Abstract:

This paper deals with the biomass and production of roots,stems,foliages and branches of Tapiscia sinensis in the seedling and its forest. We have investigated the allocation of the biomass and energy in T. sinensis forest. The biomass dynamics of grass is determined by periodical harvest method, the model tree method to the biomass of forest and the CA-3 type calorimeter to the plants caloric values.

(1)The biomass of one-year old seedling sheltered from the sun with traditional is 1777.5g/ha. The biomass of seedlings sheltered by one layer of plastic sheeting from the sun is heaviest, that in full time illumination is second and that sheltered by three layers of plastic sheeting is lightest.

(2)The biomass of the above-ground part of naturally regenerated T. sinensis individual of 16 years old is 107.77kg.

(3)The total biomass of artificial T. sinensis forests of 8 years old and their mean net production of arborous layer are 80.63t/ha and 9.563 t/ha·a respectively. These data show that the biological productivity of T. sinensis is higher than that of Cunninghamia lanceolata in Huitong county, Hunan Province and in southern Jisngsu Province.

(4)The net primary production in T.sinensis forest is 1219.18g/m2·a; among them the arborous layer is 956.25g/m2·a; the grass layer and naturally seedlings are 161.10g/m2·a; the litter layer is 101.83g/m2·a. The utilization rate of solar energy in T. sinensis is 0.527 per cent and that of arborous layer is 0.417 during the growing season.