Abstract:

The manufacturing of bamboo plank using unfolding and flattening technology is a thirteen-step process including softening, seamless veneer flattening, molding and drying, etc. This paper investigated bamboo unfolding planks processd from 209 various bamboo stems and their carbon transfer ratio, and analyzed the carbon transfer characteristics of five specifications without green bark and two specifications with green bark. There were four important results. First, the average carbon transfer rate for bamboo plank with green bark was 73.49% and for the one without green bark was 61.24%, and the total carbon transfer rate for 840 mm length bamboo plank without green bark was significantly higher than the pieces of 1 300 mm length(P<0.05). Second, the aggregate carbon transfer rate of different bamboo diameters varied from 52.37% to 74.44%, with an average of 62.57%, the fitting equation was: y=2.886 5x+29.641, R²=0.376 4. Third, the carbon transfer ratio of unfolded planks out of whole stem with different diameters ranged from 22.25% to 67.84%, the fitting equation was: y=8.646 2x-60.375, R²=0.645 5, which indicated that the carbon transfer rate and diameter were positively linearly related. Fourth, the estimated relationship between carbon storage of moso bamboo unfolding planks and diameter was projected as: y=0.000 1x^{4.137 7},R²=0.694 3.

Key words: moso bamboo (Phyllostachys edulis), bamboo unfolding and flattening, bamboo plank, DBH, carbon transfer