Research Progress of Ecological Stoichiometry of C, N, P in Xizang
From the point of view of ecosystem energy and elemental balance, eco-chemometrics reveals the biogeochemical cycle of elements and the mechanism by which ecosystems regulate environmental change. This paper summarizes the recent achievements in ecological chemistry measurement of plants, litter, soil and soil microorganisms C, N, P and their response to environmental change in Xizang, and puts forward the future research direction. The results show that the plant-litter-soil-microbe system C, N and P in plant litter has a strong correlation and is significantly influenced by biological factors, abiotic factors and human activities. Plant growth is mainly restricted by N element, N content is higher when C and P are in extreme decline, and plants show strong competitiveness and high internal stability through self-regulating ability. Soil nutrients show a certain"surface aggregation"effect. Under the influence of altitude and temperature, microbial decomposition rate of lit-ter decreases, which may explain the poor soil fertility in high elevation areas. The research on ecological stoichiometry of plant litter soil mi-crobial system can be conducted in long-term, multi factor interactive control experiments at multiple scales and different ecosystems in the fu-ture.
万方数据
维普
