Liu S.,Fujian Agriculture and forestry University |
Liu S.,Chinese Fir Engineering Technology Research Center |
Lin K.,Fujian Agriculture and forestry University |
Lin K.,Chinese Fir Engineering Technology Research Center |
And 12 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2015
To detect the population characteristics of dominant species in the Chinese fir ecosystem under long time near-natural restoration, the method of contiguous grid quadrants was applied to conduct comprehensive analysis on the population structure and spatial pattern of the dominant species in a 75 a old-growth Chinese fir community at the Xiqin Teaching Forest of Nanping, Fujian Province. The results showed that the community of Schima superba, Castanopsis fargesii and Machilus pauhoi was generally in an inverse "J" shape, and the population belonged to growing group. The community of Cunninghamia lanceolata and Eurya nitida was in the "J" shape, and the population belonged to recessing group. In the population level, S. superba and E. nitida were distributed in a clumped pattern, M. pauhoi and C. fargesii populations in a random pattern, and C. lanceolata in an even pattern. The clump intensity was in an order of E. nitida > S. superba > M. pauhoi > C. fargesii > C. lanceolata. Among them S. Superba showed a random pattern at age V but a clumped pattern at the other four ages; M. Pauhoi and C. fargesii of all ages showed a clumped pattern; E. Nitida showed a clumped pattern at age I and II, a random pattern at age III, but a even distribution patter at age IV. Besides, the diffusion coefficient of E. Nitida and C. lanceolata increased with the diameter. The old-growth Chinese fir communities are in a transition phase proceeding to zonal evergreen broad-leaved forest succession. In conclusion, near-natural restoration effectively enriches vegetation types of old-growth Chinese fir communities. S. superba, C. fargesii, and M. pauhoi should be given priority in restoration and reconstruction of degraded ecosystem of Chinese fir plantations. © 2015, Science Press. All rights reserved.
Wei X.,Fujian Agriculture and forestry University |
Wei X.,Chinese Fir Engineering Technology Research Center |
Chen A.,Chinese Fir Engineering Technology Research Center |
Chen A.,Fujian Agriculture and forestry University |
And 8 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2016
Biolog-ECO technology was used to investigate the change of soil microbial community. The soil microbial community functional diversity indexes, kinetics of total carbon source utilization and physical-chemical properties were analyzed in successive rotation plantations of Chinese fir (FCF, SCF and TCF) and Phoeba bournei plantation (PBP, CK) based on physical-chemical properties of the soil. The results showed that soil microbial richness (Shannon index), dominance (Simpson index), uniformity (McIntosh index) had reached a significant difference in 4 forest stands; the soil microorganism overall activity (AWCD), Shannon index, Simpson index, McIntosh index values in Phoeba bournei plantation were higher than other three forest types; The correlation of soil microbial biomass C, N, Shannon index, Simpson index with AWCD value had reached a significant level. The order of values in AWCD, soil pH, total C, N, soil microbial biomass C, N as follows: PBP > FCF > SCF > TCF. The conclusion was that the overall activity of soil microbial community as well as soil pH, total C, N, soil microbial biomass C, N content were declined with the increasing continuous plantations of Chinese fir.