Distribution of Fine Root Biomass and its Morphologic Features in Chinese Fir Plantation
Soil coring was used to investigate the biomass and morphologic features of the mm and 1 -2 mm in diameter of 0 - 80 cm soil layer for Chinese fir plantation in Sanming roots ≤ 1 , Fujian. The results showed that： the biomass of the roots ≤ 1 mm in diameter for Chinese fir and understory vegetation was 191.1 g/m^2, 32. 83 g/m^2 respectively, the biomass of the roots 1 -2 mm in diameter was 207.5 g/m^2, 10. 86 g/m^2 respectively ; the root length of the roots ≤ 1 mm in diameter for Chinese fir and understory vegetation was 5 059.67 m/m^2, 1 076. 27 In,/m^2 respectively, the root length of the roots 1 - 2 mm in diameter was 962. 87 m/m^2, 52. 23 m/m^2 respectively ; the surface area of the roots ≤1 mm in diameter for Chinese fir and understory vegetation was 24. 62 m^2/m^2, 3.41 m^2/m^2 respectively, the surface area of the roots 1 - 2 mm in diameter was 3.39 m^2/m^2, 0. 15 m^2/m^2 respec-tively. The proportion of biomass, root length and surface area accounted for the total of the roots ≤ 1 mm in diameter for understory vegetation was far above Chinese fir. As for the specific root length of the roots ≤ 1 mm, Chinese fir was greater than understory vegetation, for the tissue density, understo- ry vegetation was greater than Chinese fir; for the specific root length of the roots 1 - 2 ram, Chinese fir was slightly less than understory vegetation, for the tissue density understory vegetation was greater than Chinese fir. The vertical distribution of fine root biomass for Chinese fir and understory vegetation decrease with soil depth ; the vertical distribution of fine root length and surface area were not obvious, but all represent that the surface soil was greater than subsoil. The proportion of biomass, root length,surface area of each soil layer showed ： Chinese fir was greater than understory vegetation. The propor- tion of biomass, root length and surface area of the roots ≤ 1 mm in diameter accounting for the total in 0 - 10 cm soil layer showed that understory vegetation was greater than Chinese fir.
Chinese fir plantationbiomassroot lengthsurface areavertical distribution
NETL
NSTL
万方数据
维普
