Abstract: An investigation on the bryophyte species in typical vegetations in upstream of Chishui river was conducted. The total nitrogen concentration and pedogenic function of Brachythecium plumosum, Entodon dolichocucullatus, Hypnum fujiyamae, Claopodium rugulosifolium and Campylopus subfragilis were studied. The results showed: (1) There are 26 taxa of bryophytes belonging to 18 genera and 14 families and the dominant bryophytes were the mosses; (2) The biomass and pedogenesis amount of these 5 bryophytes crust were 0.40-36.80 and 9.60-249.20 g·m^-2, respectively. The biomass and pedogenesis amount were higher in H.fujiyamae, which has significance in the water and soil loss control; (3) The total nitrogen concentrations of bryophytes and soil were 1.20%-1.87% and 0.07%-0.50%, respectively. The total nitrogen concentration was the highest between H.fujiyamae and soil, and the lowest between C.subfragilis and soil. With the increasing of altitude, the total nitrogen concentration decreased after an initial increase; (4) Correlation analysis showed that the differences in total nitrogen concentration between plant and soil were significant, the total nitrogen concentration in plant was 17.14 times of that in soil, however, the total nitrogen concentration in plant was significantly positively correlated with that in soil. Study on the total nitrogen concentrations of plant and soil lays the foundation for biogeochemical study in this area.

Key words: upstream of Chishui river, typical vegetations, bryophyte crust, pedogenic function, TN concentration