关键词: In Huoshan Mountain, sampling plots were set up at Qiliyu Farm for field investigation, trees, shrubs and grasses in 26 species were identified. The leaf area was measured with Li-3000A Leaf Area Meter, and the saturated photosynthetic rate (A_area) was determined with Li-6400 portable photosynthesis system. The leaf mass per area (LMA), The net photosynthesis based on mass (A_mass), leaf nitrogen content per unit area (N_area), leaf nitrogen content per unit mass (N_mass) and photosynthetic nitrogen use efficiency (PNUE) were quantified, the differences and interactions among three plant functional types (PFTs) were studied. The results showed that there were significant differences (p<, 0.05) in N_mass, A_area, A_mass, N_area and PNUE of three PFTs. The photosynthetic characteristics were significantly correlated with leaf nitrogen content, N_mass was significantly correlated with A_area (p<, 0.05), A_mass and PNUE, while N_area was significantly positively correlated with A_area, A_mass and PNUE (p<, 0.01).

Abstract: 功能型；叶氮含量；光饱和光合速率；光合氮利用效率

Key words: plant functional type, leaf nitrogen content, saturated photosynthetic rate, photosynthetic nitrogen use efficiency