[Effects of combined nitrogen and phosphorus addition on fine root traits of young forest].

Both nitrogen (N) and phosphorus (P) are the main limiting elements for plant growth in terrestrial ecosystems. Fine roots play a critical role in plant growth. To reveal the effects of combined N and P addition on fine root traits of , we performed a field N and P addition experiment in the midmonth from April to September in 2016 and 2017 in a 3-year forest (N and P supply ratios were 8:1, 10:1, 12:1, 15:1).

[Effects of short-term combined application of ammonium nitrogen and nitrate nitrogen on the growth and leaf traits of seedlings].

Trees are characterized with selective absorption of different forms of nitrogen. Ammonium nitrogen (NH-N) and nitrate nitrogen (NO-N) are the main forms of nitrogen for plant absorption. We examined the differences of absorption between NH-N and NO-N for 1-year-old seedlings planted in local hilly red soil in a pot experiment.

[Stoichiometry of carbon, nitrogen and phosphorus and their allometric relationship between leaves and fine roots of three functional tree seedlings.].

We analyzed the contents and stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) in leaves and fine roots of (an evergreen broad-leaved species), (a deciduous broad-leaved species) and (an evergreen coniferous species) to compare the leaf and root stoichiometry and allometric relationship between different functional groups of trees. There were significant difference in the contents and stoichiometry of C, N and P in the leaves and fine roots among different functional groups. C content, C/N and C/P of the leaves and roots were the highest in .

[Relationship between the main functional traits of fine root and the rhizosphere soil nutrients of different diameter classes in Zenia insignis plantation.].

Fine roots are sensitive to changes in the soil environment, and play an important role in plant growth and development. To clarify the relationship between fine root traits and rhizosphere soil nutrient characteristics, fine roots of trees belonging to different diameter classes in six-year-old Zenia insignis plantation were sampled. The results showed that root biomass, root length density and root volume density increased with the increases of diameter class.

[Characteristics of leaf carbon, nitrogen and phosphorus stoichiometry in relation to plant size of Machilus pauhoi].

To explore the effects of stand age on variation patterns of leaf C, N, P stoichiometric characteristics of Machilus pauhoi, two stands, i.e., 9 and 13 years old, were selected.

[Effects of PreS2 synthetic peptides on infiltrating T lymphocyte subgroups expression in hepatocellular carcinoma].

Objectives: To explore whether PreS2 can change the percentage of T lymphocyte subgroups and the ration of CD4+/CD8+ in hepatocellular carcinoma (HCC) caused by HBV.

Methods: The P120-146 region composed by the way of Merrifield, which was the most intensive antigen in PreS2 peptides, served as the antigen after dissolved in 0.01 mol/L PBS.