C: N is 17.99-64.04,C: P is 264.45-1526.10,N: P is 14.70-24.73;Conifer and broad-leaved mixed forest C element is 11.54%-26.20%,N element is 0.49%-1.21%,P element is 0.02%-0.08%,C: N is 13.54-53.32,C: P is 238.93-1163.50,N: P is 12.121-21.82;deciduous broad-leaved forest C element is 10.68%-25.95%,N element is 0.57%-1.12%,P element is 0.03%-0.07%,C: N is 12.73-45.34,C: P is 185.34-966.83,N: P is 14.56-22.56.Litter nutrient return is affected by C: N,and dark coniferous forests have the highest C: N,indicating that the dark coniferous forest litter decomposition rate is slow,which is more suitable for storing nutrients and conserving water sources.(3)From different forest types,the range of C element in dark coniferous forest is 2.05%-4.76%,N element is 0.45%-0.77%,P element is 0.03%-0.07%,C:N is 4.35-6.18,C:P is 41.37-92.67,N:P is 6.99-16.14;C in the broad-leaved mixed forest is 1.66%-4.77%,N is 0.32%-0.81%,P is 0.02%-0.13%,C:N is 4.27-6.44,C:P is 36.07-114.52,N: P is 5.87-21.02;deciduous broad-leaved forest C element is 1.99%-3.37%,N element is 0.43%-0.62%,P element is 0.03%-0.05%,C:N is 4.29-6.33,C:P is 60.71-98.21,N:P is 11.72-18.27.Soil nutrient cycling is affected by C:N and C:P,and dark coniferous forest soils have the lowest C:N and C:P,indicating that dark coniferous forest soils have higher available nitrogen and available phosphorus.(4)The analysis results of the leaf-litter-soil eco-stoichiometric relationship of different forest types show that there are significant correlations between shrub leaves and litter,shrub leaves and soil,reflecting shrub leaves and litter and The nutrient circulation rate between shrub leaves and soil is faster,which can provide more nutrients for soil and plant growth and development.