Study on Ecological Stoichiometry Characteristics and Correlation of Plants within Different Organs of 10 Dominant Tree Species in Karst Region of Central Guizhou
Based on the analysis of 10 dominant tree species in Karst region of Guizhou Province, the correlation between carbon (C), nitrogen (N), phosphorus (P) and their organ traits were analyzed. The main results wereas following: average value of N/P in the leaves of plants in the studied area was (9.75+0.55), mainly due to the limitations of N, but Coriaria nepalensis and Alnus cremastogyne were not restricted by the lack of N because they were the nitrogen fixing plants. The content of C, C/N, C/P value showed the order in various growth forms as following: evergreen species>deciduous species and coniferous species>broadleaf species and non-nitrogen fixing species>nitrogen fixing species; N and P content: evergreen species <deciduous species and conifer species<broadleaf species and non-nitrogen fixing<nitrogen fixing plant. The distribution pattern of nutrient content of all organs: total C content was leaf>stem>root, while total N and total P content were leaf>root>stem. There was a significant positive correlation between N and P (P<0.05) in all plant organs, which showed the synergistic effect of N and P nutrient elements. There was a positive correlation between plant leaves and roots, stems and roots, as well as the same elements in stems and leaves (P<0.05). C, C/N, and C/P ratio showed positive correlation in leaves, roots and stems, which explained N and P played an important role on plant growth and accumulation of organic.
国家科技期刊平台
NSTL
万方数据
维普
