Stoichiometry Characteristics of Leaves and Soils of Five Dominant Tress Species in Yueliang Mountain of Guizhou
Stoichiometry is a scientific method of studying the balance of chemical elements in ecological interactions and processes,which provides a comprehensive approach for the study of elements in measuring relationship between biogeochemical cycle and the pattern of ecological processes,it is of great significance to reveal the demand of plant nutrition and the ability of soil nutrient supply.The forest ecosystem of the Yuelian Mountain in Guizhou is a non karst forest,which is typical and special in Guizhou Province.This research aimed to study the stoichiometric characteristics of leaves of 5 dominant tree species(Quercus acutis sima,Liquidambar formosana,Schima superba,Pinus massoniana,Cunninghamia lanceolat) in different leaf positions and soils in their communities,which were of great significance for revealing the coupling relationship between vegetation and habitats.Taking the upper,middle and lower leaves of 5 dominant tree species and soils in their communities in the Yueliang Mountain of Guizhou,we analyzed the characteristics of ecological stoichiometry.The results showed that:(1) the average C,N,P contents of 5 dominant species in the Yueliang Mountain were 530.06±34.12 mg/g,14.80±2.35 mg/g and 0.98±0.14 mg/g,respectively,the averages of C ∶ N,C ∶ P,and N ∶ P were 37.95±2.74,572.9±34.5 and 15.93±2.11,respcectively,the average contents of C,N and P in 0-30 cm soil layer was 33.53±3.22 mg/g,10.92±1.52 mg/g and 0.44± 0.08 mg/g,respectively;(2) the contents of C,N and P and stoichiometric ratios of 5 dominant species in the upper,middle and lower layers of tress were not significant,which means the leaf position does not affect C,N and P contents;(3) C,C ∶ N,C ∶ P of tree species were less than the evergreen tree species;(4) in 0-20 cm surface soil,the C,P contents of non karst forest of Yueliang Mountain were much lower than those in the same latitude zone of the karst forest,and the N content was much higher than that in karst forest;However,leaf C,N contents were opposite;(5) correlation analysis showed that soil C,N and P were significantly positively correlated,however leaf C and soil P were not significantly positively correlated.The results can provide the scientific basis for the comparative study of karst and non karst forests in the same latitude zone.
stoichiometryleavessoilYueliang Mountain in Guizhou
国家科技期刊平台
NSTL
万方数据
维普
