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Citation:

Study on Biomass and Productivity of Picea likiangensis var. linzhiensis Forest in Nanyigou of Tibet

  • Received Date: 2011-10-19
  • Based on the data collected from a standard permanent plot of a primary Picea likiangensis var. linzhiensis forest in Milin Nanyigou in Tibet, the amount and distribution of biomass and productivity were studied by investigating and sample tree harvesting method. The results showed that the total vegetation biomass of P. likiangensis var. linzhiensis forest was 367.49 t·hm-2, of which overstory trees contributed the large proportion (75.28%) and amounted to 276.64 t·hm-2. The litter layer ranked the second with the biomass amount of 40.65 t·hm-2, accounted for 11.06% of the total biomass. In the overstory layer, the biomass was allocated as 201.23 t·hm-2 (69.32%) for trunk, 25.53 t·hm-2 (8.79%) for bark, 17.80 t·hm-2 (6.13%) for branch, 3.33 t·hm-2 (1.15%) for leaf, and 42.87 t·hm-2 (14.61%) for root. With the growth of trees, the biomass proportion of trunk and bark increased, while that of the branch and leaf decreased. The total vegetation productivity was 10.65 t·hm-2·a-1, of which overstory trees contributed a large proportion (46.94%) and amounted to 5.00 t·hm-2·a-1. The litter layer ranked the second with an amount of 3.40 t·hm-2·a-1 that accounted for 31.94% of the total proportion. In the overstory layer, the proportion was allocated as 2.58 t·hm-2·a-1 for trunk, 0.89 t·hm-2·a-1 for branch, 0.67 t·hm-2·a-1 for leaf, 0.54 t·hm-2·a-1 for root and 0.33 t·hm-2·a-1 for bark.
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Study on Biomass and Productivity of Picea likiangensis var. linzhiensis Forest in Nanyigou of Tibet

  • 1. Tibet Agricultural and Animal Husbandry College, Linzhi 860000, Tibet, China

Abstract: Based on the data collected from a standard permanent plot of a primary Picea likiangensis var. linzhiensis forest in Milin Nanyigou in Tibet, the amount and distribution of biomass and productivity were studied by investigating and sample tree harvesting method. The results showed that the total vegetation biomass of P. likiangensis var. linzhiensis forest was 367.49 t·hm-2, of which overstory trees contributed the large proportion (75.28%) and amounted to 276.64 t·hm-2. The litter layer ranked the second with the biomass amount of 40.65 t·hm-2, accounted for 11.06% of the total biomass. In the overstory layer, the biomass was allocated as 201.23 t·hm-2 (69.32%) for trunk, 25.53 t·hm-2 (8.79%) for bark, 17.80 t·hm-2 (6.13%) for branch, 3.33 t·hm-2 (1.15%) for leaf, and 42.87 t·hm-2 (14.61%) for root. With the growth of trees, the biomass proportion of trunk and bark increased, while that of the branch and leaf decreased. The total vegetation productivity was 10.65 t·hm-2·a-1, of which overstory trees contributed a large proportion (46.94%) and amounted to 5.00 t·hm-2·a-1. The litter layer ranked the second with an amount of 3.40 t·hm-2·a-1 that accounted for 31.94% of the total proportion. In the overstory layer, the proportion was allocated as 2.58 t·hm-2·a-1 for trunk, 0.89 t·hm-2·a-1 for branch, 0.67 t·hm-2·a-1 for leaf, 0.54 t·hm-2·a-1 for root and 0.33 t·hm-2·a-1 for bark.

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