宝钢厂区植被碳储量及其固碳效益评价

Evaluation of Vegetation Carbon Storage and Carbon Fixation Benefits in Shanghai Baosteel Factory Area

以著名钢铁企业上海宝钢为例,基于厂区植被调查、航片数字化解释、优势种生物量测定及模型建立,对宝钢厂区植被碳储量和固碳能力进行估算,并通过碳税法对其固碳效益进行评价,以期为城市工业区绿地群落配置和绿化树种选择、企业绿化建设的费用效益分析提供更为科学的依据。结果表明:宝钢厂区植被总碳储量为3992.99～4736.17 t,固碳效益为13507.33～16185.85万元;平均碳密度为45.82～53.27 t/hm2,固碳能力为5.91～6.87t/(hm2.a),高于上海城市森林平均值,但小于中国森林平均值,一定程度上受平均胸径、郁闭度及群落密度等因素影响。厂区在进行绿化建设时,应考虑选择防污且固碳能力强的植物,构建防污固碳兼有型群落,发挥植被的多元功能。

Choosing Shanghai Baosteel Factory, a famous iron and steel company, as a stuoy case, me vegetation carbon storage and carbon fixation ability were estimated based on the investigation of vegetation in its sitel area, RS image digitization, measurement of dominant species＇ biomass and the establishment of model. The carbon fixation ability were evaluated through carbon tax to provide more scientific basis for the green-land communities configuration and tree species selection, also for the analysis of enterprise greening construction cost efficiency in urban industrial area. The results showed that the total vegetation carbon storage in the site area were 3992.99 -4736.17 t, carbon fixation benefits were 135. 0733 - 161. 8585 million yuan, average carbon density were 45.82 - 53.27 t/hm2, and carbon fixation ability was 5.91 -6.87 t/（ hm2· a） , which were higher than the averages of Shanghai urban forests, but lower than those of China forests. The vegetation carbon storage ability was influenced by average DBH, canopy density, community density and other factors in some extent. As greening construction carried out in its site area, the plants strong in antifouling and carbon fixation should be considered to choose as an antifouling and carbon fixation community to fully utilize multi-functions of the vegetations.