基于竹展开技术的毛竹竹板材碳转移分析

摘要

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 =0.0001x4 1377,R2 =0.694 3.%全程跟踪209株不同胸径分布的毛竹利用竹展开技术生产去青(5种规格)和带青(2种规格)2类竹板材的过程,探讨竹展开板材生产过程的碳转移特征.结果表明:1)2种不同规格带青竹板材的总计碳转移率平均为73.49％;5种不同规格去青竹板材的总计碳转移率平均为61.24％,其中长度840 mm比1 300 mm段竹材总计碳转移率高,且二者有显著性差异(P＜0.05);2)不同胸径毛竹展开板材(去青和带青)的综合碳转移率为52.37％ ～ 74.44％,平均为62.57％,其拟合方程为y=2.866 5x+ 29.641,R2 =0.3764;3)不同胸径毛竹展开板材的整株综合碳转移率为22.25％～ 67.84％,其拟合方程为y=8.646 2x-60.735,R2=0.645 5,随着胸径的增大毛竹展开板材的整株综合碳转移率增大;4)建立不同胸径单株毛竹与竹展开板材碳储量模型并拟合得到:y=0.000 1x4.1377,R2=0.6943.