进城截冠行道树碳贮量及固碳潜力的估算方法与应用

Method and its application for estimating carbon storage and sequestration potential of the large cutting crown trees planting along street

利用几何数学方法,以自然生长和未截冠行道树为对照,以长沙市韶山路栽植的截冠行道树为例,测定主要测树因子,推导出进城截冠行道树地上各部分生物量的估算模式,进而估算韶山路栽植的截冠行道树的生物量、现实的碳贮量以及其潜在的生物量和固碳能力。结果表明:13km的韶山路截冠行道树地上部分的现实生物量和碳贮量分别为159 564.44kg、78 380.40kg,其中韶山北路的最高,韶山南路为其次,韶山中路最低,均以树干的生物量和碳贮量占绝对的优势;韶山路不同路段单株截冠行道树平均生长潜力和固碳的潜力不同,平均生产潜力最大的是韶山北路,韶山中路为其次,韶山南路最小,分别为809.08kg、304.63kg、73.01kg,平均固碳潜力最大的也是韶山北路,韶山中路为其次,韶山南路最小,分别为409.55kg、154.16kg、37.37kg。韶山路采用截冠大树进行绿化后,固碳潜力达619 299.23kg,相当于固定CO22 270 763.73kg;平均每1km行道树潜在固碳量为47 638.40kg,可固定CO2174 674.13kg。

Using geometric mathematical method and taking the organically grown sidewalk trees and un-cutting crown sidewalk trees as control,the main measuring tree factors of cutting crown sidewalk trees transplanted in Shaoshan Road of Changsha were determined,and the evaluation mode for aboveground biomass of cutting crown trees which were carried to city was deduced,then the biomass and carbon storage of cutting crown sidewalk trees transplanted in Shaoshan Road as well as the potential of biomass and carbon stroage caused by cutting crown trees carried to city were estimated.The results are as follows： the aboveground biomass and carbon storage of sidewalk trees cut crown and transplanted along 13 km Shaoshan Road were 159 564.44 kg and 78 380.40 kg;the potential of average biomass and carbon storage of single cutting crown sidewalk tree on different section of Shaoshan Road were different,the greatest potential of average biomass was Shaoshan North Road tree,and the next was Shaoshan Middle Road,the least was Shaoshan South Road,which were 809.08 kg,304.63 kg and 73.01 kg,respectively,the growth rate were 93.43%,85.45% and 61.31%,respectively;the greatest average carbon sequestration potential also was the Shaoshan North Road,and the next was Shaoshan Middle Road,the least was Shaoshan South Road,which were respectively 409.55 kg,154.16 kg and 37.37 kg,the growth rates were 93.54%,85.73% and 62.63%,respectively;the cut crown trees were used to green the city on Shaoshan Road,which resulted in the carbon sequestration potential of 619 299.23 kg that was equivalent to fixing CO2 2 270 763.73 kg;the carbon sequestration potential yielded by trees in average per 1 kilometer was 47 638.40 kg,it can fix CO2 174 674.13 kg.