The N,P cycling process in terrestrial ecosystem will change under the global changes and the change will affect the structure and functions of the ecosystem. Smpling belt investigation is an efficient way in research on the responses to global change and the mechanisms of the response. Based on the data from the sampling bel, the Soil Chemistry Group, Ecological Stoichiometry Group and Bio-geo Chemistry Group in our institute jointly analyzed above-ground and below-ground N,P content of dominant plants( Genus Stipa, Cleistogenes and agropyron )and the effect of climate and soil factors on the distribution. It was found that 1) Annual precipitation affects element distribution in C3 Plant and annual temperature affects C4 plants. 2) From west to East, along with the increase in precipitation and decrease in temperature,the N, P content gradually decrease and the N, P content in plant is negatively correlated to the available N,P content in soil. 3) The N/P ratio is quite stable along the belt. 4)The above ground and below-ground N content meet with allometric growth model and P content meet the constant growth model. The results were published in Global Biochemical Cycles.

Luo WT, Elser JJ, Lü XT, Wang ZW, Bai E, Yan CF, Wang C, Li MH, Zimmermann NE, Xu ZW, Li H, Wu YN, Jiang Y*. 2015. Plant nutrients do not covary with soil nutrients under changing climatic conditions. Global Biogeochemical Cycles, Doi: 10.1002/2015GB005089 (IF: 3.965)。